Heap overflow in certificate regexp parsing — Mozilla

Moxie Marlinspike reported a heap overflow vulnerability in the code that handles regular expressions in certificate names. This vulnerability could be used to compromise the browser and run arbitrary code by presenting a specially crafted certificate to the client. This code provided compatibili...

Compromise of SSL-protected communication — Mozilla

IOActive security researcher Dan Kaminsky reported a mismatch in the treatment of domain names in SSL certificates between SSL clients and the Certificate Authorities CA which issue server certificates. In particular, if a malicious person requested a certificate for a host name with an invalid...

Data corruption with SOCKS5 reply containing DNS name longer than 15 characters — Mozilla

Andrej Andolsek reported that when Firefox receives a reply from a SOCKS5 proxy which contains a DNS name longer than 15 characters, the subsequent data stream in the response can become corrupted. There was no evidence of memory corruption, however, and the severity of the issue was determined t...

Crashes with evidence of memory corruption (rv:1.9.1/1.9.0.12) — Mozilla

Mozilla developers and community members identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some ...

setTimeout loses XPCNativeWrappers — Mozilla

Mozilla developer Blake Kaplan reported that setTimeout, when called with certain object parameters which should be protected with a XPCNativeWrapper, will fail to keep the object wrapped when compiling the new function to be executed. If chrome privileged code were to call setTimeout using this ...

Multiple cross origin wrapper bypasses — Mozilla

Mozilla security researcher mozbugra4 reported a series of vulnerabilities in which objects that normally receive a XPCCrossOriginWrapper are constructed without the wrapper. This can lead to cases where JavaScript from one website may unsafely access properties of such an object which had been s...

Crash and remote code execution using watch and __defineSetter__ on SVG element — Mozilla

Security researcher PenPal reported a crash involving a SVG element on which a watch function and defineSetter function have been set for a particular property. The crash showed evidence of memory corruption and could potentially be used by an attacker to run arbitrary code on a victim's computer...

Crash and remote code execution during Flash player unloading — Mozilla

Security researcher Attila Suszter reported that when a page contains a Flash object which presents a slow script dialog, and the page is navigated while the dialog is still visible to the user, the Flash plugin is unloaded resulting in a crash due to a call to the deleted object. This crash coul...

Heap/integer overflows in font glyph rendering libraries — Mozilla

oCERT security researcher Will Drewry reported a series of heap and integer overflow vulnerabilities which independently affected multiple font glyph rendering libraries. On Linux platforms libpango was susceptible to the vulnerabilities while on OS X CoreGraphics was similarly vulnerable. An...

Corrupt JIT state after deep return from native function — Mozilla

Firefox user zbyte reported a crash that we determined could result in an exploitable memory corruption problem. In certain cases after a return from a native function, such as escape, the Just-in-Time JIT compiler could get into a corrupt state. This could be exploited by an attacker to run...

Crash viewing multipart/alternative message with text/enhanced part — Mozilla

Bernd Jendrissek reported a crash in Thunderbird when viewing a multipart/alternative mail message with a text/enhanced part. Internally this led to operations on an unexpected type of object resulting in a crash which may be exploitable...

URL spoofing with invalid unicode characters — Mozilla

Mozilla add-on developer Pavel Cvrcek reported that certain invalid unicode characters, when used as part of an IDN, are displayed as whitespace in the location bar. This whitespace could be used to force part of the URL out of view in the location bar. An attacker could use this vulnerability to...

Incorrect principal set for file: resources loaded via location bar — Mozilla

Security researchers Adam Barth and Collin Jackson reported that when a file: resource is loaded via the location bar it inherits the principal of the previously loaded document. This vulnerability can potentially give the newly loaded document additional privileges to access the contents of othe...

Arbitrary domain cookie access by local file: resources — Mozilla

Security researcher Gregory Fleischer reported that local resources loaded via the file: protocol can access any domain's cookies which have been saved on a user's machine. Fleischer demonstrated that a local document's domain was being calculated incorrectly from its URL. If a victim could be...

Arbitrary code execution using event listeners attached to an element whose owner document is null — Mozilla

Mozilla security researcher mozbugra4 reported that the owner document of an element can become null after garbage collection. In such cases, event listeners may be executed within the wrong JavaScript context. An attacker could potentially use this vulnerability to have a malicious event handler...

Race condition while accessing the private data of a NPObject JS wrapper class object — Mozilla

Jakob Balle and Carsten Eiram of Secunia Research reported a race condition in NPObjWrapperNewResolve when accessing the properties of a NPObject, a wrapped JSObject. Balle and Eiram demonstrated that this condition could be reached by navigating away from a web page during the loading of a Java...

XUL scripts bypass content-policy checks — Mozilla

Mozilla add-on developer and community member Wladimir Palant reported that content-loading policies were not checked before loading external script files into XUL documents. The severity of this problem would depend on the reasons behind the content policy check, which include privacy from "web...

SSL tampering via non-200 responses to proxy CONNECT requests — Mozilla

Microsoft security researchers Shuo Chen, Ziqing Mao, Yi-Min Wang, and Ming Zhang reported that when a CONNECT request is sent to a proxy server and a non-200 response is returned, then the body of the response is incorrectly rendered within the context of the request Host: header. An active...

JavaScript chrome privilege escalation — Mozilla

Mozilla security researcher mozbugra4 reported a vulnerability which allows scripts from page content to run with elevated privileges. Using this vulnerability, an attacker could cause a chrome privileged object, such as the browser sidebar or the FeedWriter, to interact with web content in such ...

Crashes with evidence of memory corruption (rv:1.9.0.11) — Mozilla

Mozilla developers and community members identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some ...

Crash in nsTextFrame::ClearTextRun() — Mozilla

One of the security fixes in Firefox 3.0.9 introduced a regression that caused some users to experience frequent crashes. Users of the HTML Validator add-on were particularly affected, but other users also experienced this crash in some situations. In analyzing this crash we discovered that it wa...

POST data sent to wrong site when saving web page with embedded frame — Mozilla

Developer and Mozilla community member Paolo Amadini reported that when saving the inner frame of a web page as a file when the outer page has POST data associated with it, the POST data will be incorrectly sent to the URL of the inner frame. This could potentially result in a user's sensitive da...

Crashes with evidence of memory corruption (rv:1.9.0.9) — Mozilla

Mozilla developers identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be...

Same-origin violations in XMLHttpRequest and XPCNativeWrapper.toString — Mozilla

Mozilla security researcher mozbugra4 reported that it is possible to create a document whose URI does not match the document's principal using XMLHttpRequest. This type of mismatch leads to incorrect results in principal-based security checks. An attacker could use this vulnerability to execute...

XSS hazard using third-party stylesheets and XBL bindings — Mozilla

Web developer Cefn Hoile reported that sites which allow users to embed third-party stylesheets are vulnerable to script injection attacks using XBL bindings. While this behavior was documented previously, it was determined that this particular risk was not well-understood by some websites. To...

URL spoofing with box drawing character — Mozilla

Bjoern Hoehrmann and security researcher Moxie Marlinspike independently reported that Unicode box drawing characters were allowed in Internationalized Domain Names IDN where they could be visually confused with punctuation used in valid web addresses. This could be combined with a phishing-type...

Same-origin violations when Adobe Flash loaded via view-source: scheme — Mozilla

Security researcher Gregory Fleischer reported that when an Adobe Flash file is loaded via the view-source: scheme, the Flash plugin misinterprets the origin of the content as localhost, leading to two specific vulnerabilities:...

Firefox allows Refresh header to redirect to javascript: URIs — Mozilla

Mozilla community member Michael reported that when a server responds with a Refresh header containing a javascript: URI, Firefox will redirect to the javascript: URI. If an attacker could inject a Refresh header into a server response, or could control the value that a site places in the Refresh...

Malicious search plugins can inject code into arbitrary sites — Mozilla

Security researcher Prateek Saxena reported that a malicious MozSearch plugin could be created using a javascript: URI in the SearchForm value. This URI is used as the default landing page when an empty search is performed. If an attacker could get a user to install the malicious plugin and perfo...

jar: scheme ignores the content-disposition: header on the inner URI — Mozilla

Mozilla developer Daniel Veditz reported that when the jar: scheme is used to wrap a URI which serves the content with Content-Disposition: attachment, the HTTP header is ignored and the content is unpacked and displayed inline. A site may depend on this HTTP header to prevent potentially untrust...

XSL Transformation vulnerability — Mozilla

Security researcher Guido Landi discovered that a XSL stylesheet could be used to crash the browser during a XSL transformation. An attacker could potentially use this crash to run arbitrary code on a victim's computer...

Arbitrary code execution via XUL tree element — Mozilla

Security researcher Nils reported via TippingPoint's Zero Day Initiative that the XUL tree method moveToEdgeShift was in some cases triggering garbage collection routines on objects which were still in use. In such cases, the browser would crash when attempting to access a previously destroyed...

Crashes with evidence of memory corruption (rv:1.9.0.7) — Mozilla

Mozilla developers identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be...

Upgrade PNG library to fix memory safety hazards — Mozilla

Google security researcher Tavis Ormandy reported several memory safety hazards to the libpng project, an external library used by Mozilla to render PNG images. These vulnerabilities could be used by a malicious website to crash a victim's browser and potentially execute arbitrary code on their...

Mozilla Firefox XUL Linked Clones Double Free Vulnerability — Mozilla

An anonymous researcher, via TippingPoint's Zero Day Initiative program, reported a vulnerability in Mozilla's garbage collection process. The vulnerability was caused by improper memory management of a set of cloned XUL DOM elements which were linked as a parent and child. After reloading the...

XML data theft via RDFXMLDataSource and cross-domain redirect — Mozilla

Mozilla security researcher Georgi Guninski reported that a website could use nsIRDFService and a cross-domain redirect to steal arbitrary XML data from another domain, a violation of the same-origin policy. This vulnerability could be used by a malicious website to steal private data from users...

URL spoofing with invisible control characters — Mozilla

Mozilla contributor Masahiro Yamada reported that certain invisible control characters were being decoded when displayed in the location bar, resulting in fewer visible characters than were present in the actual location. An attacker could use this vulnerability to spoof the location bar and...

Local file stealing with SessionStore — Mozilla

Mozilla security researcher mozbugra4 reported that a form input control's type could be changed during the restoration of a closed tab. An attacker could set an input control's text value to the path of a local file whose location was known to the attacker. If the tab was then closed and the...

XSS using a chrome XBL method and window.eval — Mozilla

Mozilla security researcher mozbugra4 reported that a chrome XBL method can be used in conjunction with window.eval to execute arbitrary JavaScript within the context of another website, violating the same origin policy...

Crashes with evidence of memory corruption (rv:1.9.0.6) — Mozilla

Mozilla developers identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be...

Chrome privilege escalation via local .desktop files — Mozilla

Mozilla security researcher Georgi Guninski reported that the fix for an earlier vulnerability reported by Liu Die Yu using local internet shortcut files to access other sites MFSA 2008-47 could be bypassed by redirecting to a privileged about: URI such as about:plugins. If an attacker could get ...

Directives to not cache pages ignored — Mozilla

Paul Nel reported that certain HTTP directives to not cache web pages, Cache-Control: no-store and Cache-Control: no-cache for HTTPS pages, were being ignored by Firefox 3. On a shared system, applications relying upon these HTTP directives could potentially expose private data. Another user on t...

XMLHttpRequest allows reading HTTPOnly cookies — Mozilla

Developer and Mozilla community member Wladimir Palant reported that cookies marked HTTPOnly were readable by JavaScript via the XMLHttpRequest.getResponseHeader and XMLHttpRequest.getAllResponseHeaders APIs. This vulnerability bypasses the security mechanism provided by the HTTPOnly flag which...

Additional XSS attack vectors in feed preview — Mozilla

Mozilla security researcher mozbugra4 reported an additional variation on the feed preview vulnerabilities fixed in Firefox 2.0.0.17. mozbugra4 demonstrated that it was still possible to use the feed preview as a vector for JavaScript privilege escalation. An attacker could use this issue to run...

User tracking via XUL persist attribute — Mozilla

Security researcher Hish reported that the persist attribute in XUL elements can be used to store cookie-like information on a user's computer which could later be read by a website. This creates a privacy issue for users who have a non-standard cookie preference and wish to prevent sites from...

XSS vulnerabilities in SessionStore — Mozilla

Mozilla security researcher mozbugra4 reported vulnerabilities in the session-restore feature by which content could be injected into an incorrect document storage location, including storage locations for other domains. An attacker could utilize these issues to violate the browser's same-origin...

Crashes with evidence of memory corruption (rv:1.9.0.5/1.8.1.19) — Mozilla

Mozilla developers identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be...

Escaped null characters ignored by CSS parser — Mozilla

Kojima Hajime reported that unlike literal null characters which were handled correctly, the escaped form '\0' was ignored by the CSS parser and treated as if it was not present in the CSS input string. This issue could potentially be used to bypass script sanitization routines in web application...

Information stealing via loadBindingDocument — Mozilla

Mozilla developer Boris Zbarsky reported that XBL bindings could be used to read data from other domains, a violation of the same-origin policy. The severity of this issue was determined to be moderate due to several mitigating factors:...

Errors parsing URLs with leading whitespace and control characters — Mozilla

Perl developer Chip Salzenberg reported that certain control characters, when placed at the beginning of a URL, would lead to incorrect parsing resulting in a malformed URL being output by the parser. IBM researchers Justin Schuh, Tom Cross, and Peter William also reported a related symptom as pa...