Alibaba Cloud Linux 3 : 0215: exiv2 (ALINUX3-SA-2022:0215)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# Alibaba Cloud Linux Security Advisory ALINUX3-SA-2022:0215.
##

include('compat.inc');

if (description)
{
  script_id(236265);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/05/14");

  script_cve_id(
    "CVE-2020-18898",
    "CVE-2021-3482",
    "CVE-2021-29458",
    "CVE-2021-29463",
    "CVE-2021-29464",
    "CVE-2021-29470",
    "CVE-2021-29473",
    "CVE-2021-29623",
    "CVE-2021-32617"
  );

  script_name(english:"Alibaba Cloud Linux 3 : 0215: exiv2 (ALINUX3-SA-2022:0215)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Alibaba Cloud Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced
in the ALINUX3-SA-2022:0215 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2020-18898:
    A stack exhaustion issue in the printIFDStructure function of Exiv2 0.27 allows remote attackers to cause
    a denial of service (DOS) via a crafted file.

    CVE-2021-29458:
    Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata
    of image files. An out-of-bounds read was found in Exiv2 versions v0.27.3 and earlier. The out-of-bounds
    read is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could
    potentially exploit the vulnerability to cause a denial of service by crashing Exiv2, if they can trick
    the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when writing
    the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to
    trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such
    as insert. The bug is fixed in version v0.27.4.

    CVE-2021-29463:
    Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata
    of image files. An out-of-bounds read was found in Exiv2 versions v0.27.3 and earlier. The out-of-bounds
    read is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could
    potentially exploit the vulnerability to cause a denial of service by crashing Exiv2, if they can trick
    the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when writing
    the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to
    trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such
    as `insert`. The bug is fixed in version v0.27.4.

    CVE-2021-29464:
    Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata
    of image files. A heap buffer overflow was found in Exiv2 versions v0.27.3 and earlier. The heap overflow
    is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially
    exploit the vulnerability to gain code execution, if they can trick the victim into running Exiv2 on a
    crafted image file. Note that this bug is only triggered when writing the metadata, which is a less
    frequently used Exiv2 operation than reading the metadata. For example, to trigger the bug in the Exiv2
    command-line application, you need to add an extra command-line argument such as `insert`. The bug is
    fixed in version v0.27.4.

    CVE-2021-29470:
    Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata
    of image files. An out-of-bounds read was found in Exiv2 versions v0.27.3 and earlier. The out-of-bounds
    read is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could
    potentially exploit the vulnerability to cause a denial of service by crashing Exiv2, if they can trick
    the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when writing
    the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to
    trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such
    as insert. The bug is fixed in version v0.27.4.

    CVE-2021-29473:
    Exiv2 is a C++ library and a command-line utility to read, write, delete and modify Exif, IPTC, XMP and
    ICC image metadata. An out-of-bounds read was found in Exiv2 versions v0.27.3 and earlier. Exiv2 is a
    command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image
    files. The out-of-bounds read is triggered when Exiv2 is used to write metadata into a crafted image file.
    An attacker could potentially exploit the vulnerability to cause a denial of service by crashing Exiv2, if
    they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered
    when writing the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For
    example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line
    argument such as `insert`. The bug is fixed in version v0.27.4. Please see our security policy for
    information about Exiv2 security.

    CVE-2021-29623:
    Exiv2 is a C++ library and a command-line utility to read, write, delete and modify Exif, IPTC, XMP and
    ICC image metadata. A read of uninitialized memory was found in Exiv2 versions v0.27.3 and earlier. Exiv2
    is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of
    image files. The read of uninitialized memory is triggered when Exiv2 is used to read the metadata of a
    crafted image file. An attacker could potentially exploit the vulnerability to leak a few bytes of stack
    memory, if they can trick the victim into running Exiv2 on a crafted image file. The bug is fixed in
    version v0.27.4.

    CVE-2021-32617:
    Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata
    of image files. An inefficient algorithm (quadratic complexity) was found in Exiv2 versions v0.27.3 and
    earlier. The inefficient algorithm is triggered when Exiv2 is used to write metadata into a crafted image
    file. An attacker could potentially exploit the vulnerability to cause a denial of service, if they can
    trick the victim into running Exiv2 on a crafted image file. The bug is fixed in version v0.27.4. Note
    that this bug is only triggered when _writing_ the metadata, which is a less frequently used Exiv2
    operation than _reading_ the metadata. For example, to trigger the bug in the Exiv2 command-line
    application, you need to add an extra command-line argument such as `rm`.

    CVE-2021-3482:
    A flaw was found in Exiv2 in versions before and including 0.27.4-RC1. Improper input validation of the
    rawData.size property in Jp2Image::readMetadata() in jp2image.cpp can lead to a heap-based buffer overflow
    via a crafted JPG image containing malicious EXIF data.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"http://mirrors.aliyun.com/alinux/3/cve/alinux3-sa-20220215.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  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:L/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-2021-29464");

  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:"2021/04/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/12/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/05/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:exiv2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:exiv2-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:exiv2-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:exiv2-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:exiv2-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:exiv2-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:exiv2-libs-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alibabacloud:alibaba_cloud_linux_3");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Alibaba/release", "Host/Alibaba/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Alibaba/release');
if (isnull(os_release) || 'Alibaba Cloud Linux' >!< os_release) audit(AUDIT_OS_NOT, 'Alibaba Cloud Linux');
var os_ver = pregmatch(pattern: "Alibaba Cloud Linux release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Alibaba Cloud Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^3([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Alibaba Cloud Linux 3.x', 'Alibaba Cloud Linux ' + os_ver);

if (!get_kb_item('Host/Alibaba/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Alibaba Cloud Linux', cpu);

var pkgs = [
    {'reference':'exiv2-0.27.5-2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-0.27.5-2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-debuginfo-0.27.5-2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-debuginfo-0.27.5-2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-debugsource-0.27.5-2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-debugsource-0.27.5-2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-devel-0.27.5-2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-devel-0.27.5-2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-doc-0.27.5-2.al8', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-libs-0.27.5-2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-libs-0.27.5-2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-libs-debuginfo-0.27.5-2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'exiv2-libs-debuginfo-0.27.5-2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  var cves = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = 'Alibaba Linux ' + package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'exiv2 / exiv2-debuginfo / exiv2-debugsource / exiv2-devel / etc');
}