Vulnerabilities > CVE-2017-7418 - Link Following vulnerability in Proftpd 1.3.2/1.3.4/1.3.6

047910
CVSS 5.5 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
NONE
Integrity impact
HIGH
Availability impact
NONE
local
low complexity
proftpd
CWE-59
nessus
NVD
Published: 2017-04-04
Updated: 2024-11-21

Summary

ProFTPD before 1.3.5e and 1.3.6 before 1.3.6rc5 controls whether the home directory of a user could contain a symbolic link through the AllowChrootSymlinks configuration option, but checks only the last path component when enforcing AllowChrootSymlinks. Attackers with local access could bypass the AllowChrootSymlinks control by replacing a path component (other than the last one) with a symbolic link. The threat model includes an attacker who is not granted full filesystem access by a hosting provider, but can reconfigure the home directory of an FTP user.

Vulnerable Configurations

Part Description Count
Application
Proftpd
7

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Symlink Attack
    An attacker positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name. The endpoint file may be either output or input. If the file is output, the result is that the endpoint is modified, instead of a file at the intended location. Modifications to the endpoint file may include appending, overwriting, corrupting, changing permissions, or other modifications. In some variants of this attack the attacker may be able to control the change to a file while in other cases they cannot. The former is especially damaging since the attacker may be able to grant themselves increased privileges or insert false information, but the latter can also be damaging as it can expose sensitive information or corrupt or destroy vital system or application files. Alternatively, the endpoint file may serve as input to the targeted application. This can be used to feed malformed input into the target or to cause the target to process different information, possibly allowing the attacker to control the actions of the target or to cause the target to expose information to the attacker. Moreover, the actions taken on the endpoint file are undertaken with the permissions of the targeted user or application, which may exceed the permissions that the attacker would normally have.
  • 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.
  • Manipulating Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-C6F424C3FF.NASL
    descriptionCurrent upstream maintenance release for the 1.3.5 series. Includes fix for CVE-2017-7418, where not all path elements were checked for symlinks when using a chroot, so attackers with local access could bypass the AllowChrootSymlinks control by replacing a path component (other than the last one) with a symbolic link. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2017-04-20
    plugin id99493
    published2017-04-20
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/99493
    titleFedora 25 : proftpd (2017-c6f424c3ff)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2017-c6f424c3ff.
#

include("compat.inc");

if (description)
{
  script_id(99493);
  script_version("3.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2017-7418");
  script_xref(name:"FEDORA", value:"2017-c6f424c3ff");

  script_name(english:"Fedora 25 : proftpd (2017-c6f424c3ff)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Current upstream maintenance release for the 1.3.5 series.

Includes fix for CVE-2017-7418, where not all path elements were
checked for symlinks when using a chroot, so attackers with local
access could bypass the AllowChrootSymlinks control by replacing a
path component (other than the last one) with a symbolic link.

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora update system website.
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://bodhi.fedoraproject.org/updates/FEDORA-2017-c6f424c3ff"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected proftpd package."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:proftpd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:25");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/04/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/04/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/04/20");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "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) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! preg(pattern:"^25([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 25", "Fedora " + 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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);


flag = 0;
if (rpm_check(release:"FC25", reference:"proftpd-1.3.5e-1.fc25")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    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, "proftpd");
}
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2019-1836.NASL
    descriptionThis update for proftpd fixes the following issues : Security issues fixed : - CVE-2019-12815: Fixed arbitrary file copy in mod_copy that allowed for remote code execution and information disclosure without authentication (bnc#1142281).
    last seen2020-06-01
    modified2020-06-02
    plugin id127741
    published2019-08-12
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/127741
    titleopenSUSE Security Update : proftpd (openSUSE-2019-1836)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2019-1836.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(127741);
  script_version("1.2");
  script_cvs_date("Date: 2020/01/06");

  script_cve_id("CVE-2017-7418", "CVE-2019-12815");

  script_name(english:"openSUSE Security Update : proftpd (openSUSE-2019-1836)");
  script_summary(english:"Check for the openSUSE-2019-1836 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 proftpd fixes the following issues :

Security issues fixed :

  - CVE-2019-12815: Fixed arbitrary file copy in mod_copy
    that allowed for remote code execution and information
    disclosure without authentication (bnc#1142281)."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1142281"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected proftpd packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  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_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-lang");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-ldap-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-mysql-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-pgsql-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-radius");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-radius-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-sqlite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:proftpd-sqlite-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.1");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/04/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/08/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/12");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 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 !~ "^(SUSE15\.0|SUSE15\.1)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0 / 15.1", 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:"SUSE15.0", reference:"proftpd-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-debuginfo-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-debugsource-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-devel-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-lang-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-ldap-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-ldap-debuginfo-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-mysql-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-mysql-debuginfo-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-pgsql-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-pgsql-debuginfo-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-radius-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-radius-debuginfo-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-sqlite-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"proftpd-sqlite-debuginfo-1.3.5e-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-debuginfo-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-debugsource-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-devel-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-lang-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-ldap-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-ldap-debuginfo-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-mysql-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-mysql-debuginfo-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-pgsql-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-pgsql-debuginfo-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-radius-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-radius-debuginfo-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-sqlite-1.3.5e-lp151.3.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"proftpd-sqlite-debuginfo-1.3.5e-lp151.3.3.1") ) 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, "proftpd / proftpd-debuginfo / proftpd-debugsource / proftpd-devel / etc");
}
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-E15E37B689.NASL
    descriptionCurrent upstream maintenance release for the 1.3.5 series. Includes fix for CVE-2017-7418, where not all path elements were checked for symlinks when using a chroot, so attackers with local access could bypass the AllowChrootSymlinks control by replacing a path component (other than the last one) with a symbolic link. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2017-04-19
    plugin id99446
    published2017-04-19
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/99446
    titleFedora 24 : proftpd (2017-e15e37b689)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2017-e15e37b689.
#

include("compat.inc");

if (description)
{
  script_id(99446);
  script_version("3.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2017-7418");
  script_xref(name:"FEDORA", value:"2017-e15e37b689");

  script_name(english:"Fedora 24 : proftpd (2017-e15e37b689)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Current upstream maintenance release for the 1.3.5 series.

Includes fix for CVE-2017-7418, where not all path elements were
checked for symlinks when using a chroot, so attackers with local
access could bypass the AllowChrootSymlinks control by replacing a
path component (other than the last one) with a symbolic link.

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora update system website.
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://bodhi.fedoraproject.org/updates/FEDORA-2017-e15e37b689"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected proftpd package."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:proftpd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:24");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/04/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/04/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/04/19");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "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) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! preg(pattern:"^24([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 24", "Fedora " + 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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);


flag = 0;
if (rpm_check(release:"FC24", reference:"proftpd-1.3.5e-1.fc24")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    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, "proftpd");
}
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2020-31.NASL
    descriptionThis update for proftpd fixes the following issues : - GeoIP has been discontinued by Maxmind (boo#1156210) This update removes module build for geoip see https://support.maxmind.com/geolite-legacy-discontinuati on-notice/ - CVE-2019-19269: Fixed a NULL pointer dereference may occur when validating the certificate of a client connecting to the server (boo#1157803) - CVE-2019-19270: Fixed a Failure to check for the appropriate field of a CRL entry prevents some valid CRLs from being taken into account (boo#1157798) - CVE-2019-18217: Fixed remote unauthenticated denial-of-service due to incorrect handling of overly long commands (boo#1154600 gh#846) Update to 1.3.6b - Fixed pre-authentication remote denial-of-service issue (Issue #846). - Backported fix for building mod_sql_mysql using MySQL 8 (Issue #824). Update to 1.3.6a : - Fixed symlink navigation (Bug#4332). - Fixed building of mod_sftp using OpenSSL 1.1.x releases (Issue#674). - Fixed SITE COPY honoring of <Limit> restrictions (Bug#4372). - Fixed segfault on login when using mod_sftp + mod_sftp_pam (Issue#656). - Fixed restarts when using mod_facl as a static module - Add missing Requires(pre): group(ftp) for Leap 15 and Tumbleweed (boo#1155834) - Add missing Requires(pre): user(ftp) for Leap 15 and Tumbleweed (boo#1155834) - Use pam_keyinit.so (boo#1144056) - Reduce hard dependency on systemd to only that which is necessary for building and installation. update to 1.3.6 : - Support for using Redis for caching, logging; see the doc/howto/Redis.html documentation. - Fixed mod_sql_postgres SSL support (Issue #415). - Support building against LibreSSL instead of OpenSSL (Issue #361). - Better support on AIX for login restraictions (Bug #4285). - TimeoutLogin (and other timeouts) were not working properly for SFTP connections (Bug#4299). - Handling of the SIGILL and SIGINT signals, by the daemon process, now causes the child processes to be terminated as well (Issue #461). - RPM .spec file naming changed to conform to Fedora guidelines. - Fix for
    last seen2020-06-01
    modified2020-06-02
    plugin id132911
    published2020-01-15
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/132911
    titleopenSUSE Security Update : proftpd (openSUSE-2020-31)
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_770D7E9172AF11E7998A08606E47F965.NASL
    descriptionNVD reports : ProFTPD ... controls whether the home directory of a user could contain a symbolic link through the AllowChrootSymlinks configuration option, but checks only the last path component when enforcing AllowChrootSymlinks. Attackers with local access could bypass the AllowChrootSymlinks control by replacing a path component (other than the last one) with a symbolic link.
    last seen2020-06-01
    modified2020-06-02
    plugin id102030
    published2017-07-28
    reporterThis script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102030
    titleFreeBSD : proftpd -- user chroot escape vulnerability (770d7e91-72af-11e7-998a-08606e47f965)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-5A01498B4B.NASL
    descriptionCurrent upstream maintenance release for the 1.3.5 series. Includes fix for CVE-2017-7418, where not all path elements were checked for symlinks when using a chroot, so attackers with local access could bypass the AllowChrootSymlinks control by replacing a path component (other than the last one) with a symbolic link. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2017-07-17
    plugin id101637
    published2017-07-17
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/101637
    titleFedora 26 : proftpd (2017-5a01498b4b)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2017-481.NASL
    descriptionThis update for proftpd to version 1.3.5d fixes the following issues : This security issue was fixed : - CVE-2017-7418: ProFTPD checked only the last path component when enforcing AllowChrootSymlinks. Attackers with local access could bypass the AllowChrootSymlinks control by replacing a path component (other than the last one) with a symbolic link (bsc#1032443). These non-security issues were fixed : - Reduce TLS protocols to TLSv1.1 and TLSv1.2 - Disable TLSCACertificateFile - Add TLSCertificateChainFile - All FTP logins are treated as anonymous logins again - SSH rekey during authentication could have caused issues with clients. - Recursive SCP uploads of multiple directories were not handled properly. - LIST returned different results for file, depending on path syntax. -
    last seen2020-06-05
    modified2017-04-18
    plugin id99430
    published2017-04-18
    reporterThis script is Copyright (C) 2017-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/99430
    titleopenSUSE Security Update : proftpd (openSUSE-2017-481)
  • NASL familyFTP
    NASL idPROFTPD_1_3_6_RC5.NASL
    descriptionThe remote host is using ProFTPD, a free FTP server for Unix and Linux. According to its banner, the version of ProFTPD installed on the remote host is prior to 1.3.5e or 1.3.6x prior to 1.3.6rc5 and is affected by an issue where an attacker who is not granted full filesystem access may reconfigure the home directory of an FTP user.
    last seen2020-06-01
    modified2020-06-02
    plugin id106756
    published2018-02-12
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106756
    titleProFTPD < 1.3.5e / 1.3.6x < 1.3.6rc5 AllowChrootSymlinks bypass
  • NASL familySlackware Local Security Checks
    NASL idSLACKWARE_SSA_2017-112-03.NASL
    descriptionNew proftpd packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, 14.2, and -current to fix security issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id99598
    published2017-04-24
    reporterThis script is Copyright (C) 2017-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/99598
    titleSlackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / 14.2 / current : proftpd (SSA:2017-112-03)

References