CVE-2016-1523

The SillMap::readFace function in FeatureMap.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, mishandles a return value, which allows remote attackers to cause a denial of service (missing initialization, NULL pointer dereference, and application crash) via a crafted Graphite smart font.

Multiple vulnerabilities in the graphite2 font library can result in information disclosure, denial-of-service (application crashes), or code execution via out-of-bounds reads, a NULL pointer dereference, and a heap-based buffer overflow (CVE-2016-1521, CVE-2016-1522, CVE-2016-1523, CVE-2016-1526).

Firefox includes a bundled copy of the graphite2 library, which has been updated in Firefox ESR 38.6.1.

Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Thunderbird to crash or, potentially, execute arbitrary code with the privileges of the user running Thunderbird (CVE-2016-1930, CVE-2016-1935).

Multiple security flaws were found in the graphite2 font library bundled with Thunderbird. A web page containing malicious content could cause Thunderbird to crash or, potentially, execute arbitrary code with the privileges of the user running Thunderbird (CVE-2016-1521, CVE-2016-1522, CVE-2016-1523, CVE-2016-1526).

Thunderbird includes a bundled copy of the graphite2 library, which has been updated in Thunderbird 38.6.0.

This update for MozillaFirefox fixes the following issues:

• update to Firefox 38.6.1 ESR (bsc#967087)
  • MFSA 2016-14/CVE-2016-1523 (bmo#1246093) Vulnerabilities in Graphite 2

This update for MozillaFirefox fixes the following issues:

• update to Firefox 38.6.1 ESR (bsc#967087)
  • MFSA 2016-14/CVE-2016-1523 (bmo#1246093) Vulnerabilities in Graphite 2

This update for MozillaFirefox, MozillaFirefox-branding-SLE, mozilla-nss fixes the following issues:

Firefox 38.6.1 ESR (bsc#967087)

The following vulnerabilities were fixed:

• CVE-2016-1523: Fixed denial of service in Graphite 2 library (MFSA 2016-14/bmo#1246093)

Firefox 38.6.0 ESR + Mozilla NSS 3.20.2. (bsc#963520)

The following vulnerabilities were fixed:

• CVE-2016-1930: Memory safety bugs fixed in Firefox ESR 38.6 (bsc#963632)
• CVE-2016-1935: Buffer overflow in WebGL after out of memory allocation (bsc#963635)
• CVE-2016-1938: Calculations with mp_div and mp_exptmod in Network Security Services (NSS) canproduce wrong results (bsc#963731)
• CVE-2015-7575: MD5 signatures accepted within TLS 1.2 ServerKeyExchange in server signature (bsc#959888)

The following improvements were added:

• bsc#954447: Mozilla NSS now supports a number of new DHE ciphersuites
• Tracking protection is now enabled by default

This update for graphite2 fixes the following issues:

• CVE-2016-1521: The directrun function in directmachine.cpp in Libgraphite did not validate a certain skip operation, which allowed remote attackers to execute arbitrary code, obtain sensitive information, or cause a denial of service (out-of-bounds read and application crash) via a crafted Graphite smart font.

• CVE-2016-1523: The SillMap::readFace function in FeatureMap.cpp in Libgraphite mishandled a return value, which allowed remote attackers to cause a denial of service (missing initialization, NULL pointer dereference, and application crash) via a crafted Graphite smart font.

• CVE-2016-1526: The TtfUtil:LocaLookup function in TtfUtil.cpp in Libgraphite incorrectly validated a size value, which allowed 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.

Yves Younan discovered that graphite2 incorrectly handled certain malformed fonts. If a user or automated system were tricked into opening a specially- crafted font file, a remote attacker could use this issue to cause graphite2 to crash, resulting in a denial of service, or possibly execute arbitrary code.

Karthikeyan Bhargavan and Gaetan Leurent discovered that NSS incorrectly allowed MD5 to be used for TLS 1.2 connections. If a remote attacker were able to perform a machine-in-the-middle attack, this flaw could be exploited to view sensitive information. (CVE-2015-7575)

Yves Younan discovered that graphite2 incorrectly handled certain malformed fonts. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitary code with the privileges of the user invoking Thunderbird. (CVE-2016-1523)

Bob Clary, Christian Holler, Nils Ohlmeier, Gary Kwong, Jesse Ruderman, Carsten Book, and Randell Jesup discovered multiple memory safety issues in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Thunderbird. (CVE-2016-1930)

Aki Helin discovered a buffer overflow when rendering WebGL content in some circumstances. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Thunderbird. (CVE-2016-1935)