SuSE 11.3 Security Update : bash (SAT Patch Number 9740)

2014-09-25T00:00:00
ID SUSE_11_BASH-140919.NASL
Type nessus
Reporter Tenable
Modified 2016-12-21T00:00:00

Description

bash has been updated to fix a critical security issue.

In some circumstances, the shell would evaluate shellcode in environment variables passed at startup time. This allowed code execution by local or remote attackers who could pass environment variables to bash scripts. (CVE-2014-6271)

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from SuSE 11 update information. The text itself is
# copyright (C) Novell, Inc.
#

if (NASL_LEVEL < 3000) exit(0);

include("compat.inc");

if (description)
{
  script_id(77850);
  script_version("$Revision: 1.11 $");
  script_cvs_date("$Date: 2016/12/21 20:21:19 $");

  script_cve_id("CVE-2014-6271");
  script_xref(name:"IAVA", value:"2014-A-0142");

  script_name(english:"SuSE 11.3 Security Update : bash (SAT Patch Number 9740)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SuSE 11 host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"bash has been updated to fix a critical security issue.

In some circumstances, the shell would evaluate shellcode in
environment variables passed at startup time. This allowed code
execution by local or remote attackers who could pass environment
variables to bash scripts. (CVE-2014-6271)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=896776"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2014-6271.html"
  );
  script_set_attribute(attribute:"solution", value:"Apply SAT patch number 9740.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Apache mod_cgi 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:11:bash");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:bash-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:libreadline5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:libreadline5-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:readline-doc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");

  script_set_attribute(attribute:"patch_publication_date", value:"2014/09/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/09/25");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2016 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)11") audit(AUDIT_OS_NOT, "SuSE 11");
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 11", cpu);

pl = get_kb_item("Host/SuSE/patchlevel");
if (isnull(pl) || int(pl) != 3) audit(AUDIT_OS_NOT, "SuSE 11.3");


flag = 0;
if (rpm_check(release:"SLED11", sp:3, cpu:"i586", reference:"bash-3.2-147.20.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"i586", reference:"bash-doc-3.2-147.20.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"i586", reference:"libreadline5-5.2-147.20.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"i586", reference:"readline-doc-5.2-147.20.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"bash-3.2-147.20.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"bash-doc-3.2-147.20.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"libreadline5-5.2-147.20.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"libreadline5-32bit-5.2-147.20.1")) flag++;
if (rpm_check(release:"SLED11", sp:3, cpu:"x86_64", reference:"readline-doc-5.2-147.20.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, reference:"bash-3.2-147.20.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, reference:"bash-doc-3.2-147.20.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, reference:"libreadline5-5.2-147.20.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, reference:"readline-doc-5.2-147.20.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"s390x", reference:"libreadline5-32bit-5.2-147.20.1")) flag++;
if (rpm_check(release:"SLES11", sp:3, cpu:"x86_64", reference:"libreadline5-32bit-5.2-147.20.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");