SUSE SLED12 / SLES12 Security Update : bash (SUSE-SU-2016:2872-1) (Shellshock)

2016-11-23T00:00:00
ID SUSE_SU-2016-2872-1.NASL
Type nessus
Reporter This script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2016-11-23T00:00:00

Description

This update for bash fixes the following issues :

  • CVE-2016-7543: Local attackers could have executed arbitrary commands via specially crafted SHELLOPTS+PS4 variables (bsc#1001299)

  • CVE-2016-0634: Malicious hostnames could have allowed arbitrary command execution when $HOSTNAME was expanded in the prompt (bsc#1000396)

  • CVE-2014-6277: More troubles with functions (bsc#898812, bsc#1001759)

  • CVE-2014-6278: Code execution after original 6271 fix (bsc#898884)

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.

                                        
                                            #%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2016:2872-1.
# The text itself is copyright (C) SUSE.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(95282);
  script_version("3.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2014-6277", "CVE-2014-6278", "CVE-2016-0634", "CVE-2016-7543");
  script_bugtraq_id(70165, 70166);
  script_xref(name:"IAVA", value:"2014-A-0142");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : bash (SUSE-SU-2016:2872-1) (Shellshock)");
  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:
"This update for bash fixes the following issues :

  - CVE-2016-7543: Local attackers could have executed
    arbitrary commands via specially crafted SHELLOPTS+PS4
    variables (bsc#1001299)

  - CVE-2016-0634: Malicious hostnames could have allowed
    arbitrary command execution when $HOSTNAME was expanded
    in the prompt (bsc#1000396)

  - CVE-2014-6277: More troubles with functions (bsc#898812,
    bsc#1001759)

  - CVE-2014-6278: Code execution after original 6271 fix
    (bsc#898884)

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/show_bug.cgi?id=1000396"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1001299"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1001759"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=898812"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=898884"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2014-6277/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2014-6278/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-0634/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-7543/"
  );
  # https://www.suse.com/support/update/announcement/2016/suse-su-20162872-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?c2ca2949"
  );
  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 Workstation Extension 12-SP1:zypper in -t patch
SUSE-SLE-WE-12-SP1-2016-1681=1

SUSE Linux Enterprise Software Development Kit 12-SP1:zypper in -t
patch SUSE-SLE-SDK-12-SP1-2016-1681=1

SUSE Linux Enterprise Server 12-SP1:zypper in -t patch
SUSE-SLE-SERVER-12-SP1-2016-1681=1

SUSE Linux Enterprise Desktop 12-SP1:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP1-2016-1681=1

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:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC: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_core", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'CUPS Filter Bash Environment Variable Code Injection (Shellshock)');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:bash");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:bash-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:bash-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libreadline6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libreadline6-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/09/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/11/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/11/23");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  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 = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED12|SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED12 / SLES12", "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 == "SLES12" && (! preg(pattern:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP1", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP1", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"1", reference:"bash-4.2-82.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"bash-debuginfo-4.2-82.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"bash-debugsource-4.2-82.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"libreadline6-6.2-82.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"libreadline6-debuginfo-6.2-82.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"libreadline6-32bit-6.2-82.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"libreadline6-debuginfo-32bit-6.2-82.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"bash-4.2-82.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"bash-debuginfo-4.2-82.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"bash-debugsource-4.2-82.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"libreadline6-32bit-6.2-82.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"libreadline6-6.2-82.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"libreadline6-debuginfo-32bit-6.2-82.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"libreadline6-debuginfo-6.2-82.1")) 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, "bash");
}