SUSE SLED15 / SLES15 Security Update : openssh (SUSE-SU-2019:0496-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:0496-1.
# The text itself is copyright (C) SUSE.
#

include('compat.inc');

if (description)
{
  script_id(122473);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/23");

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

  script_name(english:"SUSE SLED15 / SLES15 Security Update : openssh (SUSE-SU-2019:0496-1)");

  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 bug fixes and changes: Handle brace expansion in scp when
checking that filenames sent by the server side match what the client
requested (bsc#1125687)

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=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://bugzilla.suse.com/show_bug.cgi?id=1125687");
  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-20190496-1/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?60f8713c");
  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 Server Applications 15:zypper in -t
patch SUSE-SLE-Module-Server-Applications-15-2019-496=1

SUSE Linux Enterprise Module for Open Buildservice Development Tools
15:zypper in -t patch
SUSE-SLE-Module-Development-Tools-OBS-15-2019-496=1

SUSE Linux Enterprise Module for Desktop Applications 15:zypper in -t
patch SUSE-SLE-Module-Desktop-Applications-15-2019-496=1

SUSE Linux Enterprise Module for Basesystem 15:zypper in -t patch
SUSE-SLE-Module-Basesystem-15-2019-496=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:"2019/02/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/27");

  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-cavs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openssh-cavs-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:15");
  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:"^(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:"openssh-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"openssh-askpass-gnome-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"openssh-askpass-gnome-debuginfo-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"openssh-cavs-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"openssh-cavs-debuginfo-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"openssh-debuginfo-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"openssh-debugsource-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"openssh-fips-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"openssh-helpers-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"openssh-helpers-debuginfo-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"openssh-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"openssh-askpass-gnome-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"openssh-askpass-gnome-debuginfo-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"openssh-cavs-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"openssh-cavs-debuginfo-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"openssh-debuginfo-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"openssh-debugsource-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"openssh-helpers-7.6p1-9.23.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"openssh-helpers-debuginfo-7.6p1-9.23.1")) 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");
}