CIS CYBER SECURITY ADVISORIES

MS-ISAC CYBER SECURITY ADVISORY NUMBER:
2014-088

DATE(S) ISSUED:
10/14/2014

SUBJECT:
Multiple Vulnerabilities in Mozilla Firefox and Thunderbird Could Allow for Remote Code Execution

OVERVIEW:

Multiple vulnerabilities have been identified in Mozilla Firefox and Thunderbird that could allow for remote code execution. Mozilla Firefox is a web browser used to access the Internet and Mozilla Thunderbird is an email client. Successful exploitation of these vulnerabilities could result in an attacker gaining the same privileges as the logged on user, or gaining session authentication credentials. Depending on the privileges associated with the user, an attacker could install programs; view, change, or delete data; or create new accounts with full user rights.

THREAT INTELLIGENCE

There are currently no reports of these vulnerabilities being exploited in the wild.

SYSTEMS AFFECTED:

  • Mozilla Firefox
  • Mozilla Firefox Extended Support Release (ESR)
  • Mozilla Thunderbird

RISK:

Government:

  • Large and medium government entities:High
  • Small government entities:High

Businesses:

  • Large and medium business entities:High
  • Small business entities:High

Home users: High

TECHNICAL SUMMARY:

Nine vulnerabilities have been reported in Mozilla Firefox and Thunderbird. Details of the vulnerabilities are as follows:

  • A same-origin policy bypass issue when accessing cross-origin objects via the Alarms API. [CVE-2014-1583, MFSA 2014-82]
  • A privacy issue where with inconsistent video sharing in iframes. [CVE-2014-1585, CVE-2014-1586, MFSA 2014-81]
  • A security bypass issue that allows the bypass of key pinning. [CVE-2014-1584, CVE-2014-1582, MFSA 2014-80]
  • A use after free vulnerability during text layout when interacting with text direction [CVE-2014-1581, MFSA 2014-79]
  • An uninitialized memory issue when a malformed GIF image is repeatedly rendered within a canvas element [CVE-2014-1580, MFSA 2014-78]
  • An out-of-bounds write issue when buffering WebM format video containing frames with invalid tile sizes. [CVE-2014-1578, MFSA 2014-77]
  • An out-of-bounds read issue with Web Audio when interacting with custom waveforms with invalid values. [CVE-2014-1577, MFSA 2014-76]
  • A buffer overflow vulnerability when making capitalization style changes during CSS parsing. [CVE-2014-1576, MFSA 2014-75]
  • Several memory safety bugs in in the browser engine used in Firefox and other Mozilla-based products. [CVE-2014-1574, CVE-2014-1575 MFSA 2014-74]

Successful exploitation of these vulnerabilities could result in an attacker gaining the same privileges as the logged on user, or gaining session authentication credentials. Depending on the privileges associated with the user, an attacker could install programs; view, change, or delete data; or create new accounts with full user rights.

RECOMMENDATIONS:

We recommend the following actions be taken:

  • Apply appropriate patches provided by Mozilla to vulnerable systems immediately after appropriate testing.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
  • Remind users not to click links from unknown sources, or to click links without verifying the intended destination.

REFERENCES:

Mozilla:

https://www.mozilla.org/security/announce/2014/mfsa2014-82.html

https://www.mozilla.org/security/announce/2014/mfsa2014-81.html

https://www.mozilla.org/security/announce/2014/mfsa2014-80.html

https://www.mozilla.org/security/announce/2014/mfsa2014-79.html

https://www.mozilla.org/security/announce/2014/mfsa2014-78.html

https://www.mozilla.org/security/announce/2014/mfsa2014-77.html

https://www.mozilla.org/security/announce/2014/mfsa2014-76.html

https://www.mozilla.org/security/announce/2014/mfsa2014-75.html

https://www.mozilla.org/security/announce/2014/mfsa2014-74.html

CVE:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1586

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1585

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1584

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1583

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1582

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1581

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1580

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1578

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1577

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1576

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1575

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1574

Security Focus:

http://www.securityfocus.com/bid/70431

http://www.securityfocus.com/bid/70434

http://www.securityfocus.com/bid/70432

http://www.securityfocus.com/bid/70439

http://www.securityfocus.com/bid/70436

http://www.securityfocus.com/bid/70425

http://www.securityfocus.com/bid/70440

http://www.securityfocus.com/bid/70430

http://www.securityfocus.com/bid/70428

http://www.securityfocus.com/bid/70424