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Vulnerability of libxml2: unreachable memory reading via xmlNextChar

Synthesis of the vulnerability 

An attacker can invite the victim to open a malicious XML document, with an application linked with libxml2, to force a read at an invalid address in the xmlDictAddString() function, in order to trigger a denial of service.
Impacted software: iOS by Apple, iPhone, Mac OS X, Blue Coat CAS, ProxyAV, ProxyRA, ProxySG par Blue Coat, SGOS by Blue Coat, Debian, VNX Operating Environment, VNX Series, Fedora, Junos Space, NSM Central Manager, NSMXpress, libxml, McAfee Web Gateway, openSUSE, openSUSE Leap, Solaris, RHEL, Splunk Enterprise, SLES, Nessus, Ubuntu.
Severity of this computer vulnerability: 2/4.
Creation date: 23/02/2016.
Références of this announce: 758606, bulletinjul2016, CERTFR-2017-AVI-012, CERTFR-2017-AVI-022, CVE-2016-1833, DLA-503-1, DSA-2019-197, DSA-3593-1, FEDORA-2017-a3a47973eb, FEDORA-2017-be8574d593, HT206567, HT206568, JSA10770, JSA10774, JSA11023, openSUSE-SU-2016:1594-1, openSUSE-SU-2016:1595-1, RHSA-2016:1292-01, SA129, SB10170, SPL-119440, SPL-121159, SPL-123095, SUSE-SU-2016:1538-1, SUSE-SU-2016:1604-1, TNS-2017-03, USN-2994-1, VIGILANCE-VUL-19006.

Description of the vulnerability 

The libxml2 library includes an XML parser.

However, malformed XML data force the xmlNextChar() function to read an unreachable memory area, which triggers a fatal error.

An attacker can therefore invite the victim to open a malicious XML document, with an application linked with libxml2, to force a read at an invalid address in the xmlNextChar() function, in order to trigger a denial of service.
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This threat alert impacts software or systems such as iOS by Apple, iPhone, Mac OS X, Blue Coat CAS, ProxyAV, ProxyRA, ProxySG par Blue Coat, SGOS by Blue Coat, Debian, VNX Operating Environment, VNX Series, Fedora, Junos Space, NSM Central Manager, NSMXpress, libxml, McAfee Web Gateway, openSUSE, openSUSE Leap, Solaris, RHEL, Splunk Enterprise, SLES, Nessus, Ubuntu.

Our Vigil@nce team determined that the severity of this computer vulnerability bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of document.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this weakness note.

Solutions for this threat 

libxml2: version 2.9.4.
The version 2.9.4 is fixed:
  http://xmlsoft.org/downloads.html

libxml2: patch for xmlNextChar.
A patch is indicated in information sources.

Apple iOS: version 9.3.2.
The version 9.3.2 is fixed:
  https://support.apple.com/

Apple Mac OS X: version 10.11.5.
The version 10.11.5 is fixed:
  https://support.apple.com/

Blue Coat: solution for libxml2.
The solution is indicated in information sources.

Debian 7: new libxml2 packages.
New packages are available:
  Debian 7: libxml2 2.8.0+dfsg1-7+wheezy6

Debian: new libxml2 packages.
New packages are available:
  Debian 8: libxml2 2.9.1+dfsg1-5+deb8u2

Dell EMC VNXe: version MR4 Service Pack 5.
The version MR4 Service Pack 5 is fixed:
  https://www.dell.com/support/

Fedora: new libxml2 packages (19/04/2017).
New packages are available:
  Fedora 24: libxml2 2.9.4-2.fc24
  Fedora 25: libxml2 2.9.4-2.fc25

Juniper NSM Appliance: patch for Upgrade Package v3.
A patch is available:
  http://www.juniper.net/support/downloads/?p=nsm#sw

Junos Space: version 16.1R1.
The version 16.1R1 is fixed:
  https://www.juniper.net/

Junos Space: version 20.1R1.
The version 20.1R1 is fixed:
  https://www.juniper.net/support/downloads/

McAfee Web Gateway: versions 7.5.2.11 and 7.6.2.4.
Versions 7.5.2.11 and 7.6.2.4 are fixed:
  https://contentsecurity.mcafee.com/software_mwg7_download

openSUSE 13.2: new libxml2 packages (16/06/2016).
New packages are available:
  openSUSE 13.2: libxml2 2-2.9.4-7.17.1

openSUSE Leap 42.1: new libxml2 packages.
New packages are available:
  openSUSE Leap 42.1: libxml2 2-2.9.1-19.1

RHEL: new libxml2 packages.
New packages are available:
  RHEL 6: libxml2 2.7.6-21.el6_8.1
  RHEL 7: libxml2 2.9.1-6.el7_2.3

Solaris: patch for third party software of July 2016 v2.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

Splunk Enterprise: versions 6.4.2, 6.3.6, 6.2.11, 6.1.11, 6.0.12 and 5.0.16.
Versions 6.4.2, 6.3.6, 6.2.11, 6.1.11, 6.0.12 and 5.0.16 are fixed:
  http://www.splunk.com/en_us/download.html

SUSE LE: new libxml2 packages.
New packages are available:
  SUSE LE 12 SP1: libxml2 2-2.9.1-24.1
  SUSE LE 11 SP4: libxml2 2.7.6-0.44.1
  SUSE LE 11 SP3: libxml2 2.7.6-0.44.1
  SUSE LE 11 SP2: libxml2 2.7.6-0.44.1

Tenable Nessus: version 6.10.
The version 6.10 is fixed.

Ubuntu: new libxml2 packages (07/06/2016).
New packages are available:
  Ubuntu 16.04 LTS: libxml2 2.9.3+dfsg1-1ubuntu0.1
  Ubuntu 15.10: libxml2 2.9.2+zdfsg1-4ubuntu0.4
  Ubuntu 14.04 LTS: libxml2 2.9.1+dfsg1-3ubuntu4.8
  Ubuntu 12.04 LTS: libxml2 2.7.8.dfsg-5.1ubuntu4.15
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