Vulnerabilities > CVE-2013-0176 - Resource Management Errors vulnerability in Libssh

047910
CVSS 4.3 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
libssh
CWE-399
nessus
NVD
Published: 2013-02-05
Updated: 2017-08-29

Summary

The publickey_from_privatekey function in libssh before 0.5.4, when no algorithm is matched during negotiations, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a "Client: Diffie-Hellman Key Exchange Init" packet.

Vulnerable Configurations

Part Description Count
Application
Libssh
7

Common Weakness Enumeration (CWE)

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2013-1422.NASL
    descriptionFixed NULL dereference leads to denial of service - CVE-2013-0176, several NULL pointer dereferences in SSHv1, a free crash bug in options parsing. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-03-17
    modified2013-02-04
    plugin id64416
    published2013-02-04
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/64416
    titleFedora 17 : libssh-0.5.4-1.fc17 (2013-1422)
    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 2013-1422.
#

include("compat.inc");

if (description)
{
  script_id(64416);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2013-0176");
  script_xref(name:"FEDORA", value:"2013-1422");

  script_name(english:"Fedora 17 : libssh-0.5.4-1.fc17 (2013-1422)");
  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:
"Fixed NULL dereference leads to denial of service - CVE-2013-0176,
several NULL pointer dereferences in SSHv1, a free crash bug in
options parsing.

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora 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.redhat.com/show_bug.cgi?id=894407"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2013-February/098065.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?88ff6d65"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libssh package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:libssh");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:17");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/01/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/02/04");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2020 Tenable Network Security, Inc.");
  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 = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^17([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 17.x", "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:"FC17", reference:"libssh-0.5.4-1.fc17")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libssh");
}
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2013-1407.NASL
    descriptionFixed NULL dereference leads to denial of service - CVE-2013-0176, several NULL pointer dereferences in SSHv1, a free crash bug in options parsing. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-03-17
    modified2013-02-04
    plugin id64414
    published2013-02-04
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/64414
    titleFedora 18 : libssh-0.5.4-1.fc18 (2013-1407)
    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 2013-1407.
#

include("compat.inc");

if (description)
{
  script_id(64414);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2013-0176");
  script_xref(name:"FEDORA", value:"2013-1407");

  script_name(english:"Fedora 18 : libssh-0.5.4-1.fc18 (2013-1407)");
  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:
"Fixed NULL dereference leads to denial of service - CVE-2013-0176,
several NULL pointer dereferences in SSHv1, a free crash bug in
options parsing.

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora 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.redhat.com/show_bug.cgi?id=894407"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2013-February/098094.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?b3e54893"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libssh package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:libssh");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:18");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/01/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/02/04");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2020 Tenable Network Security, Inc.");
  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 = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^18([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 18.x", "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:"FC18", reference:"libssh-0.5.4-1.fc18")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libssh");
}
  • NASL familySlackware Local Security Checks
    NASL idSLACKWARE_SSA_2013-087-01.NASL
    descriptionNew libssh packages are available for Slackware 14.0, and -current to fix a security issue.
    last seen2020-06-01
    modified2020-06-02
    plugin id65724
    published2013-03-29
    reporterThis script is Copyright (C) 2013 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/65724
    titleSlackware 14.0 / current : libssh (SSA:2013-087-01)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Slackware Security Advisory 2013-087-01. The text 
# itself is copyright (C) Slackware Linux, Inc.
#

include("compat.inc");

if (description)
{
  script_id(65724);
  script_version("$Revision: 1.3 $");
  script_cvs_date("$Date: 2013/06/01 00:44:11 $");

  script_cve_id("CVE-2013-0176");
  script_bugtraq_id(57571);
  script_xref(name:"SSA", value:"2013-087-01");

  script_name(english:"Slackware 14.0 / current : libssh (SSA:2013-087-01)");
  script_summary(english:"Checks for updated package in /var/log/packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Slackware host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"New libssh packages are available for Slackware 14.0, and -current to
fix a security issue."
  );
  # http://www.slackware.com/security/viewer.php?l=slackware-security&y=2013&m=slackware-security.339814
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?a55e2250"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libssh package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:slackware:slackware_linux:libssh");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/03/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/03/29");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013 Tenable Network Security, Inc.");
  script_family(english:"Slackware Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Slackware/release", "Host/Slackware/packages");

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Slackware/release")) audit(AUDIT_OS_NOT, "Slackware");
if (!get_kb_item("Host/Slackware/packages")) 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, "Slackware", cpu);


flag = 0;
if (slackware_check(osver:"14.0", pkgname:"libssh", pkgver:"0.5.4", pkgarch:"i486", pkgnum:"1_slack14.0")) flag++;
if (slackware_check(osver:"14.0", arch:"x86_64", pkgname:"libssh", pkgver:"0.5.4", pkgarch:"x86_64", pkgnum:"1_slack14.0")) flag++;

if (slackware_check(osver:"current", pkgname:"libssh", pkgver:"0.5.4", pkgarch:"i486", pkgnum:"1")) flag++;
if (slackware_check(osver:"current", arch:"x86_64", pkgname:"libssh", pkgver:"0.5.4", pkgarch:"x86_64", pkgnum:"1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:slackware_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyMandriva Local Security Checks
    NASL idMANDRIVA_MDVSA-2013-009.NASL
    descriptionA vulnerability has been found and corrected in libssh : The publickey_from_privatekey function in libssh before 0.5.4, when no algorithm is matched during negotiations, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a Client: Diffie-Hellman Key Exchange Init packet (CVE-2013-0176). The updated packages have been upgraded to the 0.5.4 version which is not affected by this issue.
    last seen2020-06-01
    modified2020-06-02
    plugin id64551
    published2013-02-11
    reporterThis script is Copyright (C) 2013-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/64551
    titleMandriva Linux Security Advisory : libssh (MDVSA-2013:009)
    code
    #%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Mandriva Linux Security Advisory MDVSA-2013:009. 
# The text itself is copyright (C) Mandriva S.A.
#

include("compat.inc");

if (description)
{
  script_id(64551);
  script_version("1.5");
  script_cvs_date("Date: 2019/08/02 13:32:54");

  script_cve_id("CVE-2013-0176");
  script_bugtraq_id(57571);
  script_xref(name:"MDVSA", value:"2013:009");

  script_name(english:"Mandriva Linux Security Advisory : libssh (MDVSA-2013:009)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Mandriva Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A vulnerability has been found and corrected in libssh :

The publickey_from_privatekey function in libssh before 0.5.4, when no
algorithm is matched during negotiations, allows remote attackers to
cause a denial of service (NULL pointer dereference and crash) via a
Client: Diffie-Hellman Key Exchange Init packet (CVE-2013-0176).

The updated packages have been upgraded to the 0.5.4 version which is
not affected by this issue."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.libssh.org/2013/01/22/libssh-0-5-4-security-release/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64ssh-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64ssh4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libssh-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libssh4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2011");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/02/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/02/11");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2019 Tenable Network Security, Inc.");
  script_family(english:"Mandriva Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/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);
if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux");
if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu);


flag = 0;
if (rpm_check(release:"MDK2011", cpu:"x86_64", reference:"lib64ssh-devel-0.5.4-0.1-mdv2011.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2011", cpu:"x86_64", reference:"lib64ssh4-0.5.4-0.1-mdv2011.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2011", cpu:"i386", reference:"libssh-devel-0.5.4-0.1-mdv2011.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2011", cpu:"i386", reference:"libssh4-0.5.4-0.1-mdv2011.0", yank:"mdv")) 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 familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-1707-1.NASL
    descriptionYong Chuan Koh discovered that libssh incorrectly handled certain negotiation requests. A remote attacker could use this to cause libssh to crash, resulting in a denial of service. 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 id64285
    published2013-01-29
    reporterUbuntu Security Notice (C) 2013-2019 Canonical, Inc. / NASL script (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/64285
    titleUbuntu 10.04 LTS / 11.10 / 12.04 LTS / 12.10 : libssh vulnerability (USN-1707-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-1707-1. 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(64285);
  script_version("1.9");
  script_cvs_date("Date: 2019/09/19 12:54:28");

  script_cve_id("CVE-2013-0176");
  script_xref(name:"USN", value:"1707-1");

  script_name(english:"Ubuntu 10.04 LTS / 11.10 / 12.04 LTS / 12.10 : libssh vulnerability (USN-1707-1)");
  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:
"Yong Chuan Koh discovered that libssh incorrectly handled certain
negotiation requests. A remote attacker could use this to cause libssh
to crash, resulting in a denial of service.

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/1707-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libssh-4 package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libssh-4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:11.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:12.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:12.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/02/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/01/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/01/29");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2013-2019 Canonical, Inc. / NASL script (C) 2013-2019 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:"^(10\.04|11\.10|12\.04|12\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 10.04 / 11.10 / 12.04 / 12.10", "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:"10.04", pkgname:"libssh-4", pkgver:"0.4.2-1ubuntu1.2")) flag++;
if (ubuntu_check(osver:"11.10", pkgname:"libssh-4", pkgver:"0.5.2-1ubuntu0.11.10.2")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"libssh-4", pkgver:"0.5.2-1ubuntu0.12.04.2")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"libssh-4", pkgver:"0.5.2-1ubuntu0.12.10.2")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "libssh-4");
}
  • NASL familyMandriva Local Security Checks
    NASL idMANDRIVA_MDVSA-2013-045.NASL
    descriptionUpdated libssh packages fix security vulnerabilities : Multiple double free flaws, buffer overflow flaws, invalid free flaws, and improper overflow checks in libssh before 0.5.3 could enable a denial of service attack against libssh clients, or possibly arbitrary code execution (CVE-2012-4559, CVE-2012-4560, CVE-2012-4561 and CVE-2012-4562). Yong Chuan Koh discovered that libssh incorrectly handled certain negotiation requests. A remote attacker could use this to cause libssh to crash, resulting in a denial of service (CVE-2013-0176).
    last seen2020-06-01
    modified2020-06-02
    plugin id66059
    published2013-04-20
    reporterThis script is Copyright (C) 2013-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/66059
    titleMandriva Linux Security Advisory : libssh (MDVSA-2013:045)
    code
    #%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Mandriva Linux Security Advisory MDVSA-2013:045. 
# The text itself is copyright (C) Mandriva S.A.
#

include("compat.inc");

if (description)
{
  script_id(66059);
  script_version("1.6");
  script_cvs_date("Date: 2019/08/02 13:32:55");

  script_cve_id("CVE-2012-4559", "CVE-2012-4560", "CVE-2012-4561", "CVE-2012-4562", "CVE-2013-0176");
  script_bugtraq_id(56604, 57571);
  script_xref(name:"MDVSA", value:"2013:045");
  script_xref(name:"MGASA", value:"2012-0344");
  script_xref(name:"MGASA", value:"2013-0033");

  script_name(english:"Mandriva Linux Security Advisory : libssh (MDVSA-2013:045)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Mandriva Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated libssh packages fix security vulnerabilities :

Multiple double free flaws, buffer overflow flaws, invalid free flaws,
and improper overflow checks in libssh before 0.5.3 could enable a
denial of service attack against libssh clients, or possibly arbitrary
code execution (CVE-2012-4559, CVE-2012-4560, CVE-2012-4561 and
CVE-2012-4562).

Yong Chuan Koh discovered that libssh incorrectly handled certain
negotiation requests. A remote attacker could use this to cause libssh
to crash, resulting in a denial of service (CVE-2013-0176)."
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected lib64ssh-devel and / or lib64ssh4 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:ND/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64ssh-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64ssh4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:business_server:1");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/04/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/04/20");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2019 Tenable Network Security, Inc.");
  script_family(english:"Mandriva Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/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);
if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux");
if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu);


flag = 0;
if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"lib64ssh-devel-0.5.2-2.1.mbs1")) flag++;
if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"lib64ssh4-0.5.2-2.1.mbs1")) flag++;


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

References