Vulnerabilities > CVE-2020-13114 - Allocation of Resources Without Limits or Throttling vulnerability in multiple products

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
libexif-project
canonical
opensuse
CWE-770
nessus
NVD
Published: 2020-05-21
Updated: 2024-11-21

Summary

An issue was discovered in libexif before 0.6.22. An unrestricted size in handling Canon EXIF MakerNote data could lead to consumption of large amounts of compute time for decoding EXIF data.

Vulnerable Configurations

Part Description Count
Application
Libexif_Project
16
OS
Canonical
6
OS
Opensuse
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Locate and Exploit Test APIs
    An attacker exploits a sample, demonstration, or test API that is insecure by default and should not be resident on production systems. Some applications include APIs that are intended to allow an administrator to test and refine their domain. These APIs should usually be disabled once a system enters a production environment. Testing APIs may expose a great deal of diagnostic information intended to aid an administrator, but which can also be used by an attacker to further refine their attack. Moreover, testing APIs may not have adequate security controls or may not have undergone rigorous testing since they were not intended for use in production environments. As such, they may have many flaws and vulnerabilities that would allow an attacker to severely disrupt a target.
  • Flooding
    An attacker consumes the resources of a target by rapidly engaging in a large number of interactions with the target. This type of attack generally exposes a weakness in rate limiting or flow control in management of interactions. Since each request consumes some of the target's resources, if a sufficiently large number of requests must be processed at the same time then the target's resources can be exhausted. The degree to which the attack is successful depends upon the volume of requests in relation to the amount of the resource the target has access to, and other mitigating circumstances such as the target's ability to shift load or acquired additional resources to deal with the depletion. The more protected the resource and the greater the quantity of it that must be consumed, the more resources the attacker may need to have at their disposal. A typical TCP/IP flooding attack is a Distributed Denial-of-Service attack where many machines simultaneously make a large number of requests to a target. Against a target with strong defenses and a large pool of resources, many tens of thousands of attacking machines may be required. When successful this attack prevents legitimate users from accessing the service and can cause the target to crash. This attack differs from resource depletion through leaks or allocations in that the latter attacks do not rely on the volume of requests made to the target but instead focus on manipulation of the target's operations. The key factor in a flooding attack is the number of requests the attacker can make in a given period of time. The greater this number, the more likely an attack is to succeed against a given target.
  • Excessive Allocation
    An attacker causes the target to allocate excessive resources to servicing the attackers' request, thereby reducing the resources available for legitimate services and degrading or denying services. Usually, this attack focuses on memory allocation, but any finite resource on the target could be the attacked, including bandwidth, processing cycles, or other resources. This attack does not attempt to force this allocation through a large number of requests (that would be Resource Depletion through Flooding) but instead uses one or a small number of requests that are carefully formatted to force the target to allocate excessive resources to service this request(s). Often this attack takes advantage of a bug in the target to cause the target to allocate resources vastly beyond what would be needed for a normal request. For example, using an Integer Attack, the attacker could cause a variable that controls allocation for a request to hold an excessively large value. Excessive allocation of resources can render a service degraded or unavailable to legitimate users and can even lead to crashing of the target.
  • XML Ping of the Death
    An attacker initiates a resource depletion attack where a large number of small XML messages are delivered at a sufficiently rapid rate to cause a denial of service or crash of the target. Transactions such as repetitive SOAP transactions can deplete resources faster than a simple flooding attack because of the additional resources used by the SOAP protocol and the resources necessary to process SOAP messages. The transactions used are immaterial as long as they cause resource utilization on the target. In other words, this is a normal flooding attack augmented by using messages that will require extra processing on the target.
  • XML Entity Expansion
    An attacker submits an XML document to a target application where the XML document uses nested entity expansion to produce an excessively large output XML. XML allows the definition of macro-like structures that can be used to simplify the creation of complex structures. However, this capability can be abused to create excessive demands on a processor's CPU and memory. A small number of nested expansions can result in an exponential growth in demands on memory.

Nessus

  • NASL familySlackware Local Security Checks
    NASL idSLACKWARE_SSA_2020-140-02.NASL
    descriptionNew libexif packages are available for Slackware 14.0, 14.1, 14.2, and -current to fix security issues.
    last seen2020-05-31
    modified2020-05-20
    plugin id136729
    published2020-05-20
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136729
    titleSlackware 14.0 / 14.1 / 14.2 / current : libexif (SSA:2020-140-02)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Slackware Security Advisory 2020-140-02. The text 
# itself is copyright (C) Slackware Linux, Inc.
#

include("compat.inc");

if (description)
{
  script_id(136729);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/26");

  script_cve_id("CVE-2016-6328", "CVE-2017-7544", "CVE-2018-20030", "CVE-2019-9278", "CVE-2020-0093", "CVE-2020-12767", "CVE-2020-13112", "CVE-2020-13113", "CVE-2020-13114");
  script_xref(name:"SSA", value:"2020-140-02");

  script_name(english:"Slackware 14.0 / 14.1 / 14.2 / current : libexif (SSA:2020-140-02)");
  script_summary(english:"Checks for updated package in /var/log/packages");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote Slackware host is missing a security update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"New libexif packages are available for Slackware 14.0, 14.1, 14.2,
and -current to fix security issues."
  );
  # http://www.slackware.com/security/viewer.php?l=slackware-security&y=2020&m=slackware-security.499815
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?142d0c0f"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Update the affected libexif package."
  );
  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:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-9278");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:slackware:slackware_linux:libexif");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.2");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/20");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Slackware Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Slackware/release", "Host/Slackware/packages");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("slackware.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Slackware/release")) audit(AUDIT_OS_NOT, "Slackware");
if (!get_kb_item("Host/Slackware/packages")) audit(AUDIT_PACKAGE_LIST_MISSING);


cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Slackware", cpu);


flag = 0;
if (slackware_check(osver:"14.0", pkgname:"libexif", pkgver:"0.6.22", pkgarch:"i486", pkgnum:"1_slack14.0")) flag++;
if (slackware_check(osver:"14.0", arch:"x86_64", pkgname:"libexif", pkgver:"0.6.22", pkgarch:"x86_64", pkgnum:"1_slack14.0")) flag++;

if (slackware_check(osver:"14.1", pkgname:"libexif", pkgver:"0.6.22", pkgarch:"i486", pkgnum:"1_slack14.1")) flag++;
if (slackware_check(osver:"14.1", arch:"x86_64", pkgname:"libexif", pkgver:"0.6.22", pkgarch:"x86_64", pkgnum:"1_slack14.1")) flag++;

if (slackware_check(osver:"14.2", pkgname:"libexif", pkgver:"0.6.22", pkgarch:"i486", pkgnum:"1_slack14.2")) flag++;
if (slackware_check(osver:"14.2", arch:"x86_64", pkgname:"libexif", pkgver:"0.6.22", pkgarch:"x86_64", pkgnum:"1_slack14.2")) flag++;

if (slackware_check(osver:"current", pkgname:"libexif", pkgver:"0.6.22", pkgarch:"i586", pkgnum:"1")) flag++;
if (slackware_check(osver:"current", arch:"x86_64", pkgname:"libexif", pkgver:"0.6.22", pkgarch:"x86_64", pkgnum:"1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:slackware_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2020-793.NASL
    descriptionThis update for libexif to 0.6.22 fixes the following issues : Security issues fixed : - CVE-2016-6328: Fixed an integer overflow in parsing MNOTE entry data of the input file (bsc#1055857). - CVE-2017-7544: Fixed an out-of-bounds heap read vulnerability in exif_data_save_data_entry function in libexif/exif-data.c (bsc#1059893). - CVE-2018-20030: Fixed a denial of service by endless recursion (bsc#1120943). - CVE-2019-9278: Fixed an integer overflow (bsc#1160770). - CVE-2020-0093: Fixed an out-of-bounds read in exif_data_save_data_entry (bsc#1171847). - CVE-2020-12767: Fixed a divide-by-zero error in exif_entry_get_value (bsc#1171475). - CVE-2020-13112: Fixed a time consumption DoS when parsing canon array markers (bsc#1172121). - CVE-2020-13113: Fixed a potential use of uninitialized memory (bsc#1172105). - CVE-2020-13114: Fixed various buffer overread fixes due to integer overflows in maker notes (bsc#1172116). Non-security issues fixed : - libexif was updated to version 0.6.22 : - New translations: ms - Updated translations for most languages - Some useful EXIF 2.3 tag added : - EXIF_TAG_GAMMA - EXIF_TAG_COMPOSITE_IMAGE - EXIF_TAG_SOURCE_IMAGE_NUMBER_OF_COMPOSITE_IMAGE - EXIF_TAG_SOURCE_EXPOSURE_TIMES_OF_COMPOSITE_IMAGE - EXIF_TAG_GPS_H_POSITIONING_ERROR - EXIF_TAG_CAMERA_OWNER_NAME - EXIF_TAG_BODY_SERIAL_NUMBER - EXIF_TAG_LENS_SPECIFICATION - EXIF_TAG_LENS_MAKE - EXIF_TAG_LENS_MODEL - EXIF_TAG_LENS_SERIAL_NUMBER This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-06-13
    modified2020-06-12
    plugin id137392
    published2020-06-12
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/137392
    titleopenSUSE Security Update : libexif (openSUSE-2020-793)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2020-793.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(137392);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/18");

  script_cve_id("CVE-2016-6328", "CVE-2017-7544", "CVE-2018-20030", "CVE-2019-9278", "CVE-2020-0093", "CVE-2020-12767", "CVE-2020-13112", "CVE-2020-13113", "CVE-2020-13114");

  script_name(english:"openSUSE Security Update : libexif (openSUSE-2020-793)");
  script_summary(english:"Check for the openSUSE-2020-793 patch");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"This update for libexif to 0.6.22 fixes the following issues :

Security issues fixed :

  - CVE-2016-6328: Fixed an integer overflow in parsing
    MNOTE entry data of the input file (bsc#1055857).

  - CVE-2017-7544: Fixed an out-of-bounds heap read
    vulnerability in exif_data_save_data_entry function in
    libexif/exif-data.c (bsc#1059893).

  - CVE-2018-20030: Fixed a denial of service by endless
    recursion (bsc#1120943).

  - CVE-2019-9278: Fixed an integer overflow (bsc#1160770).

  - CVE-2020-0093: Fixed an out-of-bounds read in
    exif_data_save_data_entry (bsc#1171847).

  - CVE-2020-12767: Fixed a divide-by-zero error in
    exif_entry_get_value (bsc#1171475).

  - CVE-2020-13112: Fixed a time consumption DoS when
    parsing canon array markers (bsc#1172121).

  - CVE-2020-13113: Fixed a potential use of uninitialized
    memory (bsc#1172105).

  - CVE-2020-13114: Fixed various buffer overread fixes due
    to integer overflows in maker notes (bsc#1172116).

Non-security issues fixed :

  - libexif was updated to version 0.6.22 :

  - New translations: ms

  - Updated translations for most languages

  - Some useful EXIF 2.3 tag added :

  - EXIF_TAG_GAMMA

  - EXIF_TAG_COMPOSITE_IMAGE

  - EXIF_TAG_SOURCE_IMAGE_NUMBER_OF_COMPOSITE_IMAGE

  - EXIF_TAG_SOURCE_EXPOSURE_TIMES_OF_COMPOSITE_IMAGE

  - EXIF_TAG_GPS_H_POSITIONING_ERROR

  - EXIF_TAG_CAMERA_OWNER_NAME

  - EXIF_TAG_BODY_SERIAL_NUMBER

  - EXIF_TAG_LENS_SPECIFICATION

  - EXIF_TAG_LENS_MAKE

  - EXIF_TAG_LENS_MODEL

  - EXIF_TAG_LENS_SERIAL_NUMBER

This update was imported from the SUSE:SLE-15:Update update project."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1055857"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1059893"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1120943"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1160770"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1171475"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1171847"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1172105"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1172116"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1172121"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Update the affected libexif 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:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-9278");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libexif-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libexif-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libexif-devel-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libexif12");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libexif12-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libexif12-32bit-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libexif12-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.1");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/06/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/12");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020 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/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");

  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, "openSUSE");
if (release !~ "^(SUSE15\.1)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.1", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE15.1", reference:"libexif-debugsource-0.6.22-lp151.4.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"libexif-devel-0.6.22-lp151.4.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"libexif12-0.6.22-lp151.4.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"libexif12-debuginfo-0.6.22-lp151.4.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", cpu:"x86_64", reference:"libexif-devel-32bit-0.6.22-lp151.4.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", cpu:"x86_64", reference:"libexif12-32bit-0.6.22-lp151.4.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", cpu:"x86_64", reference:"libexif12-32bit-debuginfo-0.6.22-lp151.4.6.1") ) 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, "libexif-debugsource / libexif-devel / libexif12 / etc");
}
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-2222.NASL
    descriptionVarious minor vulnerabilities have been addredd in libexif, a library to parse EXIF metadata files. CVE-2018-20030 This issue had already been addressed via DLA-2214-1. However, upstream provided an updated patch, so this has been followed up on. CVE-2020-13112 Several buffer over-reads in EXIF MakerNote handling could have lead to information disclosure and crashes. This issue is different from already resolved CVE-2020-0093. CVE-2020-13113 Use of uninitialized memory in EXIF Makernote handling could have lead to crashes and potential use-after-free conditions. CVE-2020-13114 An unrestricted size in handling Canon EXIF MakerNote data could have lead to consumption of large amounts of compute time for decoding EXIF data. For Debian 8
    last seen2020-06-06
    modified2020-05-29
    plugin id136952
    published2020-05-29
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136952
    titleDebian DLA-2222-1 : libexif security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2222-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(136952);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/18");

  script_cve_id("CVE-2018-20030", "CVE-2020-13112", "CVE-2020-13113", "CVE-2020-13114");

  script_name(english:"Debian DLA-2222-1 : libexif security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"Various minor vulnerabilities have been addredd in libexif, a library
to parse EXIF metadata files.

CVE-2018-20030

This issue had already been addressed via DLA-2214-1. However,
upstream provided an updated patch, so this has been followed up on.

CVE-2020-13112

Several buffer over-reads in EXIF MakerNote handling could have lead
to information disclosure and crashes. This issue is different from
already resolved CVE-2020-0093.

CVE-2020-13113

Use of uninitialized memory in EXIF Makernote handling could have lead
to crashes and potential use-after-free conditions.

CVE-2020-13114

An unrestricted size in handling Canon EXIF MakerNote data could have
lead to consumption of large amounts of compute time for decoding EXIF
data.

For Debian 8 'Jessie', these problems have been fixed in version
0.6.21-2+deb8u3.

We recommend that you upgrade your libexif packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA 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://lists.debian.org/debian-lts-announce/2020/05/msg00025.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/libexif"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Upgrade the affected libexif-dev, and libexif12 packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-13113");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libexif-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libexif12");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/02/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/29");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"libexif-dev", reference:"0.6.21-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"libexif12", reference:"0.6.21-2+deb8u3")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References