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...

Cross-domain data theft via script redirect error message — Mozilla

Google security researcher Chris Evans reported that a website could access a limited amount of data from a different domain by loading a same-domain JavaScript URL which redirects to an off-domain target resource containing data which is not parsable as JavaScript. Upon attempting to load the da...

XMLHttpRequest 302 response disclosure — Mozilla

Marius Schilder of Google Security reported that when a XMLHttpRequest is made to a same-origin resource which 302 redirects to a resource in a different domain, the response from the cross-domain resource is readable by the site issuing the XHR. Cookies marked HttpOnly were not readable, but oth...

Script access to .documentURI and .textContent in mail — Mozilla

Mozilla developer Boris Zbarsky reported that a malicious mail message might be able to glean personal information about the recipient from the mailbox URI such as computer account name if the mail recipient has enabled JavaScript in mail. If a malicious mail is forwarded "in-line" to a recipient...

Crash and remote code execution in nsFrameManager — Mozilla

ling and wushi of team509, via TippingPoint's Zero Day Initiative program, reported a flaw in part of Mozilla's DOM constructing code. This vulnerability can be exploited by modifying certain properties of a file input element before it has finished initializing. When the blur method of the...

Crash and remote code execution via __proto__ tampering — Mozilla

Mozilla developer Jesse Ruderman demonstrated that by tampering with the window.proto.proto object, one can cause the browser to place a lock on a non-native object, leading to a crash. Although we have not demonstrated such control, a determined attacker might be able to exploit this crash to ru...

nsXMLHttpRequest::NotifyEventListeners() same-origin violation — Mozilla

Mozilla security researcher mozbugra4 reported that the same-origin check in nsXMLHttpRequest::NotifyEventListeners could be bypassed. This vulnerability could be used to execute JavaScript in the context of a different website...

Buffer overflow in http-index-format parser — Mozilla

Justin Schuh of the IBM X-Force reported a flaw in the way Mozilla parses the http-index-format MIME type. By sending a specially crafted 200 header line in the HTTP index response, an attacker can cause the browser to crash and run arbitrary code on the victim's computer...

Arbitrary code execution via Flash Player dynamic module unloading — Mozilla

An anonymous security researcher reported via TippingPoint's Zero Day Initiative that insufficient checks were being performed to test whether the Flash module was properly dynamically unloaded. The researcher demonstrated that a SWF file which dynamically unloads itself from an outside JavaScrip...

XSS and JavaScript privilege escalation via session restore — Mozilla

Security researcher David Bloom reported that the browser's session restore feature can be used to violate the same-origin policy and run JavaScript in the context of another site. Any otherwise unexploitable crash can be used to force the user into the session restore state...

-moz-binding property bypasses security checks on codebase principals — Mozilla

Security researcher Collin Jackson reported that the -moz-binding CSS property can be used to bypass security checks which validate codebase principals. Similar to the issue reported in MFSA 2008-23, Jackson demonstrated that an attacker can replace a stylesheet in a signed JAR which uses relativ...

Information stealing via local shortcut files — Mozilla

Security researcher Liu Die Yu of TopsecTianRongXin reported that locally saved .url shortcut files could be used to read information stored in the local cache. An attacker could use this vulnerability to steal information from a victim's browser cache if they were able to get the victim to...

Parsing error in E4X default namespace — Mozilla

Security researcher Chris Evans reported an error in the method used to parse the default namespace in an E4X document. The error was caused by quote characters in the namespace not being properly escaped. The severity of this issue was determined to be low...

Image stealing via canvas and HTTP redirect — Mozilla

Mozilla developer Georgi Guninski reported that the canvas element could be used in conjunction with an HTTP redirect to bypass same-origin restrictions and gain access to the content in arbitrary images from other domains. This vulnerability could be used by an attacker to steal private...

file: URIs inherit chrome privileges when opened from chrome — Mozilla

Security researcher Luke Bryan reported that file: URIs are given chrome privileges when opened in the same tab as a chrome page or privileged about: page. This vulnerability could be used by an attacker to run arbitrary JavaScript with chrome privileges. The severity of this issue was determined...

Crashes with evidence of memory corruption (rv:1.9.0.4/1.8.1.18) — 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...

Heap overflow when canceling newsgroup message — Mozilla

Georgi Guninski reported a buffer overflow in the handling of cancelled newsgroup messages. The error was caused by too small a heap buffer being allocated to store message header information. This buffer could be overrun by an attacker using a specially crafted message which could crash the mail...

BOM characters, low surrogates stripped from JavaScript before execution — Mozilla

Microsoft developer Dave Reed reported that certain BOM characters are stripped from JavaScript code before it is executed. This can lead to code, which would otherwise be treated as part of a quoted string, to be executed. The issue could potentially be used by an attacker to bypass or evade...

resource: traversal vulnerabilities — Mozilla

Mozilla developer Boris Zbarsky reported that the resource: protocol allowed directory traversal on Linux when using URL-encoded slashes...

XBM image uninitialized memory reading — Mozilla

Security researcher Billy Hoffman discovered a bug in the XBM decoder that allowed random small chunks of uninitialized memory to be read. The severity of this bug was low and did not appear to cause any memory corruption...

Privilege escalation via XPCnativeWrapper pollution — Mozilla

Mozilla security researcher mozbugra4 reported a series of vulnerabilities by which page content can pollute XPCNativeWrappers and have arbitrary code run with chrome privileges. One variant reported by mozbugra4 only affected Firefox 2...

Forced mouse drag — Mozilla

Mozilla developer Paul Nickerson reported a variant of a click-hijacking vulnerability discovered in Internet Explorer by Liu Die Yu. The vulnerability allowed an attacker to move the content window while the mouse was being clicked, causing an item to be dragged rather than clicked-on. This issu...

UTF-8 URL stack buffer overflow — Mozilla

Justin Schuh and Tom Cross of the IBM X-Force and Peter Williams of IBM Watson Labs reported errors in Mozilla URL parsing routines. These errors could be exploited using a specially crafted UTF-8 URL in a hyperlink which could overflow a stack buffer and allow an attacker to execute arbitrary co...

nsXMLDocument::OnChannelRedirect() same-origin violation — Mozilla

Mozilla security researcher mozbugra4 reported that the same-origin check in nsXMLDocument::OnChannelRedirect could be bypassed. This vulnerability could be used to execute JavaScript in the context of a different website...

Crashes with evidence of memory corruption (rv:1.9.0.2/1.8.1.17) — 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...

Privilege escalation using feed preview page and XSS flaw — Mozilla

Mozilla security researcher mozbugra4 reported a series of vulnerabilities in feedWriter which allow scripts from page content to run with chrome privileges...

Buffer length checks in MIME processing — Mozilla

As a follow-up to vulnerability reported in MFSA 2008-12 Mozilla has checked similar constructs in the rest of the MIME handling code. Although no further buffer overflows were found we changed several function calls to use safer versions of the string routines that will be more robust in the fac...

Crash with malformed GIF file on Mac OS X — Mozilla

Drew Yao of Apple Product Security reported a vulnerability in Mozilla graphics code which handles GIF rendering in Mac OS X. He demonstrated that a GIF file could be specially crafted to cause the browser to free an uninitialized pointer. An attacker could use this vulnerability to crash the...

Remote code execution by overflowing CSS reference counter — Mozilla

An anonymous researcher, via TippingPoint's Zero Day Initiative program, reported a vulnerability in Mozilla's internal CSSValue array data structure. The vulnerability was caused by an insufficiently sized variable being used as a reference counter for CSS objects. By creating a very large numbe...

Command-line URLs launch multiple tabs when Firefox not running — Mozilla

Security researcher Billy Rios reported that if Firefox is not already running, passing it a command-line URI with pipe "|" symbols will open multiple tabs. This URI splitting could be used to launch chrome: URIs from the command-line, a partial bypass of the fix for MFSA 2005-53 which was intend...

Crash and remote code execution in block reflow — Mozilla

Security research firm Astabis reported a vulnerability in Firefox 2 submitted through the iSIGHT Partners GVP Program by Greg McManus, Primary GVP Researcher. The reported crash in Mozilla's block reflow code could be used by an attacker to crash the browser and run arbitrary code on the victim'...

Peer-trusted certs can use alt names to spoof — Mozilla

Mozilla developer John G. Myers reported a weakness in the trust model used by Mozilla regarding alternate names on self-signed certificates and those with mismatched names that if accepted could be used to spoof a secure connection to any other site. This problem was independently reported by...

Arbitrary socket connections with Java LiveConnect on Mac OS X — Mozilla

Security researcher Gregory Fleischer reported a vulnerability in the way Mozilla indicates the origin of a document to the Java Embedding Plugin JEP that ships with Firefox on Mac OS X. This vulnerability could allow a malicious Java applet to bypass the same-origin policy and create arbitrary...

Chrome script loading from fastload file — Mozilla

Mozilla security researcher mozbugra4 reported that when non-privileged XUL documents include scripts from chrome: URIs used in the browser it was possible to take advantage of the privilege level stored in the pre-compiled "fastload" file. This could allow an attacker to run arbitrary JavaScript...

Arbitrary code execution in mozIJSSubScriptLoader.loadSubScript() — Mozilla

Mozilla security researcher mozbugra4 reported that mozIJSSubScriptLoader.LoadScript only applied XPCNativeWrappers to scripts loaded from standard chrome: URIs. Add-ons using this feature to load scripts from other schemes such as file: or data: typically dynamically generated scripts and chrome...

Signed JAR tampering — Mozilla

Security researchers Collin Jackson and Adam Barth reported a series of vulnerabilities which allow JavaScript to be injected into the context of signed JARs and executed under the context of the JAR's signer. This could allow an attacker to run JavaScript in a victim's browser with the privilege...

Remote site run as local file via Windows URL shortcut — Mozilla

Mozilla community member Geoff reported that URL shortcut files on Windows for example, saved IE favorites could be interpreted as if they were in the local file context when opened by Firefox, although the referenced remote content would be downloaded and displayed. Scripts loaded from the remot...

XSS through JavaScript same-origin violation — Mozilla

Mozilla contributor mozbugra4 submitted a set of vulnerabilities which allow scripts from one document to be executed in the context of a different document. These vulnerabilities could be used by an attacker to violate the same-origin policy and perform an XSS attack against arbitrary sites,...

Faulty .properties file results in uninitialized memory being used — Mozilla

Mozilla developer Daniel Glazman demonstrated that an improperly encoded .properties file in an add-on can result in uninitialized memory being used. This could potentially result in small chunks of data formerly used by other programs being exposed to the add-on code. If the localized string wer...

File location URL in directory listings not escaped properly — Mozilla

Mozilla contributor Masahiro Yamada reported that file URLs in directory listings were not being HTML escaped properly when the filenames contained particular characters. This resulted in files from directory listings being opened in unintended ways or files not being able to be opened by the...

Crashes with evidence of memory corruption (rv:1.8.1.15) — 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...

Arbitrary file upload via originalTarget and DOM Range — Mozilla

Opera Software reported a vulnerability which allows malicious content to force the browser into uploading local files to the remote server. This could be used by an attacker to steal files from known locations on a victim's computer...

Crash in JavaScript garbage collector — Mozilla

Fixes for security problems in the JavaScript engine described in MFSA 2008-15 CVE-2008-1237 introduced a stability problem, where some users experienced crashes during JavaScript garbage collection. This is being fixed primarily to address stability concerns. We have no demonstration that this...

Privacy issue with SSL Client Authentication — Mozilla

Peter Brodersen and Alexander Klink independently reported that the default setting for SSL Client Authentication, automatically selecting a client certificate on behalf of the user, creates a potential privacy issue for users by allowing tracking through client certificates. For users who alread...

HTTP Referrer spoofing with malformed URLs — Mozilla

Security researcher Gregory Fleischer demonstrated a problem with the HTTP Referer: sic header sent with requests to URLs containing Basic Authentication credentials with empty usernames. In these cases a number of leading characters, based on the length of the password in the URL, are removed fr...

Crashes with evidence of memory corruption (rv:1.8.1.13) — 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...

Java socket connection to any local port via LiveConnect — Mozilla

Security researcher Gregory Fleischer demonstrated that web content fetched via the jar: protocol can use Java via LiveConnect to open socket connections to arbitrary ports on the user's machine "localhost". The issue is caused by improper parsing of the content origin passed from the browser to...

Multiple XSS vulnerabilities from character encoding — Mozilla

WebKit developer Alexey Proskuryakov reported that the Mozilla HTML parser treated the backspace character as whitespace contrary to the HTML specification and different from other browsers. This difference might lead to Cross-site Scripting XSS risks on sites which filtered input in accordance...

XUL popup spoofing variant (cross-tab popups) — Mozilla

Mozilla contributor Chris Thomas demonstrated that it was possible to have a background tab create a borderless XUL pop-up in front of the active tab in the user's browser. This technique could be used by an attacker to spoof form elements such as a login prompt for a site opened in a different t...

JavaScript privilege escalation and arbitrary code execution — Mozilla

Mozilla contributors mozbugra4, Boris Zbarsky, and Johnny Stenback reported a series of vulnerabilities which allow scripts from page content to run with elevated privileges. mozbugra4 demonstrated additional variants of MFSA 2007-25 and MFSA2007-35 arbitrary code execution through XPCNativeWrapp...