4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.002 Low
EPSS
Percentile
59.2%
Scott Cantor discovered that libcurl incorrectly verified CN and SAN name fields when digital signature verification was disabled. When libcurl is being used in this uncommon way by specific applications, an attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications.
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.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-2048-1. 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(71244);
script_version("1.6");
script_cvs_date("Date: 2019/09/19 12:54:29");
script_cve_id("CVE-2013-4545");
script_bugtraq_id(63776);
script_xref(name:"USN", value:"2048-1");
script_name(english:"Ubuntu 10.04 LTS / 12.04 LTS / 12.10 / 13.04 / 13.10 : curl vulnerability (USN-2048-1)");
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:
"Scott Cantor discovered that libcurl incorrectly verified CN and SAN
name fields when digital signature verification was disabled. When
libcurl is being used in this uncommon way by specific applications,
an attacker could exploit this to perform a man in the middle attack
to view sensitive information or alter encrypted communications.
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/2048-1/"
);
script_set_attribute(
attribute:"solution",
value:"Update the affected libcurl3 package."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/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:libcurl3");
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: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:13.04");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:13.10");
script_set_attribute(attribute:"vuln_publication_date", value:"2013/11/23");
script_set_attribute(attribute:"patch_publication_date", value:"2013/12/05");
script_set_attribute(attribute:"plugin_publication_date", value:"2013/12/06");
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|12\.04|12\.10|13\.04|13\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 10.04 / 12.04 / 12.10 / 13.04 / 13.10", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);
flag = 0;
if (ubuntu_check(osver:"10.04", pkgname:"libcurl3", pkgver:"7.19.7-1ubuntu1.4")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"libcurl3", pkgver:"7.22.0-3ubuntu4.4")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"libcurl3", pkgver:"7.27.0-1ubuntu1.5")) flag++;
if (ubuntu_check(osver:"13.04", pkgname:"libcurl3", pkgver:"7.29.0-1ubuntu3.3")) flag++;
if (ubuntu_check(osver:"13.10", pkgname:"libcurl3", pkgver:"7.32.0-1ubuntu1.1")) 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, "libcurl3");
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | libcurl3 | p-cpe:/a:canonical:ubuntu_linux:libcurl3 |
canonical | ubuntu_linux | 10.04 | cpe:/o:canonical:ubuntu_linux:10.04:-:lts |
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 | 13.04 | cpe:/o:canonical:ubuntu_linux:13.04 |
canonical | ubuntu_linux | 13.10 | cpe:/o:canonical:ubuntu_linux:13.10 |