USN-1049-1 fixed vulnerabilities in Firefox and Xulrunner. That update introduced a regression where some Java applets would fail to load.
This update fixes the problem.

We apologize for the inconvenience.

Jesse Ruderman, Igor Bukanov, Olli Pettay, Gary Kwong, Jeff Walden, Henry Sivonen, Martijn Wargers, David Baron and Marcia Knous discovered several memory issues in the browser engine. An attacker could exploit these to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0053, CVE-2011-0062)

Zach Hoffman discovered that a recursive call to eval() wrapped in a try/catch statement places the browser into a inconsistent state. An attacker could exploit this to force a user to accept any dialog. (CVE-2011-0051)

It was discovered that memory was used after being freed in a method used by JSON.stringify. An attacker could exploit this to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0055)

Christian Holler discovered multiple buffer overflows in the JavaScript engine. An attacker could exploit these to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0054, CVE-2011-0056)

Daniel Kozlowski discovered that a JavaScript Worker kept a reference to memory after it was freed. An attacker could exploit this to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0057)

Alex Miller discovered a buffer overflow in the browser rendering engine. An attacker could exploit this to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0058)

Roberto Suggi Liverani discovered a possible issue with unsafe JavaScript execution in chrome documents. A malicious extension could exploit this to execute arbitrary code with chrome privlieges. (CVE-2010-1585)

Jordi Chancel discovered a buffer overlow in the JPEG decoding engine. An attacker could exploit this to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0061)

Peleus Uhley discovered a CSRF vulnerability in the plugin code related to 307 redirects. This could allow custom headers to be forwarded across origins. (CVE-2011-0059).

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.

Mozilla XULRunner 1.9.1 has been updated to version 1.9.1.17, fixing the following security issues :

  - Several memory safety bugs in the browser engine used in     Firefox and other Mozilla-based products have been     identified and fixed. Some of these bugs showed evidence     of memory corruption under certain circumstances, and it     is assumed that with enough effort at least some of     these could be exploited to run arbitrary code. (MFSA     2010-74 / CVE-2010-3777)

  - Several memory safety bugs in the browser engine used in     Firefox and other Mozilla-based products have been     identified and fixed. Some of these bugs showed evidence     of memory corruption under certain circumstances, and it     is assumed that with enough effort at least some of     these could be exploited to run arbitrary code. (MFSA     2011-01 / CVE-2011-0053 / CVE-2011-0062)

  - A recursive call to eval() wrapped in a try/catch     statement places the browser into a inconsistent state.
    Any dialog box opened in this state is displayed without     text and with non-functioning buttons. Closing the     window causes the dialog to evaluate to true. An     attacker could use this issue to force a user into     accepting any dialog, such as one granting elevated     privileges to the page presenting the dialog. (MFSA     2011-02 / CVE-2011-0051)

  - A method used by JSON.stringify contains a     use-after-free error in which a currently in-use pointer     was freed and subsequently dereferenced. This could lead     to arbitrary code execution if an attacker is able to     store malicious code in the freed section of memory.
    (MFSA 2011-03 / CVE-2011-0055)

  - The JavaScript engine's internal memory mapping of     non-local JS variables contains a buffer overflow which     could potentially be used by an attacker to run     arbitrary code on a victim's computer. (MFSA 2011-04 /     CVE-2011-0054)

  - The JavaScript engine's internal mapping of string     values contains an error in cases where the number of     values being stored is above 64K. In such cases an     offset pointer is manually moved forwards and backwards     to access the larger address space. If an exception is     thrown between the time that the offset pointer was     moved forward and the time it gets reset, the exception     object would be read from an invalid memory address,     potentially executing attacker-controlled memory. (MFSA     2011-05 / CVE-2011-0056)

  - A JavaScript Worker could be used to keep a reference to     an object that could be freed during garbage collection.
    Subsequent calls through this deleted reference could     cause attacker-controlled memory to be executed on a     victim's computer. (MFSA 2011-06 / CVE-2011-0057)

  - When very long strings are constructed and inserted into     an HTML document, the browser incorrectly constructs the     layout objects used to display the text. Under such     conditions an incorrect length would be calculated for a     text run resulting in too small of a memory buffer being     allocated to store the text. This issue could be used by     an attacker to write data past the end of the buffer and     execute malicious code on a victim's computer. It     affects only Mozilla browsers on Windows. (MFSA 2011-07     / CVE-2011-0058)

  - ParanoidFragmentSink, a class used to sanitize     potentially unsafe HTML for display, allows javascript:
    URLs and other inline JavaScript when the embedding     document is a chrome document. While there are no unsafe     uses of this class in any released products, extension     code could potentially use it in an unsafe manner. (MFSA     2011-08 / CVE-2010-1585)

  - When plugin-initiated requests receive a 307 redirect     response, the plugin is not notified and the request is     forwarded to the new location. This is true even for     cross-site redirects, so any custom headers that were     added as part of the initial request would be forwarded     intact across origins. This poses a CSRF risk for web     applications that rely on custom headers only being     present in requests from their own origin. (MFSA 2011-10     / CVE-2011-0059)

A flaw was found in the way SeaMonkey handled dialog boxes. An attacker could use this flaw to create a malicious web page that would present a blank dialog box that has non-functioning buttons. If a user closes the dialog box window, it could unexpectedly grant the malicious web page elevated privileges. (CVE-2011-0051)

Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause SeaMonkey to crash or, potentially, execute arbitrary code with the privileges of the user running SeaMonkey. (CVE-2011-0053)

A flaw was found in the way SeaMonkey handled plug-ins that perform HTTP requests. If a plug-in performed an HTTP request, and the server sent a 307 redirect response, the plug-in was not notified, and the HTTP request was forwarded. The forwarded request could contain custom headers, which could result in a Cross Site Request Forgery attack.
(CVE-2011-0059)

After installing the update, SeaMonkey must be restarted for the changes to take effect.

Several flaws were found in the processing of malformed HTML content.
Malicious HTML content could cause Thunderbird to crash or, potentially, execute arbitrary code with the privileges of the user running Thunderbird. (CVE-2010-1585, CVE-2011-0053, CVE-2011-0062)

A flaw was found in the way Thunderbird handled malformed JPEG images.
An HTML mail message containing a malicious JPEG image could cause Thunderbird to crash or, potentially, execute arbitrary code with the privileges of the user running Thunderbird. (CVE-2011-0061)

All running instances of Thunderbird must be restarted for the update to take effect.

The remote Oracle Linux 6 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2011-0311 advisory.

    [3.1.8-4.0.2.el6_0]
    - Replace clean.gif in tarball

    [3.1.8-4.0.1.el6_0]
    - Replaced thunderbird-redhat-default-prefs.js with thunderbird-oracle-default-prefs.js

    [3.1.8-4]
    - Update to build3

    [3.1.8-3]
    - Update to build2

    [3.1.8-2]
    - Update to 3.1.8

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
52579	Ubuntu 8.04 LTS / 9.10 / 10.04 LTS / 10.10 : firefox, firefox-{3.0,3.5}, xulrunner-1.9.2 regression (USN-1049-2)	Nessus	Ubuntu Local Security Checks	3/8/2011	9/19/2019	critical
52652	SuSE 10 Security Update : mozilla-xulrunner191 (ZYPP Patch Number 7363)	Nessus	SuSE Local Security Checks	3/14/2011	1/19/2021	critical
60974	Scientific Linux Security Update : seamonkey on SL4.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	8/1/2012	1/14/2021	critical
60976	Scientific Linux Security Update : thunderbird on SL6.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	8/1/2012	1/14/2021	critical
68214	Oracle Linux 6 : thunderbird (ELSA-2011-0311)	Nessus	Oracle Linux Local Security Checks	7/12/2013	10/23/2024	critical

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