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SUSE SLED11 / SLES11 Security Update : libtasn1 (SUSE-SU-2015:0901-1)

2015-05-20T00:00:00
ID SUSE_SU-2015-0901-1.NASL
Type nessus
Reporter Tenable
Modified 2018-07-31T00:00:00

Description

The ASN.1 parsing library libtasn1 was updated to fix one memory handling issue :

CVE-2015-2806: A stack-based buffer overflow in libtasn1 allowed remote attackers to have unspecified impact via unknown vectors.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 SUSE update advisory SUSE-SU-2015:0901-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(83727);
  script_version("1.6");
  script_cvs_date("Date: 2018/07/31 17:27:54");

  script_cve_id("CVE-2015-2806");
  script_bugtraq_id(73436);

  script_name(english:"SUSE SLED11 / SLES11 Security Update : libtasn1 (SUSE-SU-2015:0901-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The ASN.1 parsing library libtasn1 was updated to fix one memory
handling issue :

CVE-2015-2806: A stack-based buffer overflow in libtasn1 allowed
remote attackers to have unspecified impact via unknown vectors.

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE 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://bugzilla.suse.com/924828"
  );
  # https://download.suse.com/patch/finder/?keywords=a6116d09000e5a9dea5b5ce0264d3dce
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?02e1a98f"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2015-2806.html"
  );
  # https://www.suse.com/support/update/announcement/2015/suse-su-20150901-1.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?b29b115e"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Software Development Kit 11 SP3 :

zypper in -t patch sdksp3-libtasn1=10659

SUSE Linux Enterprise Server 11 SP3 for VMware :

zypper in -t patch slessp3-libtasn1=10659

SUSE Linux Enterprise Server 11 SP3 :

zypper in -t patch slessp3-libtasn1=10659

SUSE Linux Enterprise Desktop 11 SP3 :

zypper in -t patch sledsp3-libtasn1=10659

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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:novell:suse_linux:libtasn1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libtasn1-3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");

  script_set_attribute(attribute:"patch_publication_date", value:"2015/05/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/05/20");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2018 Tenable Network Security, Inc.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/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/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = eregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! ereg(pattern:"^(SLED11|SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED11 / SLES11", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES11" && (! ereg(pattern:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP3", os_ver + " SP" + sp);
if (os_ver == "SLED11" && (! ereg(pattern:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLED11 SP3", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES11", sp:"3", cpu:"x86_64", reference:"libtasn1-3-32bit-1.5-1.30.1")) flag++;
if (rpm_check(release:"SLES11", sp:"3", cpu:"s390x", reference:"libtasn1-3-32bit-1.5-1.30.1")) flag++;
if (rpm_check(release:"SLES11", sp:"3", reference:"libtasn1-1.5-1.30.1")) flag++;
if (rpm_check(release:"SLES11", sp:"3", reference:"libtasn1-3-1.5-1.30.1")) flag++;
if (rpm_check(release:"SLED11", sp:"3", cpu:"x86_64", reference:"libtasn1-1.5-1.30.1")) flag++;
if (rpm_check(release:"SLED11", sp:"3", cpu:"x86_64", reference:"libtasn1-3-1.5-1.30.1")) flag++;
if (rpm_check(release:"SLED11", sp:"3", cpu:"x86_64", reference:"libtasn1-3-32bit-1.5-1.30.1")) flag++;
if (rpm_check(release:"SLED11", sp:"3", cpu:"i586", reference:"libtasn1-1.5-1.30.1")) flag++;
if (rpm_check(release:"SLED11", sp:"3", cpu:"i586", reference:"libtasn1-3-1.5-1.30.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libtasn1");
}
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