Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20130311)

2013-03-1300:00:00

www.tenable.com

CVSS2

6.9

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

EPSS

0.002

Percentile

55.9%

JSON

This update fixes the following security issues :

A flaw was found in the way file permission checks for the ‘/dev/cpu/[x]/msr’ files were performed in restricted root environments (for example, when using a capability-based security model). A local user with the ability to write to these files could use this flaw to escalate their privileges to kernel level, for example, by writing to the SYSENTER_EIP_MSR register.
(CVE-2013-0268, Important)
A race condition was found in the way the Linux kernel’s ptrace implementation handled PTRACE_SETREGS requests when the debuggee was woken due to a SIGKILL signal instead of being stopped. A local, unprivileged user could use this flaw to escalate their privileges.
(CVE-2013-0871, Important)

The system must be rebooted 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(65241);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2013-0268", "CVE-2013-0871");

  script_name(english:"Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20130311)");
  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:
"This update fixes the following security issues :

  - A flaw was found in the way file permission checks for
    the '/dev/cpu/[x]/msr' files were performed in
    restricted root environments (for example, when using a
    capability-based security model). A local user with the
    ability to write to these files could use this flaw to
    escalate their privileges to kernel level, for example,
    by writing to the SYSENTER_EIP_MSR register.
    (CVE-2013-0268, Important)

  - A race condition was found in the way the Linux kernel's
    ptrace implementation handled PTRACE_SETREGS requests
    when the debuggee was woken due to a SIGKILL signal
    instead of being stopped. A local, unprivileged user
    could use this flaw to escalate their privileges.
    (CVE-2013-0871, Important)

The system must be rebooted for this update to take effect."
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1303&L=scientific-linux-errata&T=0&P=4000
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?e43a5498"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-PAE");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-PAE-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-PAE-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debug-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-xen-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-xen-devel");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/02/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/03/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/03/13");
  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:"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:"^5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 5.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:"kernel-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", cpu:"i386", reference:"kernel-PAE-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", cpu:"i386", reference:"kernel-PAE-debuginfo-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", cpu:"i386", reference:"kernel-PAE-devel-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", reference:"kernel-debug-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", reference:"kernel-debug-debuginfo-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", reference:"kernel-debug-devel-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", reference:"kernel-debuginfo-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", reference:"kernel-debuginfo-common-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", reference:"kernel-devel-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", reference:"kernel-doc-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", reference:"kernel-headers-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", reference:"kernel-xen-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", reference:"kernel-xen-debuginfo-2.6.18-348.3.1.el5")) flag++;
if (rpm_check(release:"SL5", reference:"kernel-xen-devel-2.6.18-348.3.1.el5")) 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, "kernel / kernel-PAE / kernel-PAE-debuginfo / kernel-PAE-devel / etc");
}