Oracle Linux 6 : systemtap (ELSA-2011-1088)

2013-07-12T00:00:00
ID ORACLELINUX_ELSA-2011-1088.NASL
Type nessus
Reporter Tenable
Modified 2015-12-01T00:00:00

Description

From Red Hat Security Advisory 2011:1088 :

Updated systemtap 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.

SystemTap is an instrumentation system for systems running the Linux kernel. The system allows developers to write scripts to collect data on the operation of the system.

It was found that SystemTap did not perform proper module path sanity checking if a user specified a custom path to the uprobes module, used when performing user-space probing ('staprun -u'). A local user who is a member of the stapusr group could use this flaw to bypass intended module-loading restrictions, allowing them to escalate their privileges by loading an arbitrary, unsigned module. (CVE-2011-2502)

A race condition flaw was found in the way the staprun utility performed module loading. A local user who is a member of the stapusr group could use this flaw to modify a signed module while it is being loaded, allowing them to escalate their privileges. (CVE-2011-2503)

SystemTap users should upgrade to these updated packages, which contain backported patches to correct these issues.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2011:1088 and 
# Oracle Linux Security Advisory ELSA-2011-1088 respectively.
#

include("compat.inc");

if (description)
{
  script_id(68312);
  script_version("$Revision: 1.3 $");
  script_cvs_date("$Date: 2015/12/01 16:58:00 $");

  script_cve_id("CVE-2011-2502", "CVE-2011-2503");
  script_xref(name:"RHSA", value:"2011:1088");

  script_name(english:"Oracle Linux 6 : systemtap (ELSA-2011-1088)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Oracle Linux host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"From Red Hat Security Advisory 2011:1088 :

Updated systemtap 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.

SystemTap is an instrumentation system for systems running the Linux
kernel. The system allows developers to write scripts to collect data
on the operation of the system.

It was found that SystemTap did not perform proper module path sanity
checking if a user specified a custom path to the uprobes module, used
when performing user-space probing ('staprun -u'). A local user who is
a member of the stapusr group could use this flaw to bypass intended
module-loading restrictions, allowing them to escalate their
privileges by loading an arbitrary, unsigned module. (CVE-2011-2502)

A race condition flaw was found in the way the staprun utility
performed module loading. A local user who is a member of the stapusr
group could use this flaw to modify a signed module while it is being
loaded, allowing them to escalate their privileges. (CVE-2011-2503)

SystemTap users should upgrade to these updated packages, which
contain backported patches to correct these issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2011-July/002245.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected systemtap packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:systemtap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:systemtap-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:systemtap-grapher");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:systemtap-initscript");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:systemtap-runtime");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:systemtap-sdt-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:systemtap-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:systemtap-testsuite");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/07/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/07/12");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2015 Tenable Network Security, Inc.");
  script_family(english:"Oracle Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/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);
if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux");
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !eregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux");
os_ver = eregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux");
os_ver = os_ver[1];
if (! ereg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 6", "Oracle 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 ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu);

flag = 0;
if (rpm_check(release:"EL6", reference:"systemtap-1.4-6.0.1.el6_1.2")) flag++;
if (rpm_check(release:"EL6", reference:"systemtap-client-1.4-6.0.1.el6_1.2")) flag++;
if (rpm_check(release:"EL6", reference:"systemtap-grapher-1.4-6.0.1.el6_1.2")) flag++;
if (rpm_check(release:"EL6", reference:"systemtap-initscript-1.4-6.0.1.el6_1.2")) flag++;
if (rpm_check(release:"EL6", reference:"systemtap-runtime-1.4-6.0.1.el6_1.2")) flag++;
if (rpm_check(release:"EL6", reference:"systemtap-sdt-devel-1.4-6.0.1.el6_1.2")) flag++;
if (rpm_check(release:"EL6", reference:"systemtap-server-1.4-6.0.1.el6_1.2")) flag++;
if (rpm_check(release:"EL6", reference:"systemtap-testsuite-1.4-6.0.1.el6_1.2")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "systemtap / systemtap-client / systemtap-grapher / etc");
}