SUSE SLED12 / SLES12 Security Update : xrdp (SUSE-SU-2019:1847-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:1847-1.
# The text itself is copyright (C) SUSE.
#

include('compat.inc');

if (description)
{
  script_id(126738);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/19");

  script_cve_id("CVE-2013-1430", "CVE-2017-6967", "CVE-2017-16927");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : xrdp (SUSE-SU-2019:1847-1)");

  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 xrdp fixes the following issues :

These security issues were fixed :

CVE-2013-1430: When successfully logging in using RDP into an xrdp
session, the file ~/.vnc/sesman_${username}_passwd was created. Its
content was the equivalent of the user's cleartext password, DES
encrypted with a known key (bsc#1015567).

CVE-2017-16927: The scp_v0s_accept function in
sesman/libscp/libscp_v0.c in the session manager in xrdp through used
an untrusted integer as a write length, which could lead to a local
denial of service (bsc#1069591).

CVE-2017-6967: Fixed call of the PAM function auth_start_session().
This lead to to PAM session modules not being properly initialized,
with a potential consequence of incorrect configurations or elevation
of privileges, aka a pam_limits.so bypass (bsc#1029912).

The update package also includes non-security fixes. See advisory for
details.

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=1014524");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1015567");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1029912");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1060644");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1069591");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1090174");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1100453");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1101506");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2013-1430/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2017-16927/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2017-6967/");
  # https://www.suse.com/support/update/announcement/2019/suse-su-20191847-1/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d69cce7d");
  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-SP4-2019-1847=1

SUSE Linux Enterprise Desktop 12-SP4:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP4-2019-1847=1");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/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:N/AC:L/PR:N/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:"cvss_score_source", value:"CVE-2017-6967");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2013-1430");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/12/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xrdp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xrdp-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xrdp-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"SuSE Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP4", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP4", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"4", reference:"xrdp-0.9.0~git.1456906198.f422461-21.9.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"xrdp-debuginfo-0.9.0~git.1456906198.f422461-21.9.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"xrdp-debugsource-0.9.0~git.1456906198.f422461-21.9.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"xrdp-0.9.0~git.1456906198.f422461-21.9.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"xrdp-debuginfo-0.9.0~git.1456906198.f422461-21.9.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"xrdp-debugsource-0.9.0~git.1456906198.f422461-21.9.1")) 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, "xrdp");
}