SUSE SLES12 Security Update : apache2 (SUSE-SU-2018:0879-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:0879-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(108876);
  script_version("1.9");
  script_cvs_date("Date: 2019/09/10 13:51:47");

  script_cve_id("CVE-2017-15710", "CVE-2017-15715", "CVE-2018-1283", "CVE-2018-1301", "CVE-2018-1303", "CVE-2018-1312");

  script_name(english:"SUSE SLES12 Security Update : apache2 (SUSE-SU-2018:0879-1)");
  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 apache2 fixes the following issues :

  - CVE-2018-1283: when mod_session is configured to forward
    its session data to CGI applications (SessionEnv on, not
    the default), a remote user may influence their content
    by using a \'Session\' header leading to unexpected
    behavior [bsc#1086814].

  - CVE-2018-1301: due to an out of bound access after a
    size limit being reached by reading the HTTP header, a
    specially crafted request could lead to remote denial of
    service. [bsc#1086817]

  - CVE-2018-1303: a specially crafted HTTP request header
    could lead to crash due to an out of bound read while
    preparing data to be cached in shared
    memory.[bsc#1086813]

  - CVE-2017-15715: a regular expression could match '$' to
    a newline character in a malicious filename, rather than
    matching only the end of the filename. leading to
    corruption of uploaded files.[bsc#1086774]

  - CVE-2018-1312: when generating an HTTP Digest
    authentication challenge, the nonce sent to prevent
    reply attacks was not correctly generated using a
    pseudo-random seed. In a cluster of servers using a
    common Digest authentication configuration, HTTP
    requests could be replayed across servers by an attacker
    without detection. [bsc#1086775]

  - CVE-2017-15710: mod_authnz_ldap, if configured with
    AuthLDAPCharsetConfig, uses the Accept-Language header
    value to lookup the right charset encoding when
    verifying the user's credentials. If the header value is
    not present in the charset conversion table, a fallback
    mechanism is used to truncate it to a two characters
    value to allow a quick retry (for example, 'en-US' is
    truncated to 'en'). A header value of less than two
    characters forces an out of bound write of one NUL byte
    to a memory location that is not part of the string. In
    the worst case, quite unlikely, the process would crash
    which could be used as a Denial of Service attack. In
    the more likely case, this memory is already reserved
    for future use and the issue has no effect at all.
    [bsc#1086820]

  - gensslcert: fall back to 'localhost' as hostname
    [bsc#1057406]

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=1057406"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1086774"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1086775"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1086813"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1086814"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1086817"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1086820"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15710/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15715/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-1283/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-1301/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-1303/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-1312/"
  );
  # https://www.suse.com/support/update/announcement/2018/suse-su-20180879-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?5d1a9069"
  );
  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 OpenStack Cloud 6:zypper in -t patch
SUSE-OpenStack-Cloud-6-2018-593=1

SUSE Linux Enterprise Server for SAP 12-SP1:zypper in -t patch
SUSE-SLE-SAP-12-SP1-2018-593=1

SUSE Linux Enterprise Server 12-SP1-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-SP1-2018-593=1"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:apache2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:apache2-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:apache2-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:apache2-example-pages");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:apache2-prefork");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:apache2-prefork-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:apache2-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:apache2-utils-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:apache2-worker");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:apache2-worker-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/04/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/06");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 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:"^(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:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP1", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"1", reference:"apache2-2.4.16-20.16.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"apache2-debuginfo-2.4.16-20.16.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"apache2-debugsource-2.4.16-20.16.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"apache2-example-pages-2.4.16-20.16.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"apache2-prefork-2.4.16-20.16.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"apache2-prefork-debuginfo-2.4.16-20.16.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"apache2-utils-2.4.16-20.16.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"apache2-utils-debuginfo-2.4.16-20.16.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"apache2-worker-2.4.16-20.16.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"apache2-worker-debuginfo-2.4.16-20.16.1")) 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, "apache2");
}