Vulnerabilities > CVE-2016-2073 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in multiple products

047910
CVSS 6.5 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
xmlsoft
debian
canonical
CWE-119
nessus
NVD
Published: 2016-02-12
Updated: 2024-11-21

Summary

The htmlParseNameComplex function in HTMLparser.c in libxml2 allows attackers to cause a denial of service (out-of-bounds read) via a crafted XML document.

Vulnerable Configurations

Part Description Count
Application
Xmlsoft
148
OS
Debian
1
OS
Canonical
4

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2016-1538-1.NASL
    descriptionThis update for libxml2 fixes the following security issues : - CVE-2016-2073, CVE-2015-8806, CVE-2016-1839: A Heap-buffer overread was fixed in libxml2/dict.c [bsc#963963, bsc#965283, bsc#981114]. - CVE-2016-4483: Code was added to avoid an out of bound access when serializing malformed strings [bsc#978395]. - CVE-2016-1762: Fixed a heap-based buffer overread in xmlNextChar [bsc#981040]. - CVE-2016-1834: Fixed a heap-buffer-overflow in xmlStrncat [bsc#981041]. - CVE-2016-1833: Fixed a heap-based buffer overread in htmlCurrentChar [bsc#981108]. - CVE-2016-1835: Fixed a heap use-after-free in xmlSAX2AttributeNs [bsc#981109]. - CVE-2016-1837: Fixed a heap use-after-free in htmlParsePubidLiteral and htmlParseSystemiteral [bsc#981111]. - CVE-2016-1838: Fixed a heap-based buffer overread in xmlParserPrintFileContextInternal [bsc#981112]. - CVE-2016-1840: Fixed a heap-buffer-overflow in xmlFAParsePosCharGroup [bsc#981115]. - CVE-2016-4447: Fixed a heap-based buffer-underreads due to xmlParseName [bsc#981548]. - CVE-2016-4448: Fixed some format string warnings with possible format string vulnerability [bsc#981549], - CVE-2016-4449: Fixed inappropriate fetch of entities content [bsc#981550]. - CVE-2016-3705: Fixed missing increment of recursion counter. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id91656
    published2016-06-17
    reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/91656
    titleSUSE SLED12 / SLES12 Security Update : libxml2 (SUSE-SU-2016:1538-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2016:1538-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(91656);
  script_version("2.7");
  script_cvs_date("Date: 2019/09/11 11:22:13");

  script_cve_id("CVE-2015-8806", "CVE-2016-1762", "CVE-2016-1833", "CVE-2016-1834", "CVE-2016-1835", "CVE-2016-1837", "CVE-2016-1838", "CVE-2016-1839", "CVE-2016-1840", "CVE-2016-2073", "CVE-2016-3705", "CVE-2016-4447", "CVE-2016-4448", "CVE-2016-4449", "CVE-2016-4483");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : libxml2 (SUSE-SU-2016:1538-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for libxml2 fixes the following security issues :

  - CVE-2016-2073, CVE-2015-8806, CVE-2016-1839: A
    Heap-buffer overread was fixed in libxml2/dict.c
    [bsc#963963, bsc#965283, bsc#981114].

  - CVE-2016-4483: Code was added to avoid an out of bound
    access when serializing malformed strings [bsc#978395].

  - CVE-2016-1762: Fixed a heap-based buffer overread in
    xmlNextChar [bsc#981040].

  - CVE-2016-1834: Fixed a heap-buffer-overflow in
    xmlStrncat [bsc#981041].

  - CVE-2016-1833: Fixed a heap-based buffer overread in
    htmlCurrentChar [bsc#981108].

  - CVE-2016-1835: Fixed a heap use-after-free in
    xmlSAX2AttributeNs [bsc#981109].

  - CVE-2016-1837: Fixed a heap use-after-free in
    htmlParsePubidLiteral and htmlParseSystemiteral
    [bsc#981111].

  - CVE-2016-1838: Fixed a heap-based buffer overread in
    xmlParserPrintFileContextInternal [bsc#981112].

  - CVE-2016-1840: Fixed a heap-buffer-overflow in
    xmlFAParsePosCharGroup [bsc#981115].

  - CVE-2016-4447: Fixed a heap-based buffer-underreads due
    to xmlParseName [bsc#981548].

  - CVE-2016-4448: Fixed some format string warnings with
    possible format string vulnerability [bsc#981549],

  - CVE-2016-4449: Fixed inappropriate fetch of entities
    content [bsc#981550].

  - CVE-2016-3705: Fixed missing increment of recursion
    counter.

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE 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://bugzilla.suse.com/show_bug.cgi?id=963963"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=965283"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=978395"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=981040"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=981041"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=981108"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=981109"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=981111"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=981112"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=981114"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=981115"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=981548"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=981549"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=981550"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2015-8806/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-1762/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-1833/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-1834/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-1835/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-1837/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-1838/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-1839/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-1840/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-2073/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-3705/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-4447/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-4448/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-4449/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-4483/"
  );
  # https://www.suse.com/support/update/announcement/2016/suse-su-20161538-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?4955850f"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Software Development Kit 12-SP1 :

zypper in -t patch SUSE-SLE-SDK-12-SP1-2016-915=1

SUSE Linux Enterprise Software Development Kit 12 :

zypper in -t patch SUSE-SLE-SDK-12-2016-915=1

SUSE Linux Enterprise Server 12-SP1 :

zypper in -t patch SUSE-SLE-SERVER-12-SP1-2016-915=1

SUSE Linux Enterprise Server 12 :

zypper in -t patch SUSE-SLE-SERVER-12-2016-915=1

SUSE Linux Enterprise Desktop 12-SP1 :

zypper in -t patch SUSE-SLE-DESKTOP-12-SP1-2016-915=1

SUSE Linux Enterprise Desktop 12 :

zypper in -t patch SUSE-SLE-DESKTOP-12-2016-915=1

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxml2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxml2-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxml2-2-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxml2-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxml2-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxml2-tools-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:python-libxml2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:python-libxml2-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:python-libxml2-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/02/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/06/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/06/17");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2019 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/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");

  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, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED12|SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED12 / SLES12", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(0|1)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP0/1", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(0|1)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP0/1", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"1", reference:"libxml2-2-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"libxml2-2-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"libxml2-debugsource-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"libxml2-tools-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"libxml2-tools-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"python-libxml2-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"python-libxml2-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"python-libxml2-debugsource-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"libxml2-2-32bit-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"libxml2-2-debuginfo-32bit-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"libxml2-2-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"libxml2-2-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"libxml2-debugsource-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"libxml2-tools-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"libxml2-tools-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"python-libxml2-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"python-libxml2-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"python-libxml2-debugsource-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"libxml2-2-32bit-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"libxml2-2-debuginfo-32bit-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"libxml2-2-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"libxml2-2-32bit-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"libxml2-2-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"libxml2-2-debuginfo-32bit-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"libxml2-debugsource-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"libxml2-tools-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"libxml2-tools-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"python-libxml2-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"python-libxml2-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"python-libxml2-debugsource-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"libxml2-2-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"libxml2-2-32bit-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"libxml2-2-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"libxml2-2-debuginfo-32bit-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"libxml2-debugsource-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"libxml2-tools-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"libxml2-tools-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"python-libxml2-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"python-libxml2-debuginfo-2.9.1-24.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"python-libxml2-debugsource-2.9.1-24.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libxml2");
}
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-503.NASL
    descriptionSeveral vulnerabilities were discovered in libxml2, a library providing support to read, modify and write XML and HTML files. A remote attacker could provide a specially crafted XML or HTML file that, when processed by an application using libxml2, would cause a denial of service against the application, or potentially the execution of arbitrary code with the privileges of the user running the application. For Debian 7
    last seen2020-03-17
    modified2016-06-06
    plugin id91472
    published2016-06-06
    reporterThis script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/91472
    titleDebian DLA-503-1 : libxml2 security update
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-503-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(91472);
  script_version("2.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2015-8806", "CVE-2016-1762", "CVE-2016-1833", "CVE-2016-1834", "CVE-2016-1835", "CVE-2016-1837", "CVE-2016-1838", "CVE-2016-1839", "CVE-2016-1840", "CVE-2016-2073", "CVE-2016-3627", "CVE-2016-3705", "CVE-2016-4447", "CVE-2016-4449", "CVE-2016-4483");

  script_name(english:"Debian DLA-503-1 : libxml2 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:
"Several vulnerabilities were discovered in libxml2, a library
providing support to read, modify and write XML and HTML files. A
remote attacker could provide a specially crafted XML or HTML file
that, when processed by an application using libxml2, would cause a
denial of service against the application, or potentially the
execution of arbitrary code with the privileges of the user running
the application.

For Debian 7 'Wheezy', these problems have been fixed in version
2.8.0+dfsg1-7+wheezy6.

We recommend that you upgrade your libxml2 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/2016/06/msg00004.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/libxml2"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2-utils-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-libxml2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-libxml2-dbg");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/02/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/06/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/06/06");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2020 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:"7.0", prefix:"libxml2", reference:"2.8.0+dfsg1-7+wheezy6")) flag++;
if (deb_check(release:"7.0", prefix:"libxml2-dbg", reference:"2.8.0+dfsg1-7+wheezy6")) flag++;
if (deb_check(release:"7.0", prefix:"libxml2-dev", reference:"2.8.0+dfsg1-7+wheezy6")) flag++;
if (deb_check(release:"7.0", prefix:"libxml2-doc", reference:"2.8.0+dfsg1-7+wheezy6")) flag++;
if (deb_check(release:"7.0", prefix:"libxml2-utils", reference:"2.8.0+dfsg1-7+wheezy6")) flag++;
if (deb_check(release:"7.0", prefix:"libxml2-utils-dbg", reference:"2.8.0+dfsg1-7+wheezy6")) flag++;
if (deb_check(release:"7.0", prefix:"python-libxml2", reference:"2.8.0+dfsg1-7+wheezy6")) flag++;
if (deb_check(release:"7.0", prefix:"python-libxml2-dbg", reference:"2.8.0+dfsg1-7+wheezy6")) 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 familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3593.NASL
    descriptionSeveral vulnerabilities were discovered in libxml2, a library providing support to read, modify and write XML and HTML files. A remote attacker could provide a specially crafted XML or HTML file that, when processed by an application using libxml2, would cause a denial-of-service against the application, or potentially the execution of arbitrary code with the privileges of the user running the application.
    last seen2020-06-01
    modified2020-06-02
    plugin id91447
    published2016-06-03
    reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/91447
    titleDebian DSA-3593-1 : libxml2 - security update
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201701-37.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201701-37 (libxml2: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in libxml2. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could entice a user or automated system to process a specially crafted XML document, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id96541
    published2017-01-17
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/96541
    titleGLSA-201701-37 : libxml2: Multiple vulnerabilities
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-2994-1.NASL
    descriptionIt was discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could possibly cause libxml2 to crash, resulting in a denial of service. (CVE-2015-8806, CVE-2016-2073, CVE-2016-3627, CVE-2016-3705, CVE-2016-4447) It was discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-1762, CVE-2016-1834) Mateusz Jurczyk discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-1833, CVE-2016-1838, CVE-2016-1839) Wei Lei and Liu Yang discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-1835, CVE-2016-1837) Wei Lei and Liu Yang discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2016-1836) Kostya Serebryany discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-1840) It was discovered that libxml2 would load certain XML external entities. If a user or automated system were tricked into opening a specially crafted document, an attacker could possibly obtain access to arbitrary files or cause resource consumption. (CVE-2016-4449) Gustavo Grieco discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could possibly cause libxml2 to crash, resulting in a denial of service. (CVE-2016-4483). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id91499
    published2016-06-07
    reporterUbuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/91499
    titleUbuntu 12.04 LTS / 14.04 LTS / 15.10 / 16.04 LTS : libxml2 vulnerabilities (USN-2994-1)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2016-733.NASL
    descriptionThis update for libxml2 fixes the following security issues : - CVE-2016-2073, CVE-2015-8806, CVE-2016-1839: A Heap-buffer overread was fixed in libxml2/dict.c [bsc#963963, bsc#965283, bsc#981114]. - CVE-2016-4483: Code was added to avoid an out of bound access when serializing malformed strings [bsc#978395]. - CVE-2016-1762: Fixed a heap-based buffer overread in xmlNextChar [bsc#981040]. - CVE-2016-1834: Fixed a heap-buffer-overflow in xmlStrncat [bsc#981041]. - CVE-2016-1833: Fixed a heap-based buffer overread in htmlCurrentChar [bsc#981108]. - CVE-2016-1835: Fixed a heap use-after-free in xmlSAX2AttributeNs [bsc#981109]. - CVE-2016-1837: Fixed a heap use-after-free in htmlParsePubidLiteral and htmlParseSystemiteral [bsc#981111]. - CVE-2016-1838: Fixed a heap-based buffer overread in xmlParserPrintFileContextInternal [bsc#981112]. - CVE-2016-1840: Fixed a heap-buffer-overflow in xmlFAParsePosCharGroup [bsc#981115]. - CVE-2016-4447: Fixed a heap-based buffer-underreads due to xmlParseName [bsc#981548]. - CVE-2016-4448: Fixed some format string warnings with possible format string vulnerability [bsc#981549], - CVE-2016-4449: Fixed inappropriate fetch of entities content [bsc#981550]. - CVE-2016-3705: Fixed missing increment of recursion counter. This update was imported from the SUSE:SLE-12:Update update project.
    last seen2020-06-05
    modified2016-06-17
    plugin id91639
    published2016-06-17
    reporterThis script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/91639
    titleopenSUSE Security Update : libxml2 (openSUSE-2016-733)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2016-1604-1.NASL
    descriptionThis update for libxml2 fixes the following security issues : - CVE-2016-2073, CVE-2015-8806, CVE-2016-1839: A Heap-buffer overread was fixed in libxml2/dict.c [bsc#963963, bsc#965283, bsc#981114]. - CVE-2016-4483: Code was added to avoid an out of bound access when serializing malformed strings [bsc#978395]. - CVE-2016-1762: Fixed a heap-based buffer overread in xmlNextChar [bsc#981040]. - CVE-2016-1834: Fixed a heap-buffer-overflow in xmlStrncat [bsc#981041]. - CVE-2016-1833: Fixed a heap-based buffer overread in htmlCurrentChar [bsc#981108]. - CVE-2016-1835: Fixed a heap use-after-free in xmlSAX2AttributeNs [bsc#981109]. - CVE-2016-1837: Fixed a heap use-after-free in htmlParsePubidLiteral and htmlParseSystemiteral [bsc#981111]. - CVE-2016-1838: Fixed a heap-based buffer overread in xmlParserPrintFileContextInternal [bsc#981112]. - CVE-2016-1840: Fixed a heap-buffer-overflow in xmlFAParsePosCharGroup [bsc#981115]. - CVE-2016-4447: Fixed a heap-based buffer-underreads due to xmlParseName [bsc#981548]. - CVE-2016-4448: Fixed some format string warnings with possible format string vulnerability [bsc#981549], - CVE-2016-4449: Fixed inappropriate fetch of entities content [bsc#981550]. - CVE-2016-3705: Fixed missing increment of recursion counter. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id93154
    published2016-08-29
    reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/93154
    titleSUSE SLES11 Security Update : libxml2 (SUSE-SU-2016:1604-1)

References