SUSE SLED12 / SLES12 Security Update : w3m (SUSE-SU-2019:0776-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:0776-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(123450);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/27");

  script_cve_id("CVE-2018-6196", "CVE-2018-6197", "CVE-2018-6198");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : w3m (SUSE-SU-2019:0776-1)");
  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 w3m fixes several issues.

These security issues were fixed :

CVE-2018-6196: Prevent infinite recursion in HTMLlineproc0 caused by
the feed_table_block_tag function which did not prevent a negative
indent value (bsc#1077559)

CVE-2018-6197: Prevent NULL pointer dereference in formUpdateBuffer
(bsc#1077568)

CVE-2018-6198: w3m did not properly handle temporary files when the
~/.w3m directory is unwritable, which allowed a local attacker to
craft a symlink attack to overwrite arbitrary files (bsc#1077572)

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=1077559"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1077568"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1077572"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-6196/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-6197/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-6198/"
  );
  # https://www.suse.com/support/update/announcement/2019/suse-su-20190776-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?62e3e297"
  );
  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 Server 12-SP4:zypper in -t patch
SUSE-SLE-SERVER-12-SP4-2019-776=1

SUSE Linux Enterprise Server 12-SP3:zypper in -t patch
SUSE-SLE-SERVER-12-SP3-2019-776=1

SUSE Linux Enterprise Desktop 12-SP4:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP4-2019-776=1

SUSE Linux Enterprise Desktop 12-SP3:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP3-2019-776=1"
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:N/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-6198");
  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:w3m");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:w3m-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:w3m-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/01/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/28");
  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:"^(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:"^(3|4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP3/4", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(3|4)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP3/4", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"4", reference:"w3m-0.5.3.git20161120-161.3.4")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"w3m-debuginfo-0.5.3.git20161120-161.3.4")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"w3m-debugsource-0.5.3.git20161120-161.3.4")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"w3m-0.5.3.git20161120-161.3.4")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"w3m-debuginfo-0.5.3.git20161120-161.3.4")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"w3m-debugsource-0.5.3.git20161120-161.3.4")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"w3m-0.5.3.git20161120-161.3.4")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"w3m-debuginfo-0.5.3.git20161120-161.3.4")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"w3m-debugsource-0.5.3.git20161120-161.3.4")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"w3m-0.5.3.git20161120-161.3.4")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"w3m-debuginfo-0.5.3.git20161120-161.3.4")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"w3m-debugsource-0.5.3.git20161120-161.3.4")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_note(port:0, extra:rpm_report_get());
  else security_note(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "w3m");
}