Vulnerabilities > CVE-2008-5374 - Link Following vulnerability in Matthias Klose Bash-Doc 3.2

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2011:1090. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(79279);
  script_version("1.9");
  script_cvs_date("Date: 2019/10/25 13:36:16");

  script_cve_id("CVE-2011-1576");
  script_xref(name:"RHSA", value:"2011:1090");

  script_name(english:"RHEL 5 : rhev-hypervisor (RHSA-2011:1090)");
  script_summary(english:"Checks the rpm output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An updated rhev-hypervisor package that fixes one security issue and
several bugs is now available.

The Red Hat Security Response Team has rated this update as having
moderate security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from
the CVE link in the References section.

The rhev-hypervisor package provides a Red Hat Enterprise
Virtualization Hypervisor ISO disk image. The Red Hat Enterprise
Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine
(KVM) hypervisor. It includes everything necessary to run and manage
virtual machines: A subset of the Red Hat Enterprise Linux operating
environment and the Red Hat Enterprise Virtualization Agent.

Note: Red Hat Enterprise Virtualization Hypervisor is only available
for the Intel 64 and AMD64 architectures with virtualization
extensions.

A flaw was found that allowed napi_reuse_skb() to be called on VLAN
(virtual LAN) packets. An attacker on the local network could trigger
this flaw by sending specially crafted packets to a target system,
possibly causing a denial of service. (CVE-2011-1576)

Red Hat would like to thank Ryan Sweat for reporting CVE-2011-1576.

This updated package provides updated components that include fixes
for security issues; however, these issues have no security impact for
Red Hat Enterprise Virtualization Hypervisor. These fixes are for bash
issue CVE-2008-5374; curl issue CVE-2011-2192; kernel issues
CVE-2010-4649, CVE-2011-0695, CVE-2011-0711, CVE-2011-1044,
CVE-2011-1182, CVE-2011-1573, CVE-2011-1593, CVE-2011-1745,
CVE-2011-1746, CVE-2011-1776, CVE-2011-1780, CVE-2011-1936,
CVE-2011-2022, CVE-2011-2213, CVE-2011-2492, CVE-2011-2525, and
CVE-2011-2689; libvirt issue CVE-2011-2511; and rsync issue
CVE-2007-6200.

This update also fixes several bugs. Documentation for these bug fixes
will be available shortly from the Technical Notes document linked to
in the References section.

As Red Hat Enterprise Virtualization Hypervisor is based on KVM, the
bug fixes from the KVM update RHBA-2011:1068 have been included in
this update :

https://rhn.redhat.com/errata/RHBA-2011-1068.html

Users of Red Hat Enterprise Virtualization Hypervisor are advised to
upgrade to this updated package, which resolves this issue and fixes
the bugs noted in the Technical Notes."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2011-1576"
  );
  # https://docs.redhat.com/docs/en-US/
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/documentation/en-US/"
  );
  # https://rhn.redhat.com/errata/RHBA-2011-1068.html
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHBA-2011:1068"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2011:1090"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected rhev-hypervisor package."
  );
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:N/C:N/I:N/A:C");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rhev-hypervisor");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");

  script_set_attribute(attribute:"vuln_publication_date", value:"2011/08/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/07/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/11/17");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

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

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 5.x", "Red Hat " + os_ver);

if (!get_kb_item("Host/RedHat/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$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2011:1090";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL5", reference:"rhev-hypervisor-5.7-20110725.1.el5")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "rhev-hypervisor");
  }
}

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#

include("compat.inc");

if (description)
{
  script_id(60956);
  script_version("1.4");
  script_cvs_date("Date: 2019/10/25 13:36:19");

  script_cve_id("CVE-2008-5374");

  script_name(english:"Scientific Linux Security Update : bash on SL4.x i386/x86_64");
  script_summary(english:"Checks rpm output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Scientific Linux host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was found that certain scripts bundled with the Bash documentation
created temporary files in an insecure way. A malicious, local user
could use this flaw to conduct a symbolic link attack, allowing them
to overwrite the contents of arbitrary files accessible to the victim
running the scripts. (CVE-2008-5374)

This update also fixes the following bugs :

  - If a child process's PID was the same as the PID of a
    previously ended child process, Bash did not wait for
    that child process. In some cases this caused 'Resource
    temporarily unavailable' errors. With this update, Bash
    recycles PIDs and waits for processes with recycled
    PIDs. (BZ#521134)

  - Bash's built-in 'read' command had a memory leak when
    'read' failed due to no input (pipe for stdin). With
    this update, the memory is correctly freed. (BZ#537029)

  - Bash did not correctly check for a valid multi-byte
    string when setting the IFS value, causing Bash to
    crash. With this update, Bash checks the multi-byte
    string and no longer crashes. (BZ#539536)

  - Bash incorrectly set locale settings when using the
    built-in 'export' command and setting the locale on the
    same line (for example, with 'LC_ALL=C export LC_ALL').
    With this update, Bash correctly sets locale settings.
    (BZ#539538)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=521134"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=537029"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=539536"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=539538"
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1102&L=scientific-linux-errata&T=0&P=2085
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?83b1fe0c"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected bash package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_cwe_id(59);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/02/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/08/01");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Scientific Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/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/RedHat/release");
if (isnull(release) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

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


flag = 0;
if (rpm_check(release:"SL4", reference:"bash-3.0-27.el4")) flag++;


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

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2011:0261. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(52008);
  script_version ("1.17");
  script_cvs_date("Date: 2019/10/25 13:36:15");

  script_cve_id("CVE-2008-5374");
  script_bugtraq_id(32733);
  script_xref(name:"RHSA", value:"2011:0261");

  script_name(english:"RHEL 4 : bash (RHSA-2011:0261)");
  script_summary(english:"Checks the rpm output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated bash packages that fix one security issue and several bugs are
now available for Red Hat Enterprise Linux 4.

The Red Hat Security Response Team has rated this update as having low
security impact. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available from the
CVE link in the References section.

Bash (Bourne-again shell) is the default shell for Red Hat Enterprise
Linux.

It was found that certain scripts bundled with the Bash documentation
created temporary files in an insecure way. A malicious, local user
could use this flaw to conduct a symbolic link attack, allowing them
to overwrite the contents of arbitrary files accessible to the victim
running the scripts. (CVE-2008-5374)

This update also fixes the following bugs :

* If a child process's PID was the same as the PID of a previously
ended child process, Bash did not wait for that child process. In some
cases this caused 'Resource temporarily unavailable' errors. With this
update, Bash recycles PIDs and waits for processes with recycled PIDs.
(BZ#521134)

* Bash's built-in 'read' command had a memory leak when 'read' failed
due to no input (pipe for stdin). With this update, the memory is
correctly freed. (BZ#537029)

* Bash did not correctly check for a valid multi-byte string when
setting the IFS value, causing Bash to crash. With this update, Bash
checks the multi-byte string and no longer crashes. (BZ#539536)

* Bash incorrectly set locale settings when using the built-in
'export' command and setting the locale on the same line (for example,
with 'LC_ALL=C export LC_ALL'). With this update, Bash correctly sets
locale settings. (BZ#539538)

All bash users should upgrade to these updated packages, which contain
backported patches to correct these issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2008-5374"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2011:0261"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected bash package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:ND");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(59);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:bash");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4");

  script_set_attribute(attribute:"vuln_publication_date", value:"2008/12/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/02/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/02/17");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

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

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^4([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 4.x", "Red Hat " + os_ver);

if (!get_kb_item("Host/RedHat/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$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2011:0261";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL4", reference:"bash-3.0-27.el4")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "bash");
  }
}