Amazon Linux 2 : httpd (ALAS-2019-1189)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALAS-2019-1189.
#

include("compat.inc");

if (description)
{
  script_id(124125);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/06");

  script_cve_id("CVE-2019-0196", "CVE-2019-0197", "CVE-2019-0211", "CVE-2019-0215", "CVE-2019-0217", "CVE-2019-0220");
  script_xref(name:"ALAS", value:"2019-1189");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/05/03");
  script_xref(name:"CEA-ID", value:"CEA-2019-0203");

  script_name(english:"Amazon Linux 2 : httpd (ALAS-2019-1189)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote Amazon Linux 2 host is missing a security update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"In Apache HTTP Server with MPM event, worker or prefork, code
executing in less-privileged child processes or threads (including
scripts executed by an in-process scripting interpreter) could execute
arbitrary code with the privileges of the parent process (usually
root) by manipulating the scoreboard. (CVE-2019-0211)

mod_http2: read-after-free on a string compare (CVE-2019-0196)

mod_http2: possible crash on late upgrade (CVE-2019-0197)

httpd: URL normalization inconsistency (CVE-2019-0220)

In Apache HTTP Server 2.4 releases 2.4.37 and 2.4.38, a bug in mod_ssl
when using per-location client certificate verification with TLSv1.3
allowed a client to bypass configured access control
restrictions.(CVE-2019-0215)

A race condition was found in mod_auth_digest when the web server was
running in a threaded MPM configuration. It could allow a user with
valid credentials to authenticate using another username, bypassing
configured access control restrictions.(CVE-2019-0217)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://alas.aws.amazon.com/AL2/ALAS-2019-1189.html"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Run 'yum update httpd' to update your system."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/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:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-0211");
  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:amazon:linux:httpd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd-filesystem");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd-manual");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:httpd-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod_ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod_md");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod_proxy_html");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod_session");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:mod_ssl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/18");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Amazon Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/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/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "2")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (rpm_check(release:"AL2", reference:"httpd-2.4.39-1.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"httpd-debuginfo-2.4.39-1.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"httpd-devel-2.4.39-1.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"httpd-filesystem-2.4.39-1.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"httpd-manual-2.4.39-1.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"httpd-tools-2.4.39-1.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"mod_ldap-2.4.39-1.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"mod_md-2.4.39-1.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"mod_proxy_html-2.4.39-1.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"mod_session-2.4.39-1.amzn2.0.1")) flag++;
if (rpm_check(release:"AL2", reference:"mod_ssl-2.4.39-1.amzn2.0.1")) 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, "httpd / httpd-debuginfo / httpd-devel / httpd-filesystem / etc");
}