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
96.3%
Updated ruby packages that fix two security issues are now available for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks.
It was discovered that Ruby’s REXML library did not properly restrict XML entity expansion. An attacker could use this flaw to cause a denial of service by tricking a Ruby application using REXML to read text nodes from specially crafted XML content, which will result in REXML consuming large amounts of system memory. (CVE-2013-1821)
It was found that the RHSA-2011:0910 update did not correctly fix the CVE-2011-1005 issue, a flaw in the method for translating an exception message into a string in the Exception class. A remote attacker could use this flaw to bypass safe level 4 restrictions, allowing untrusted (tainted) code to modify arbitrary, trusted (untainted) strings, which safe level 4 restrictions would otherwise prevent. (CVE-2012-4481)
The CVE-2012-4481 issue was discovered by Vit Ondruch of Red Hat.
All users of Ruby are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2013:0612 and
# CentOS Errata and Security Advisory 2013:0612 respectively.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(65166);
script_version("1.13");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2012-4481", "CVE-2013-1821");
script_bugtraq_id(55813, 58141);
script_xref(name:"RHSA", value:"2013:0612");
script_name(english:"CentOS 6 : ruby (CESA-2013:0612)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote CentOS host is missing one or more security updates."
);
script_set_attribute(
attribute:"description",
value:
"Updated ruby packages that fix two security issues are now available
for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having
moderate security impact. Common Vulnerability Scoring System (CVSS)
base scores, which give detailed severity ratings, are available for
each vulnerability from the CVE links in the References section.
Ruby is an extensible, interpreted, object-oriented, scripting
language. It has features to process text files and to do system
management tasks.
It was discovered that Ruby's REXML library did not properly restrict
XML entity expansion. An attacker could use this flaw to cause a
denial of service by tricking a Ruby application using REXML to read
text nodes from specially crafted XML content, which will result in
REXML consuming large amounts of system memory. (CVE-2013-1821)
It was found that the RHSA-2011:0910 update did not correctly fix the
CVE-2011-1005 issue, a flaw in the method for translating an exception
message into a string in the Exception class. A remote attacker could
use this flaw to bypass safe level 4 restrictions, allowing untrusted
(tainted) code to modify arbitrary, trusted (untainted) strings, which
safe level 4 restrictions would otherwise prevent. (CVE-2012-4481)
The CVE-2012-4481 issue was discovered by Vit Ondruch of Red Hat.
All users of Ruby are advised to upgrade to these updated packages,
which contain backported patches to resolve these issues."
);
# https://lists.centos.org/pipermail/centos-announce/2013-March/019633.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?c2063ca6"
);
script_set_attribute(attribute:"solution", value:"Update the affected ruby packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2013-1821");
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:centos:centos:ruby");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ruby-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ruby-docs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ruby-irb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ruby-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ruby-rdoc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ruby-ri");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ruby-static");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ruby-tcltk");
script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:6");
script_set_attribute(attribute:"vuln_publication_date", value:"2013/04/09");
script_set_attribute(attribute:"patch_publication_date", value:"2013/03/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2013/03/10");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2013-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"CentOS Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/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/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 6.x", "CentOS " + os_ver);
if (!get_kb_item("Host/CentOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "CentOS", cpu);
flag = 0;
if (rpm_check(release:"CentOS-6", reference:"ruby-1.8.7.352-10.el6_4")) flag++;
if (rpm_check(release:"CentOS-6", reference:"ruby-devel-1.8.7.352-10.el6_4")) flag++;
if (rpm_check(release:"CentOS-6", reference:"ruby-docs-1.8.7.352-10.el6_4")) flag++;
if (rpm_check(release:"CentOS-6", reference:"ruby-irb-1.8.7.352-10.el6_4")) flag++;
if (rpm_check(release:"CentOS-6", reference:"ruby-libs-1.8.7.352-10.el6_4")) flag++;
if (rpm_check(release:"CentOS-6", reference:"ruby-rdoc-1.8.7.352-10.el6_4")) flag++;
if (rpm_check(release:"CentOS-6", reference:"ruby-ri-1.8.7.352-10.el6_4")) flag++;
if (rpm_check(release:"CentOS-6", reference:"ruby-static-1.8.7.352-10.el6_4")) flag++;
if (rpm_check(release:"CentOS-6", reference:"ruby-tcltk-1.8.7.352-10.el6_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, "ruby / ruby-devel / ruby-docs / ruby-irb / ruby-libs / ruby-rdoc / etc");
}