Vulnerabilities > CVE-2020-6073 - Integer Overflow or Wraparound vulnerability in multiple products

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
low complexity
videolabs
debian
CWE-190
nessus
NVD
Published: 2020-03-24
Updated: 2022-06-03

Summary

An exploitable denial-of-service vulnerability exists in the TXT record-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing the RDATA section in a TXT record in mDNS messages, multiple integer overflows can be triggered, leading to a denial of service. An attacker can send an mDNS message to trigger this vulnerability.

Vulnerable Configurations

Part Description Count
Application
Videolabs
1
OS
Debian
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Forced Integer Overflow
    This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.

Nessus

  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4671.NASL
    descriptionMultiple security issues were discovered in the microdns plugin of the VLC media player, which could result in denial of service or potentially the execution of arbitrary code via malicious mDNS packets.
    last seen2020-05-09
    modified2020-05-04
    plugin id136291
    published2020-05-04
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136291
    titleDebian DSA-4671-1 : vlc - security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4671. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(136291);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/08");

  script_cve_id("CVE-2020-6071", "CVE-2020-6072", "CVE-2020-6073", "CVE-2020-6077", "CVE-2020-6078", "CVE-2020-6079", "CVE-2020-6080");
  script_xref(name:"DSA", value:"4671");
  script_xref(name:"IAVB", value:"2020-B-0025");

  script_name(english:"Debian DSA-4671-1 : vlc - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Multiple security issues were discovered in the microdns plugin of the
VLC media player, which could result in denial of service or
potentially the execution of arbitrary code via malicious mDNS
packets."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/vlc"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/vlc"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/buster/vlc"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2020/dsa-4671"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the vlc packages.

For the oldstable distribution (stretch), these problems have been
fixed in version 3.0.10-0+deb9u1. This update disables the microdns
plugin.

For the stable distribution (buster), these problems have been fixed
in version 3.0.10-0+deb10u1. This update disables the microdns plugin."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/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:"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:vlc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/04");
  script_set_attribute(attribute:"stig_severity", value:"II");
  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:"10.0", prefix:"libvlc-bin", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"libvlc-dev", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"libvlc5", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"libvlccore-dev", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"libvlccore9", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-bin", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-data", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-l10n", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-access-extra", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-base", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-fluidsynth", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-jack", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-notify", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-qt", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-samba", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-skins2", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-svg", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-video-output", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-video-splitter", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-visualization", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"vlc-plugin-zvbi", reference:"3.0.10-0+deb10u1")) flag++;
if (deb_check(release:"9.0", prefix:"libvlc-bin", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libvlc-dev", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libvlc5", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libvlccore-dev", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libvlccore8", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-bin", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-data", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-l10n", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-nox", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-access-extra", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-base", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-fluidsynth", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-jack", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-notify", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-qt", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-samba", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-sdl", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-skins2", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-svg", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-video-output", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-video-splitter", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-visualization", reference:"3.0.10-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"vlc-plugin-zvbi", reference:"3.0.10-0+deb9u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-202005-10.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-202005-10 (libmicrodns: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in libmicrodns. Please review the CVE identifiers and the upstream advisory referenced below for details. Impact : Please review the referenced CVE identifiers for details. Workaround : There is no known workaround at this time.
    last seen2020-05-21
    modified2020-05-15
    plugin id136640
    published2020-05-15
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136640
    titleGLSA-202005-10 : libmicrodns: Multiple vulnerabilities
  • NASL familyWindows
    NASL idVLC_3_0_9.NASL
    descriptionThe version of VLC media player installed on the remote Windows host is prior to 3.0.9. It is, therefore, affected by multiple vulnerabilities: - An exploitable denial-of-service vulnerability exists in the resource record-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing compressed labels in mDNS messages, the compression pointer is followed without checking for recursion, leading to a denial of service. An attacker can send an mDNS message to trigger this vulnerability (CVE-2020-6071). - An exploitable code execution vulnerability exists in the label-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing compressed labels in mDNS messages, the rr_decode function
    last seen2020-05-15
    modified2020-05-08
    plugin id136422
    published2020-05-08
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136422
    titleVLC < 3.0.9 Multiple Vulnerabilities

Talos

idTALOS-2020-0996
last seen2020-03-27
published2020-03-23
reporterTalos Intelligence
sourcehttp://www.talosintelligence.com/vulnerability_reports/TALOS-2020-0996
titleVideolabs libmicrodns 0.1.0 TXT record RDATA-parsing denial-of-service vulnerability

References