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nessusThis script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.SUSE_SU-2017-0264-1.NASL
HistoryJan 24, 2017 - 12:00 a.m.

SUSE SLED12 / SLES12 Security Update : openssh (SUSE-SU-2017:0264-1)

2017-01-2400:00:00
This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
45

This update for openssh fixes several issues. These security issues were fixed :

  • CVE-2016-8858: The kex_input_kexinit function in kex.c allowed remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests (bsc#1005480).

  • CVE-2016-10012: The shared memory manager (associated with pre-authentication compression) did not ensure that a bounds check is enforced by all compilers, which might allowed local users to gain privileges by leveraging access to a sandboxed privilege-separation process, related to the m_zback and m_zlib data structures (bsc#1016370).

  • CVE-2016-10009: Untrusted search path vulnerability in ssh-agent.c allowed remote attackers to execute arbitrary local PKCS#11 modules by leveraging control over a forwarded agent-socket (bsc#1016366).

  • CVE-2016-10010: When forwarding unix domain sockets with privilege separation disabled, the resulting sockets have be created as ‘root’ instead of the authenticated user. Forwarding unix domain sockets without privilege separation enabled is now rejected.

  • CVE-2016-10011: authfile.c in sshd did not properly consider the effects of realloc on buffer contents, which might allowed local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process (bsc#1016369).

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.

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2017:0264-1.
# The text itself is copyright (C) SUSE.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(96718);
  script_version("3.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2016-10009", "CVE-2016-10010", "CVE-2016-10011", "CVE-2016-10012", "CVE-2016-8858");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : openssh (SUSE-SU-2017:0264-1)");
  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 openssh fixes several issues. These security issues
were fixed :

  - CVE-2016-8858: The kex_input_kexinit function in kex.c
    allowed remote attackers to cause a denial of service
    (memory consumption) by sending many duplicate KEXINIT
    requests (bsc#1005480).

  - CVE-2016-10012: The shared memory manager (associated
    with pre-authentication compression) did not ensure that
    a bounds check is enforced by all compilers, which might
    allowed local users to gain privileges by leveraging
    access to a sandboxed privilege-separation process,
    related to the m_zback and m_zlib data structures
    (bsc#1016370).

  - CVE-2016-10009: Untrusted search path vulnerability in
    ssh-agent.c allowed remote attackers to execute
    arbitrary local PKCS#11 modules by leveraging control
    over a forwarded agent-socket (bsc#1016366).

  - CVE-2016-10010: When forwarding unix domain sockets with
    privilege separation disabled, the resulting sockets
    have be created as 'root' instead of the authenticated
    user. Forwarding unix domain sockets without privilege
    separation enabled is now rejected.

  - CVE-2016-10011: authfile.c in sshd did not properly
    consider the effects of realloc on buffer contents,
    which might allowed local users to obtain sensitive
    private-key information by leveraging access to a
    privilege-separated child process (bsc#1016369).

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=1005480"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1005893"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1006221"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1016366"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1016368"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1016369"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1016370"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-10009/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-10010/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-10011/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-10012/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-8858/"
  );
  # https://www.suse.com/support/update/announcement/2017/suse-su-20170264-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?bec09483"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server for Raspberry Pi 12-SP2:zypper in -t
patch SUSE-SLE-RPI-12-SP2-2017-138=1

SUSE Linux Enterprise Server 12-SP2:zypper in -t patch
SUSE-SLE-SERVER-12-SP2-2017-138=1

SUSE Linux Enterprise Desktop 12-SP2:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP2-2017-138=1

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  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:"vuln_publication_date", value:"2016/12/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/01/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/01/24");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2021 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);
if (cpu >!< "x86_64") audit(AUDIT_ARCH_NOT, "x86_64", cpu);


sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(2)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP2", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(2)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP2", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-7.2p2-66.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-askpass-gnome-7.2p2-66.3")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-askpass-gnome-debuginfo-7.2p2-66.3")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-debuginfo-7.2p2-66.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-debugsource-7.2p2-66.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-fips-7.2p2-66.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-helpers-7.2p2-66.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"openssh-helpers-debuginfo-7.2p2-66.1")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"openssh-7.2p2-66.1")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"openssh-askpass-gnome-7.2p2-66.3")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"openssh-askpass-gnome-debuginfo-7.2p2-66.3")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"openssh-debuginfo-7.2p2-66.1")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"openssh-debugsource-7.2p2-66.1")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"openssh-helpers-7.2p2-66.1")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"openssh-helpers-debuginfo-7.2p2-66.1")) 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, "openssh");
}
VendorProductVersionCPE
novellsuse_linuxopensshp-cpe:/a:novell:suse_linux:openssh
novellsuse_linuxopenssh-askpass-gnomep-cpe:/a:novell:suse_linux:openssh-askpass-gnome
novellsuse_linuxopenssh-askpass-gnome-debuginfop-cpe:/a:novell:suse_linux:openssh-askpass-gnome-debuginfo
novellsuse_linuxopenssh-debuginfop-cpe:/a:novell:suse_linux:openssh-debuginfo
novellsuse_linuxopenssh-debugsourcep-cpe:/a:novell:suse_linux:openssh-debugsource
novellsuse_linuxopenssh-fipsp-cpe:/a:novell:suse_linux:openssh-fips
novellsuse_linuxopenssh-helpersp-cpe:/a:novell:suse_linux:openssh-helpers
novellsuse_linuxopenssh-helpers-debuginfop-cpe:/a:novell:suse_linux:openssh-helpers-debuginfo
novellsuse_linux12cpe:/o:novell:suse_linux:12