Amazon Linux AMI : libarchive (ALAS-2019-1308)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2019-1308.
#

include('compat.inc');

if (description)
{
  script_id(129798);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/18");

  script_cve_id(
    "CVE-2017-14503",
    "CVE-2018-1000877",
    "CVE-2018-1000878",
    "CVE-2019-1000019",
    "CVE-2019-1000020"
  );
  script_xref(name:"ALAS", value:"2019-1308");

  script_name(english:"Amazon Linux AMI : libarchive (ALAS-2019-1308)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux AMI host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"libarchive 3.3.2 suffers from an out-of-bounds read within
lha_read_data_none() in archive_read_support_format_lha.c when
extracting a specially crafted lha archive, related to
lha_crc16.(CVE-2017-14503)

libarchive version commit 416694915449219d505531b1096384f3237dd6cc
onwards (release v3.1.0 onwards) contains a CWE-415 Double Free
vulnerability in RAR decoder -
libarchive/archive_read_support_format_rar.c, parse_codes(),
realloc(rar->lzss.window, new_size) with new_size = 0 that can result
in Crash/DoS. This attack appear to be exploitable via the victim must
open a specially crafted RAR archive.(CVE-2018-1000877)

libarchive version commit 416694915449219d505531b1096384f3237dd6cc
onwards (release v3.1.0 onwards) contains a CWE-416 Use After Free
vulnerability in RAR decoder,
libarchive/archive_read_support_format_rar.c that can result in
Crash/DoS, it is unknown if RCE is possible. This attack appear to be
exploitable via the victim must open a specially crafted RAR
archive.(CVE-2018-1000878)

libarchive version commit bf9aec176c6748f0ee7a678c5f9f9555b9a757c1
onwards (release v3.0.2 onwards) contains a CWE-125 Out-of-bounds Read
vulnerability in 7zip decompression,
archive_read_support_format_7zip.c, header_bytes() that can result in
a crash (denial of service). This attack appears to be exploitable via
the victim opening a specially crafted 7zip file.(CVE-2019-1000019)

libarchive version commit 5a98dcf8a86364b3c2c469c85b93647dfb139961
onwards (version v2.8.0 onwards) contains a CWE-835 Loop with
Unreachable Exit Condition ('Infinite Loop') vulnerability in ISO9660
parser, archive_read_support_format_iso9660.c,
read_CE()/parse_rockridge() that can result in DoS by infinite loop.
This attack appears to be exploitable via the victim opening a
specially crafted ISO9660 file.(CVE-2019-1000020)");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/ALAS-2019-1308.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update libarchive' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/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:L/PR:N/UI:R/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:"cvss_score_source", value:"CVE-2018-1000878");

  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:"2017/09/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/10/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/10/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bsdcpio");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bsdtar");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libarchive");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libarchive-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libarchive-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Amazon Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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 != "A")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}

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


flag = 0;
if (rpm_check(release:"ALA", reference:"bsdcpio-3.1.2-12.12.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bsdtar-3.1.2-12.12.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libarchive-3.1.2-12.12.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libarchive-debuginfo-3.1.2-12.12.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"libarchive-devel-3.1.2-12.12.amzn1")) 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, "bsdcpio / bsdtar / libarchive / libarchive-debuginfo / etc");
}