SUSE SLES12 Security Update : openssh (SUSE-SU-2019:0941-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:0941-1.
# The text itself is copyright (C) SUSE.
#

include('compat.inc');

if (description)
{
  script_id(124057);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/20");

  script_cve_id("CVE-2019-6109", "CVE-2019-6111");

  script_name(english:"SUSE SLES12 Security Update : openssh (SUSE-SU-2019:0941-1)");

  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 openssh fixes the following issues :

Security vulnerabilities addressed :

CVE-2019-6109: Fixed an character encoding issue in the progress
display of the scp client that could be used to manipulate client
output, allowing for spoofing during file transfers (bsc#1121816).

CVE-2019-6111: Properly validate object names received by the scp
client to prevent arbitrary file overwrites when interacting with a
malicious SSH server (bsc#1121821).

Other issues fixed: Fixed two race conditions in sshd relating to
SIGHUP (bsc#1119183).

Returned proper reason for port forwarding failures (bsc#1090671).

Fixed SSHD termination of multichannel sessions with non-root users
(bsc#1115550).

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=1090671");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1115550");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1119183");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121816");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121821");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-6109/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-6111/");
  # https://www.suse.com/support/update/announcement/2019/suse-su-20190941-1/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?acfdd1b5");
  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 for SAP 12-SP1:zypper in -t patch
SUSE-SLE-SAP-12-SP1-2019-941=1

SUSE Linux Enterprise Server 12-SP1-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-SP1-2019-941=1

SUSE Linux Enterprise Server 12-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-2019-941=1");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-6111");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2019-6109");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-askpass-gnome");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-askpass-gnome-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-fips");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-helpers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-helpers-debuginfo");
  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:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE 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:"^(0|1)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP0/1", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"1", reference:"openssh-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"openssh-askpass-gnome-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"openssh-askpass-gnome-debuginfo-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"openssh-debuginfo-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"openssh-debugsource-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"openssh-fips-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"openssh-helpers-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"openssh-helpers-debuginfo-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"openssh-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"openssh-askpass-gnome-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"openssh-askpass-gnome-debuginfo-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"openssh-debuginfo-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"openssh-debugsource-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"openssh-fips-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"openssh-helpers-6.6p1-54.32.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"openssh-helpers-debuginfo-6.6p1-54.32.1")) flag++;


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