ID CVE-2016-1526
Summary The TtfUtil:LocaLookup function in TtfUtil.cpp in Libgraphite in Graphite 2 1.2.4, as used in Mozilla Firefox before 43.0 and Firefox ESR 38.x before 38.6.1, incorrectly validates a size value, which allows remote attackers to obtain sensitive information or cause a denial of service (out-of-bounds read and application crash) via a crafted Graphite smart font.
Vulnerable Configurations
  • Debian Linux 7.0
  • Debian Linux 8.0 (Jessie)
  • cpe:2.3:a:mozilla:firefox_esr:38.5.2
  • Mozilla Firefox ESR 38.5.1
  • Mozilla Firefox ESR 38.2.1
  • Mozilla Firefox ESR 38.1.1
  • Mozilla Firefox ESR 38.0.5
  • Mozilla Firefox ESR 38.0.1
  • Mozilla Firefox ESR 38.5.0
  • Mozilla Firefox ESR 38.4.0
  • Mozilla Firefox Extended Support Release (ESR) 38.3.0
  • Mozilla Firefox ESR 38.2.0
  • Mozilla Firefox ESR 38.1.0
  • Mozilla Firefox ESR 38.0
  • Mozilla Thunderbird 38.5.1
  • Mozilla Firefox Extended Support Release (ESR) 38.6.0
  • SIL Graphite2 1.2.4
  • Fedora Project Fedora 23
  • Fedora 22
Base: 5.8 (as of 17-08-2016 - 15:16)
  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.
  • Reusing Session IDs (aka Session Replay)
    This attack targets the reuse of valid session ID to spoof the target system in order to gain privileges. The attacker tries to reuse a stolen session ID used previously during a transaction to perform spoofing and session hijacking. Another name for this type of attack is Session Replay.
  • Using Slashes in Alternate Encoding
    This attack targets the encoding of the Slash characters. An attacker would try to exploit common filtering problems related to the use of the slashes characters to gain access to resources on the target host. Directory-driven systems, such as file systems and databases, typically use the slash character to indicate traversal between directories or other container components. For murky historical reasons, PCs (and, as a result, Microsoft OSs) choose to use a backslash, whereas the UNIX world typically makes use of the forward slash. The schizophrenic result is that many MS-based systems are required to understand both forms of the slash. This gives the attacker many opportunities to discover and abuse a number of common filtering problems. The goal of this pattern is to discover server software that only applies filters to one version, but not the other.
redhat via4
id 1308590
title CVE-2016-1526 graphite2: Out-of-bounds read vulnerability in TfUtil:LocaLookup
  • OR
    • comment Red Hat Enterprise Linux 7 Client is installed
      oval oval:com.redhat.rhsa:tst:20140675001
    • comment Red Hat Enterprise Linux 7 Server is installed
      oval oval:com.redhat.rhsa:tst:20140675002
    • comment Red Hat Enterprise Linux 7 Workstation is installed
      oval oval:com.redhat.rhsa:tst:20140675003
    • comment Red Hat Enterprise Linux 7 ComputeNode is installed
      oval oval:com.redhat.rhsa:tst:20140675004
  • OR
    • AND
      • comment graphite2 is earlier than 0:1.3.6-1.el7_2
        oval oval:com.redhat.rhsa:tst:20160594007
      • comment graphite2 is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20160594008
    • AND
      • comment graphite2-devel is earlier than 0:1.3.6-1.el7_2
        oval oval:com.redhat.rhsa:tst:20160594005
      • comment graphite2-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20160594006
id RHSA-2016:0594
released 2016-04-05
severity Important
title RHSA-2016:0594: graphite2 security, bug fix, and enhancement update (Important)
  • graphite2-0:1.3.6-1.el7_2
  • graphite2-devel-0:1.3.6-1.el7_2
  • firefox-0:45.1.0-1.el5_11
  • firefox-0:45.1.0-1.el6_7
  • firefox-0:45.1.0-1.el7_2
refmap via4
bid 82991
debian DSA-3479
  • FEDORA-2016-338a7e9925
  • FEDORA-2016-4154a4d0ba
  • GLSA-201701-35
  • GLSA-201701-63
  • SUSE-SU-2016:0779
  • openSUSE-SU-2016:0791
  • openSUSE-SU-2016:0875
ubuntu USN-2902-1
Last major update 05-12-2016 - 22:07
Published 12-02-2016 - 21:59
Last modified 30-06-2017 - 21:29
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