Vulnerabilities > CVE-2014-10070 - Permissions, Privileges, and Access Controls vulnerability in ZSH Project ZSH

047910
CVSS 7.8 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
local
low complexity
zsh-project
CWE-264
nessus
NVD
Published: 2018-02-27
Updated: 2018-03-21

Summary

zsh before 5.0.7 allows evaluation of the initial values of integer variables imported from the environment (instead of treating them as literal numbers). That could allow local privilege escalation, under some specific and atypical conditions where zsh is being invoked in privilege-elevation contexts when the environment has not been properly sanitized, such as when zsh is invoked by sudo on systems where "env_reset" has been disabled.

Vulnerable Configurations

Part Description Count
Application
Zsh_Project
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-1072-1.NASL
    descriptionThis update for zsh fixes the following issues : - CVE-2014-10070: environment variable injection could lead to local privilege escalation (bnc#1082885) - CVE-2014-10071: buffer overflow in exec.c could lead to denial of service. (bnc#1082977) - CVE-2014-10072: buffer overflow In utils.c when scanning very long directory paths for symbolic links. (bnc#1082975) - CVE-2016-10714: In zsh before 5.3, an off-by-one error resulted in undersized buffers that were intended to support PATH_MAX characters. (bnc#1083250) - CVE-2017-18205: In builtin.c when sh compatibility mode is used, a NULL pointer dereference could lead to denial of service (bnc#1082998) - CVE-2018-1071: exec.c:hashcmd() function vulnerability could lead to denial of service. (bnc#1084656) - CVE-2018-1083: Autocomplete vulnerability could lead to privilege escalation. (bnc#1087026) - CVE-2018-7549: In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p. (bnc#1082991) - CVE-2017-18206: buffer overrun in xsymlinks could lead to denial of service (bnc#1083002) - Autocomplete and REPORTTIME broken (bsc#896914) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id109355
    published2018-04-26
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/109355
    titleSUSE SLED12 / SLES12 Security Update : zsh (SUSE-SU-2018:1072-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:1072-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(109355);
  script_version("1.3");
  script_cvs_date("Date: 2019/09/10 13:51:47");

  script_cve_id("CVE-2014-10070", "CVE-2014-10071", "CVE-2014-10072", "CVE-2016-10714", "CVE-2017-18205", "CVE-2017-18206", "CVE-2018-1071", "CVE-2018-1083", "CVE-2018-7549");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : zsh (SUSE-SU-2018:1072-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for zsh fixes the following issues :

  - CVE-2014-10070: environment variable injection could
    lead to local privilege escalation (bnc#1082885)

  - CVE-2014-10071: buffer overflow in exec.c could lead to
    denial of service. (bnc#1082977)

  - CVE-2014-10072: buffer overflow In utils.c when scanning
    very long directory paths for symbolic links.
    (bnc#1082975)

  - CVE-2016-10714: In zsh before 5.3, an off-by-one error
    resulted in undersized buffers that were intended to
    support PATH_MAX characters. (bnc#1083250)

  - CVE-2017-18205: In builtin.c when sh compatibility mode
    is used, a NULL pointer dereference could lead to denial
    of service (bnc#1082998)

  - CVE-2018-1071: exec.c:hashcmd() function vulnerability
    could lead to denial of service. (bnc#1084656)

  - CVE-2018-1083: Autocomplete vulnerability could lead to
    privilege escalation. (bnc#1087026)

  - CVE-2018-7549: In params.c in zsh through 5.4.2, there
    is a crash during a copy of an empty hash table, as
    demonstrated by typeset -p. (bnc#1082991)

  - CVE-2017-18206: buffer overrun in xsymlinks could lead
    to denial of service (bnc#1083002)

  - Autocomplete and REPORTTIME broken (bsc#896914)

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1082885"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1082975"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1082977"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1082991"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1082998"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1083002"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1083250"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1084656"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1087026"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=896914"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2014-10070/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2014-10071/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2014-10072/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-10714/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-18205/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-18206/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-1071/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-1083/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-7549/"
  );
  # https://www.suse.com/support/update/announcement/2018/suse-su-20181072-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?b49a1ec1"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server 12-SP3:zypper in -t patch
SUSE-SLE-SERVER-12-SP3-2018-733=1

SUSE Linux Enterprise Desktop 12-SP3:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP3-2018-733=1"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:zsh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:zsh-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:zsh-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/04/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/26");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED12|SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED12 / SLES12", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP3", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP3", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"3", reference:"zsh-5.0.5-6.7.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"zsh-debuginfo-5.0.5-6.7.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"zsh-debugsource-5.0.5-6.7.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"zsh-5.0.5-6.7.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"zsh-debuginfo-5.0.5-6.7.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"zsh-debugsource-5.0.5-6.7.2")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "zsh");
}
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2018-1090.NASL
    descriptionAccording to the versions of the zsh package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - The zsh shell is a command interpreter usable as an interactive login shell and as a shell script command processor. Zsh resembles the ksh shell (the Korn shell), but includes many enhancements. Zsh supports command line editing, built-in spelling correction, programmable command completion, shell functions (with autoloading), a history mechanism, and more. - Security fix(es): - In builtin.c in zsh before 5.4, when sh compatibility mode is used, there is a NULL pointer dereference during processing of the cd command with no argument if HOME is not set.(CVE-2017-18205) - zsh before 5.0.7 allows evaluation of the initial values of integer variables imported from the environment (instead of treating them as literal numbers). That could allow local privilege escalation, under some specific and atypical conditions where zsh is being invoked in privilege-elevation contexts when the environment has not been properly sanitized, such as when zsh is invoked by sudo on systems where
    last seen2020-05-06
    modified2018-05-02
    plugin id109488
    published2018-05-02
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/109488
    titleEulerOS 2.0 SP1 : zsh (EulerOS-SA-2018-1090)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(109488);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/04");

  script_cve_id(
    "CVE-2014-10070",
    "CVE-2014-10071",
    "CVE-2017-18205",
    "CVE-2017-18206",
    "CVE-2018-7549"
  );

  script_name(english:"EulerOS 2.0 SP1 : zsh (EulerOS-SA-2018-1090)");
  script_summary(english:"Checks the rpm output for the updated packages.");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the zsh package installed, the EulerOS
installation on the remote host is affected by the following
vulnerabilities :

  - The zsh shell is a command interpreter usable as an
    interactive login shell and as a shell script command
    processor. Zsh resembles the ksh shell (the Korn
    shell), but includes many enhancements. Zsh supports
    command line editing, built-in spelling correction,
    programmable command completion, shell functions (with
    autoloading), a history mechanism, and more.

  - Security fix(es):

  - In builtin.c in zsh before 5.4, when sh compatibility
    mode is used, there is a NULL pointer dereference
    during processing of the cd command with no argument if
    HOME is not set.(CVE-2017-18205)

  - zsh before 5.0.7 allows evaluation of the initial
    values of integer variables imported from the
    environment (instead of treating them as literal
    numbers). That could allow local privilege escalation,
    under some specific and atypical conditions where zsh
    is being invoked in privilege-elevation contexts when
    the environment has not been properly sanitized, such
    as when zsh is invoked by sudo on systems where
    'env_reset' has been disabled.(CVE-2014-10070)

  - In exec.c in zsh before 5.0.7, there is a buffer
    overflow for very long fds in the 'i1/4zi1/4+ fd'
    syntax.(CVE-2014-10071)

  - A buffer overflow flaw was found in the zsh shell
    symbolic link resolver. A local, unprivileged user can
    create a specially crafted directory path which leads
    to a buffer overflow in the context of the user trying
    to do a symbolic link resolution in the aforementioned
    path. If the user affected is privileged, this leads to
    privilege escalation.(CVE-2017-18206)

  - In params.c in zsh through 5.4.2, there is a crash
    during a copy of an empty hash table, as demonstrated
    by typeset -p.(CVE-2018-7549)

Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2018-1090
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?785f66ef");
  script_set_attribute(attribute:"solution", value:
"Update the affected zsh packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/03/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:zsh");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Huawei Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");

sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(1)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP1");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP1", "EulerOS UVP " + uvp);

if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["zsh-5.0.2-7.h5"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"1", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "zsh");
}
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2018-399.NASL
    descriptionThis update for zsh fixes the following issues : - CVE-2014-10070: environment variable injection could lead to local privilege escalation (bnc#1082885) - CVE-2014-10071: buffer overflow in exec.c could lead to denial of service. (bnc#1082977) - CVE-2014-10072: buffer overflow In utils.c when scanning very long directory paths for symbolic links. (bnc#1082975) - CVE-2016-10714: In zsh before 5.3, an off-by-one error resulted in undersized buffers that were intended to support PATH_MAX characters. (bnc#1083250) - CVE-2017-18205: In builtin.c when sh compatibility mode is used, a NULL pointer dereference could lead to denial of service (bnc#1082998) - CVE-2018-1071: exec.c:hashcmd() function vulnerability could lead to denial of service. (bnc#1084656) - CVE-2018-1083: Autocomplete vulnerability could lead to privilege escalation. (bnc#1087026) - CVE-2018-7549: In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p. (bnc#1082991) - CVE-2017-18206: buffer overrun in xsymlinks could lead to denial of service (bnc#1083002) - Autocomplete and REPORTTIME broken (bsc#896914) This update was imported from the SUSE:SLE-12:Update update project.
    last seen2020-06-05
    modified2018-04-27
    plugin id109384
    published2018-04-27
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/109384
    titleopenSUSE Security Update : zsh (openSUSE-2018-399)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2018-399.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(109384);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2014-10070", "CVE-2014-10071", "CVE-2014-10072", "CVE-2016-10714", "CVE-2017-18205", "CVE-2017-18206", "CVE-2018-1071", "CVE-2018-1083", "CVE-2018-7549");

  script_name(english:"openSUSE Security Update : zsh (openSUSE-2018-399)");
  script_summary(english:"Check for the openSUSE-2018-399 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for zsh fixes the following issues :

  - CVE-2014-10070: environment variable injection could
    lead to local privilege escalation (bnc#1082885)

  - CVE-2014-10071: buffer overflow in exec.c could lead to
    denial of service. (bnc#1082977)

  - CVE-2014-10072: buffer overflow In utils.c when scanning
    very long directory paths for symbolic links.
    (bnc#1082975)

  - CVE-2016-10714: In zsh before 5.3, an off-by-one error
    resulted in undersized buffers that were intended to
    support PATH_MAX characters. (bnc#1083250)

  - CVE-2017-18205: In builtin.c when sh compatibility mode
    is used, a NULL pointer dereference could lead to denial
    of service (bnc#1082998)

  - CVE-2018-1071: exec.c:hashcmd() function vulnerability
    could lead to denial of service. (bnc#1084656)

  - CVE-2018-1083: Autocomplete vulnerability could lead to
    privilege escalation. (bnc#1087026)

  - CVE-2018-7549: In params.c in zsh through 5.4.2, there
    is a crash during a copy of an empty hash table, as
    demonstrated by typeset -p. (bnc#1082991)

  - CVE-2017-18206: buffer overrun in xsymlinks could lead
    to denial of service (bnc#1083002)

  - Autocomplete and REPORTTIME broken (bsc#896914)

This update was imported from the SUSE:SLE-12:Update update project."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1082885"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1082975"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1082977"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1082991"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1082998"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1083002"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1083250"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1084656"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1087026"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=896914"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected zsh packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:zsh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:zsh-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:zsh-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:zsh-htmldoc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.3");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/04/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/27");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE42\.3)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "42.3", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(x86_64)$") audit(AUDIT_ARCH_NOT, "x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE42.3", reference:"zsh-5.0.5-9.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"zsh-debuginfo-5.0.5-9.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"zsh-debugsource-5.0.5-9.3.1") ) flag++;
if ( rpm_check(release:"SUSE42.3", reference:"zsh-htmldoc-5.0.5-9.3.1") ) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "zsh / zsh-debuginfo / zsh-debugsource / zsh-htmldoc");
}
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2018-1091.NASL
    descriptionAccording to the versions of the zsh package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - The zsh shell is a command interpreter usable as an interactive login shell and as a shell script command processor. Zsh resembles the ksh shell (the Korn shell), but includes many enhancements. Zsh supports command line editing, built-in spelling correction, programmable command completion, shell functions (with autoloading), a history mechanism, and more. - Security fix(es): - In builtin.c in zsh before 5.4, when sh compatibility mode is used, there is a NULL pointer dereference during processing of the cd command with no argument if HOME is not set.(CVE-2017-18205) - zsh before 5.0.7 allows evaluation of the initial values of integer variables imported from the environment (instead of treating them as literal numbers). That could allow local privilege escalation, under some specific and atypical conditions where zsh is being invoked in privilege-elevation contexts when the environment has not been properly sanitized, such as when zsh is invoked by sudo on systems where
    last seen2020-05-06
    modified2018-05-02
    plugin id109489
    published2018-05-02
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/109489
    titleEulerOS 2.0 SP2 : zsh (EulerOS-SA-2018-1091)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(109489);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/04");

  script_cve_id(
    "CVE-2014-10070",
    "CVE-2014-10071",
    "CVE-2017-18205",
    "CVE-2017-18206",
    "CVE-2018-7549"
  );

  script_name(english:"EulerOS 2.0 SP2 : zsh (EulerOS-SA-2018-1091)");
  script_summary(english:"Checks the rpm output for the updated packages.");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the zsh package installed, the EulerOS
installation on the remote host is affected by the following
vulnerabilities :

  - The zsh shell is a command interpreter usable as an
    interactive login shell and as a shell script command
    processor. Zsh resembles the ksh shell (the Korn
    shell), but includes many enhancements. Zsh supports
    command line editing, built-in spelling correction,
    programmable command completion, shell functions (with
    autoloading), a history mechanism, and more.

  - Security fix(es):

  - In builtin.c in zsh before 5.4, when sh compatibility
    mode is used, there is a NULL pointer dereference
    during processing of the cd command with no argument if
    HOME is not set.(CVE-2017-18205)

  - zsh before 5.0.7 allows evaluation of the initial
    values of integer variables imported from the
    environment (instead of treating them as literal
    numbers). That could allow local privilege escalation,
    under some specific and atypical conditions where zsh
    is being invoked in privilege-elevation contexts when
    the environment has not been properly sanitized, such
    as when zsh is invoked by sudo on systems where
    'env_reset' has been disabled.(CVE-2014-10070)

  - In exec.c in zsh before 5.0.7, there is a buffer
    overflow for very long fds in the 'i1/4zi1/4+ fd'
    syntax.(CVE-2014-10071)

  - A buffer overflow flaw was found in the zsh shell
    symbolic link resolver. A local, unprivileged user can
    create a specially crafted directory path which leads
    to a buffer overflow in the context of the user trying
    to do a symbolic link resolution in the aforementioned
    path. If the user affected is privileged, this leads to
    privilege escalation.(CVE-2017-18206)

  - In params.c in zsh through 5.4.2, there is a crash
    during a copy of an empty hash table, as demonstrated
    by typeset -p.(CVE-2018-7549)

Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2018-1091
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a73d4f52");
  script_set_attribute(attribute:"solution", value:
"Update the affected zsh packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/03/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:zsh");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Huawei Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");

sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(2)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2", "EulerOS UVP " + uvp);

if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["zsh-5.0.2-7.h5"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"2", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "zsh");
}
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3593-1.NASL
    descriptionIt was discovered that Zsh incorrectly handled certain enviroment variables. An attacker could possibly use this issue to gain privileged access to the system. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-10070) It was discovered that Zsh incorrectly handled certain inputs. An attacker could possibly use this to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-10071) It was discovered that Zsh incorrectly handled some symbolic links. An attacker could possibly use this to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-10072) It was discovered that Zsh incorrectly handled certain errors. An attacker could possibly use this issue to cause a denial of service. (CVE-2016-10714) It was discovered that Zsh incorrectly handled certain commands. An attacker could possibly use this to execute arbitrary code. (CVE-2017-18205) It was discovered that Zsh incorrectly handled certain symlinks. An attacker could possibly use this to execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-18206) It was discovered that Zsh incorrectly handled certain inputs. An attacker could possible use to execute arbitrary code. This issue only affected Ubuntu 17.10. (CVE-2018-7548) It was discovered that Zsh incorrectly handled certain inputs. An attacker could possibly use this to cause a denial of service. (CVE-2018-7549). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id107257
    published2018-03-09
    reporterUbuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/107257
    titleUbuntu 14.04 LTS / 16.04 LTS / 17.10 : zsh vulnerabilities (USN-3593-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3593-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(107257);
  script_version("1.4");
  script_cvs_date("Date: 2019/09/18 12:31:48");

  script_cve_id("CVE-2014-10070", "CVE-2014-10071", "CVE-2014-10072", "CVE-2016-10714", "CVE-2017-18205", "CVE-2017-18206", "CVE-2018-7548", "CVE-2018-7549");
  script_xref(name:"USN", value:"3593-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 17.10 : zsh vulnerabilities (USN-3593-1)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that Zsh incorrectly handled certain enviroment
variables. An attacker could possibly use this issue to gain
privileged access to the system. This issue only affected Ubuntu 14.04
LTS. (CVE-2014-10070)

It was discovered that Zsh incorrectly handled certain inputs. An
attacker could possibly use this to execute arbitrary code. This issue
only affected Ubuntu 14.04 LTS. (CVE-2014-10071)

It was discovered that Zsh incorrectly handled some symbolic links. An
attacker could possibly use this to execute arbitrary code. This issue
only affected Ubuntu 14.04 LTS. (CVE-2014-10072)

It was discovered that Zsh incorrectly handled certain errors. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2016-10714)

It was discovered that Zsh incorrectly handled certain commands. An
attacker could possibly use this to execute arbitrary code.
(CVE-2017-18205)

It was discovered that Zsh incorrectly handled certain symlinks. An
attacker could possibly use this to execute arbitrary code. This issue
only affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-18206)

It was discovered that Zsh incorrectly handled certain inputs. An
attacker could possible use to execute arbitrary code. This issue only
affected Ubuntu 17.10. (CVE-2018-7548)

It was discovered that Zsh incorrectly handled certain inputs. An
attacker could possibly use this to cause a denial of service.
(CVE-2018-7549).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://usn.ubuntu.com/3593-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected zsh package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:zsh");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:17.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/03/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/09");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(14\.04|16\.04|17\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04 / 17.10", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"14.04", pkgname:"zsh", pkgver:"5.0.2-3ubuntu6.1")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"zsh", pkgver:"5.1.1-1ubuntu2.1")) flag++;
if (ubuntu_check(osver:"17.10", pkgname:"zsh", pkgver:"5.2-5ubuntu1.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "zsh");
}
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1304.NASL
    descriptionIt was discovered that there were multiple vulnerabilities in the
    last seen2020-03-17
    modified2018-03-12
    plugin id107276
    published2018-03-12
    reporterThis script is Copyright (C) 2018-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/107276
    titleDebian DLA-1304-1 : zsh security update
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1304-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(107276);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_name(english:"Debian DLA-1304-1 : zsh security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that there were multiple vulnerabilities in the
'zsh' shell :

  - CVE-2014-10070: Fix a privilege-elevation issue if the
    environment has not been properly sanitized.

  - CVE-2014-10071: Prevent a buffer overflow for very long
    file

  - descriptors in the '>& fd' syntax.

  - CVE-2014-10072: Correct a buffer overflow when scanning
    very long directory paths for symbolic links.

  - CVE-2016-10714: Fix an off-by-one error that was
    resulting in undersized buffers that were intended to
    support PATH_MAX.

  - CVE-2017-18206: Fix a buffer overflow in symlink
    expansion.

For Debian 7 'Wheezy', this issue has been fixed in zsh version
4.3.17-1+deb7u1.

We recommend that you upgrade your zsh packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.debian.org/debian-lts-announce/2018/03/msg00007.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/zsh"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"High");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:zsh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:zsh-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:zsh-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:zsh-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:zsh-static");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/03/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/12");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2020 Tenable Network Security, Inc.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"7.0", prefix:"zsh", reference:"4.3.17-1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"zsh-dbg", reference:"4.3.17-1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"zsh-dev", reference:"4.3.17-1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"zsh-doc", reference:"4.3.17-1+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"zsh-static", reference:"4.3.17-1+deb7u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References