Vulnerabilities > CVE-2020-6073 - Integer Overflow or Wraparound vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH 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 | 1 | |
| OS | 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 family Debian Local Security Checks NASL id DEBIAN_DSA-4671.NASL description 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. last seen 2020-05-09 modified 2020-05-04 plugin id 136291 published 2020-05-04 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136291 title Debian 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 family Gentoo Local Security Checks NASL id GENTOO_GLSA-202005-10.NASL description The 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 seen 2020-05-21 modified 2020-05-15 plugin id 136640 published 2020-05-15 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136640 title GLSA-202005-10 : libmicrodns: Multiple vulnerabilities NASL family Windows NASL id VLC_3_0_9.NASL description The 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 seen 2020-05-15 modified 2020-05-08 plugin id 136422 published 2020-05-08 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136422 title VLC < 3.0.9 Multiple Vulnerabilities
Talos
| id | TALOS-2020-0996 |
| last seen | 2020-03-27 |
| published | 2020-03-23 |
| reporter | Talos Intelligence |
| source | http://www.talosintelligence.com/vulnerability_reports/TALOS-2020-0996 |
| title | Videolabs libmicrodns 0.1.0 TXT record RDATA-parsing denial-of-service vulnerability |
References
- https://security.gentoo.org/glsa/202005-10
- https://security.gentoo.org/glsa/202005-10
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-0996
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-0996
- https://www.debian.org/security/2020/dsa-4671
- https://www.debian.org/security/2020/dsa-4671