Vulnerabilities > CVE-2020-6080 - Memory Leak 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-401
nessus

Summary

An exploitable denial-of-service vulnerability exists in the resource allocation handling of Videolabs libmicrodns 0.1.0. When encountering errors while parsing mDNS messages, some allocated data is not freed, possibly leading to a denial-of-service condition via resource exhaustion. An attacker can send one mDNS message repeatedly to trigger this vulnerability through the function rr_read_RR [5] reads the current resource record, except for the RDATA section. This is read by the loop at in rr_read. For each RR type, a different function is called. When the RR type is 0x10, the function rr_read_TXT is called at [6].

Vulnerable Configurations

Part Description Count
Application
Videolabs
1
OS
Debian
2

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

Talos

idTALOS-2020-1002
last seen2020-05-12
published2020-03-23
reporterTalos Intelligence
sourcehttp://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1002
titleVideolabs libmicrodns 0.1.0 resource allocation denial-of-service vulnerabilities