SUSE SLED15 / SLES15 Security Update : zsh (SUSE-SU-2018:1874-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:1874-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(120028);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/20");

  script_cve_id("CVE-2018-1071", "CVE-2018-1083", "CVE-2018-1100");

  script_name(english:"SUSE SLED15 / SLES15 Security Update : zsh (SUSE-SU-2018:1874-1)");
  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:
"This update for zsh to version 5.5 fixes the following issues:
Security issues fixed :

  - CVE-2018-1100: Fixes a buffer overflow in
    utils.c:checkmailpath() that can lead to local arbitrary
    code execution (bsc#1089030)

  - CVE-2018-1071: Fixed a stack-based buffer overflow in
    exec.c:hashcmd() (bsc#1084656)

  - CVE-2018-1083: Fixed a stack-based buffer overflow in
    gen_matches_files() at compctl.c (bsc#1087026)
    Non-security issues fixed :

  - The effect of the NO_INTERACTIVE_COMMENTS option extends
    into $(...) and `...` command substitutions when used on
    the command line.

  - The 'exec' and 'command' precommand modifiers, and
    options to them, are now parsed after parameter
    expansion.

  - Functions executed by ZLE widgets no longer have their
    standard input closed, but redirected from /dev/null
    instead.

  - There is an option WARN_NESTED_VAR, a companion to the
    existing WARN_CREATE_GLOBAL that causes a warning if a
    function updates a variable from an enclosing scope
    without using typeset -g.

  - zmodload now has an option -s to be silent on a failure
    to find a module but still print other errors.

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=1084656"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1087026"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1089030"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-1071/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-1083/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-1100/"
  );
  # https://www.suse.com/support/update/announcement/2018/suse-su-20181874-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?b9ebd4e0"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Module for Basesystem 15:zypper in -t patch
SUSE-SLE-Module-Basesystem-15-2018-1268=1"
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:zsh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:zsh-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:zsh-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/07/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/02");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 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:"^(SLED15|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED15 / SLES15", "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 == "SLES15" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLES15 SP0", os_ver + " SP" + sp);
if (os_ver == "SLED15" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLED15 SP0", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES15", sp:"0", reference:"zsh-5.5-3.3.15")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"zsh-debuginfo-5.5-3.3.15")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"zsh-debugsource-5.5-3.3.15")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"zsh-5.5-3.3.15")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"zsh-debuginfo-5.5-3.3.15")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"zsh-debugsource-5.5-3.3.15")) 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, "zsh");
}