CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS
Percentile
82.9%
The libxml2 library is a development toolbox providing the implementation of various XML standards.
It was found that the hashing routine used by libxml2 arrays was susceptible to predictable hash collisions. Sending a specially crafted message to an XML service could result in longer processing time, which could lead to a denial of service. To mitigate this issue, randomization has been added to the hashing function to reduce the chance of an attacker successfully causing intentional collisions.
(CVE-2012-0841)
All users of libxml2 are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. The desktop must be restarted (log out, then log back in) for this update to take effect.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(61268);
script_version("1.14");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2012-0841");
script_name(english:"Scientific Linux Security Update : libxml2 on SL5.x, SL6.x i386/x86_64 (20120221)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:
"The remote Scientific Linux host is missing one or more security
updates."
);
script_set_attribute(
attribute:"description",
value:
"The libxml2 library is a development toolbox providing the
implementation of various XML standards.
It was found that the hashing routine used by libxml2 arrays was
susceptible to predictable hash collisions. Sending a specially
crafted message to an XML service could result in longer processing
time, which could lead to a denial of service. To mitigate this issue,
randomization has been added to the hashing function to reduce the
chance of an attacker successfully causing intentional collisions.
(CVE-2012-0841)
All users of libxml2 are advised to upgrade to these updated packages,
which contain a backported patch to correct this issue. The desktop
must be restarted (log out, then log back in) for this update to take
effect."
);
# https://listserv.fnal.gov/scripts/wa.exe?A2=ind1203&L=scientific-linux-errata&T=0&P=422
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?5eeeec98"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:fermilab:scientific_linux:libxml2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:libxml2-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:libxml2-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:libxml2-python");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:libxml2-static");
script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");
script_set_attribute(attribute:"vuln_publication_date", value:"2012/12/21");
script_set_attribute(attribute:"patch_publication_date", value:"2012/02/21");
script_set_attribute(attribute:"plugin_publication_date", value:"2012/08/01");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2012-2021 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("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) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 6.x", "Scientific Linux " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);
flag = 0;
if (rpm_check(release:"SL5", reference:"libxml2-2.6.26-2.1.15.el5_8.2")) flag++;
if (rpm_check(release:"SL5", reference:"libxml2-debuginfo-2.6.26-2.1.15.el5_8.2")) flag++;
if (rpm_check(release:"SL5", reference:"libxml2-devel-2.6.26-2.1.15.el5_8.2")) flag++;
if (rpm_check(release:"SL5", reference:"libxml2-python-2.6.26-2.1.15.el5_8.2")) flag++;
if (rpm_check(release:"SL6", reference:"libxml2-2.7.6-4.el6_2.4")) flag++;
if (rpm_check(release:"SL6", reference:"libxml2-debuginfo-2.7.6-4.el6_2.4")) flag++;
if (rpm_check(release:"SL6", reference:"libxml2-devel-2.7.6-4.el6_2.4")) flag++;
if (rpm_check(release:"SL6", reference:"libxml2-python-2.7.6-4.el6_2.4")) flag++;
if (rpm_check(release:"SL6", reference:"libxml2-static-2.7.6-4.el6_2.4")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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, "libxml2 / libxml2-debuginfo / libxml2-devel / libxml2-python / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
fermilab | scientific_linux | x-cpe:/o:fermilab:scientific_linux | |
fermilab | scientific_linux | libxml2-static | p-cpe:/a:fermilab:scientific_linux:libxml2-static |
fermilab | scientific_linux | libxml2-devel | p-cpe:/a:fermilab:scientific_linux:libxml2-devel |
fermilab | scientific_linux | libxml2 | p-cpe:/a:fermilab:scientific_linux:libxml2 |
fermilab | scientific_linux | libxml2-debuginfo | p-cpe:/a:fermilab:scientific_linux:libxml2-debuginfo |
fermilab | scientific_linux | libxml2-python | p-cpe:/a:fermilab:scientific_linux:libxml2-python |