CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
EPSS
Percentile
78.5%
Matthew Vernon discovered that OpenSSH did not correctly check SSHFP DNS records if a server presented an unacceptable host certificate. A malicious server could use this issue to disable SSHFP checking.
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.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-2164-1. The text
# itself is copyright (C) Canonical, Inc. See
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(73401);
script_version("1.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");
script_cve_id("CVE-2014-2653");
script_bugtraq_id(66459);
script_xref(name:"USN", value:"2164-1");
script_name(english:"Ubuntu 12.04 LTS / 12.10 / 13.10 : openssh vulnerability (USN-2164-1)");
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:
"Matthew Vernon discovered that OpenSSH did not correctly check SSHFP
DNS records if a server presented an unacceptable host certificate. A
malicious server could use this issue to disable SSHFP checking.
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/2164-1/"
);
script_set_attribute(
attribute:"solution",
value:"Update the affected openssh-client package."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
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:canonical:ubuntu_linux:openssh-client");
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:"cpe", value:"cpe:/o:canonical:ubuntu_linux:13.10");
script_set_attribute(attribute:"vuln_publication_date", value:"2014/03/27");
script_set_attribute(attribute:"patch_publication_date", value:"2014/04/07");
script_set_attribute(attribute:"plugin_publication_date", value:"2014/04/08");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"Ubuntu Security Notice (C) 2014-2020 Canonical, Inc. / NASL script (C) 2014-2019 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:"^(12\.04|12\.10|13\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 12.04 / 12.10 / 13.10", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);
flag = 0;
if (ubuntu_check(osver:"12.04", pkgname:"openssh-client", pkgver:"1:5.9p1-5ubuntu1.3")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"openssh-client", pkgver:"1:6.0p1-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"13.10", pkgname:"openssh-client", pkgver:"1:6.2p2-6ubuntu0.3")) 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, "openssh-client");
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | openssh-client | p-cpe:/a:canonical:ubuntu_linux:openssh-client |
canonical | ubuntu_linux | 12.04 | cpe:/o:canonical:ubuntu_linux:12.04:-:lts |
canonical | ubuntu_linux | 12.10 | cpe:/o:canonical:ubuntu_linux:12.10 |
canonical | ubuntu_linux | 13.10 | cpe:/o:canonical:ubuntu_linux:13.10 |