SPDY information disclosure — Mozilla

Security researchers Thai Duong and Juliano Rizzo reported that SPDY's request header compression leads to information leakage, which can allow the extraction of private data such as session cookies, even over an encrypted SSL connection...

XSS through data: URLs — Mozilla

Mozilla security researcher mozbugra4 reported a cross-site scripting XSS attack through the context menu using a data: URL. In this issue, context menu functionality "View Image", "Show only this frame", and "View background image" are disallowed in a javascript: URL but allowed in a data: URL,...

Invalid frees causes heap corruption in gfxImageSurface — Mozilla

Using the Address Sanitizer tool, security researcher Atte Kettunen from OUSPG found a heap corruption in gfxImageSurface which allows for invalid frees and possible remote code execution. This happens due to float error, resulting from graphics values being passed through different number system...

Security issues addressed in Firefox 3.6.20 — Mozilla

Miscellaneous memory safety hazards rv:1.9.2.20 Impact: Critical Description: Mozilla developers and community members identified and fixed several memory safety bugs in the browser engine used in Firefox 3.6 and other Mozilla-based products. Some of these bugs showed evidence of memory corruptio...

Use-after-free vulnerability when viewing XUL document with script disabled — Mozilla

Security researcher Martin Barbella reported that under certain conditions, viewing a XUL document while JavaScript was disabled caused deleted memory to be accessed. This flaw could potentially be used by an attacker to crash a victim's browser and run arbitrary code on their computer...

Crashes with evidence of memory corruption (rv:1.9.2.2/ 1.9.1.9/ 1.9.0.19) — 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...

Security Vulnerabilities fixed in Firefox ESR 115.10 — Mozilla

GetBoundName could return the wrong version of an object when JIT optimizations were applied. In some code patterns the JIT incorrectly optimized switch statements and generated code with out-of-bounds-reads. The JIT created incorrect code for arguments in certain cases. This led to potential...

Security vulnerabilities fixed in Firefox 50.0.1 — Mozilla

Redirection from an HTTP connection to a data: URL assigns the referring site's origin to the data: URL in some circumstances. This can result in same-origin violations against a domain if it loads resources from malicious sites. Cross-origin setting of cookies has been demonstrated without the...

Scripts on marquee tag can execute in sandboxed iframes — Mozilla

Security researcher Nikita Arykov reported that JavaScript event handler attributes on a tag will execute inside a sandboxed iframe that does not have the allow-scripts flag set. This could result in a cross-site scripting XSS vulnerability in a site that depends on the iframe sandbox for...

Java applets bypass CSP protections — Mozilla

Mozilla engineer Matt Wobensmith reported that Content Security Policy CSP does not block the loading of cross-domain Java applets when specified by policy. This is because the Java applet is loaded by the Java plugin, which then mediates all network requests without checking against CSP. This...

Buffer overflow during ASN.1 decoding in NSS — Mozilla

Security researcher Francis Gabriel of Quarkslab reported a heap-based buffer overflow in the way the Network Security Services NSS libraries parsed certain ASN.1 structures. An attacker could create a specially-crafted certificate which, when parsed by NSS, would cause it to crash or execute...

Errors in mp_div and mp_exptmod cryptographic functions in NSS — Mozilla

Security researcher Hanno Böck reported that calculations with mpdiv and mpexptmod in Network Security Services NSS can produce wrong results in some circumstances. These functions are used within NSS for a variety of cryptographic division functions, leading to potential cryptographic weaknesses...

Memory leak in mozTCPSocket to servers — Mozilla

Security researcher David Chan reported that Mozilla's mozTCPSocket implementation could leak data past the end of an array, allowing for the potential exposure of memory or private data to malicious servers...

Uninitialized memory use during GIF rendering — Mozilla

Google security researcher Michal Zalewski discovered that when a malformated GIF image is rendered in certain circumstances, memory is not properly initialized before use. The resulting image then uses this memory during rendering. This could allow for the a script in web content to access this...

Miscellaneous memory safety hazards (rv:24.0 / rv:17.0.9) — Mozilla

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

Buffer overflow while rendering GIF images — Mozilla

Security researcher Atte Kettunen from OUSPG used the Address Sanitizer tool to discover a buffer overflow while rendering GIF format images. This issue is potentially exploitable and could lead to arbitrary code execution...

DOS and crash with full screen and history navigation — Mozilla

Security researcher Soroush Dalili reported that a combination of invoking full screen mode and navigating backwards in history could, in some circumstances, cause a hang or crash due to a timing dependent use-after-free pointer reference. This crash may be potentially exploitable...

Miscellaneous memory safety hazards (rv:14.0/ rv:10.0.6) — Mozilla

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

JSDependentString::undepend string conversion results in memory corruption — Mozilla

Security researcher Bill Keese reported a memory corruption. This is caused by JSDependentString::undepend changing a dependent string into a fixed string when there are additional dependent strings relying on the same base. When the undepend occurs during conversion, the base data is freed,...

Security Vulnerabilities fixed in Firefox ESR 115.26 — Mozilla

On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. On arm64, a WASM brtable instruction with a lot of entries could lead to the label being too far from the instruction causing truncation and incorrec...

Security vulnerabilities fixed in Thunderbird 60.4 — Mozilla

A buffer overflow and out-of-bounds read can occur in TextureStorage11 within the ANGLE graphics library, used for WebGL content. This results in a potentially exploitable crash. A use-after-free vulnerability can occur after deleting a selection element due to a weak reference to the select...

Crash when accessing HTML tables with accessibility tools on OS X — Mozilla

Mozilla developer Frédéric Wang reported an issue affecting accessibility tools on OS X. This occurs when when an accessibility tool requests the index of a table row through the NSAccessibilityIndexAttribute value. This was caused by an error in how HTML tables are exposed to accessibility tools...

Buffer underflow during MP3 playback — Mozilla

Security researcher Atte Kettunen used the Address Sanitizer tool to discover a buffer underflow during audio playback of a badly formatted MP3 audio files. Through memory allocation manipulation it may be possible to incorporate parts of Firefox memory into an MP3 stream accessible to scripts on...

Inconsistent video sharing within iframe — Mozilla

Mozilla developers Eric Shepherd and Jan-Ivar Bruaroey reported issues with privacy and video sharing using WebRTC. Once video sharing has started within a WebRTC session running within an , video will continue to be shared even if the user selects the Stop Sharing" button in the controls. The...

Miscellaneous memory safety hazards (rv:31.0 / rv:24.7) — Mozilla

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

Buffer overflow in Web Audio Speex resampler — Mozilla

Security researcher Holger Fuhrmannek used the used the Address Sanitizer tool to discover a buffer overflow with the Speex resampler in Web Audio when working with audio content that exceeds expected bounds. This leads to a potentially exploitable crash...

Profile path leaks to Android system log — Mozilla

Mozilla developer Roee Hay reported that Firefox for Android profile paths leak to the Android system log. When running on Android 4.2 or earlier, other applications are able to read these log files, leading to information disclosure from the user's profile directory. This issue was also...

Memory corruption found using Address Sanitizer — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team used the Address Sanitizer tool to discover a series of use-after-free, out of bounds read, and invalid write problems rated as moderate to critical as security issues in shipped software. Some of these issues are...

Use-after-free with video and onresize event — Mozilla

Security researcher Nils reported a use-after-free when resizing video while playing. This could allow for arbitrary code execution...

Miscellaneous memory safety hazards (rv:20.0 / rv:17.0.5) — Mozilla

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

Page load short-circuit can lead to XSS — Mozilla

Security researchers Jordi Chancel and Eddy Bordi reported that they could short-circuit page loads to show the address of a different site than what is loaded in the window in the addressbar. Security researcher Chris McGowen independently reported the same flaw, and further demonstrated that th...

Potential memory corruption during font rendering using cairo-dwrite — Mozilla

Security research firm iDefense reported that researcher wushi of team509 discovered a memory corruption on Windows Vista and Windows 7 systems with hardware acceleration disabled or using incompatible video drivers. This is created by using cairo-dwrite to attempt to render fonts on an unsupport...

Potential site identity spoofing when loading RSS and Atom feeds — Mozilla

Security researcher Jeroen van der Gun reported that if RSS or Atom XML invalid content is loaded over HTTPS, the addressbar updates to display the new location of the loaded resource, including SSL indicators, while the main window still displays the previously loaded content. This allows for...

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...

Security Vulnerabilities fixed in Thunderbird 115.12 — Mozilla

Memory corruption in the networking stack could have led to a potentially exploitable crash. If a garbage collection was triggered at the right time, a use-after-free could have occurred during object transplant. By monitoring the time certain operations take, an attacker could have guessed which...

Security Vulnerabilities fixed in Firefox ESR 115.9 — Mozilla

An unchecked return value in TLS handshake code could have caused a potentially exploitable crash. An attacker could have leveraged the Windows Error Reporter to run arbitrary code on the system escaping the sandbox. Note: This issue only affected Windows operating systems. Other operating system...

Security Vulnerabilities fixed in Thunderbird 78 — Mozilla

When %2F was present in a manifest URL, Thunderbird's AppCache behavior may have become confused and allowed a manifest to be served from a subdirectory. This could cause the appcache to be used to service requests for the top level directory. A VideoStreamEncoder may have been freed in a race...

Security vulnerabilities fixed in Firefox ESR 45.8 — Mozilla

JIT-spray targeting asm.js combined with a heap spray allows for a bypass of ASLR and DEP protections leading to potential memory corruption attacks. A crash triggerable by web content in which an ErrorResult references unassigned memory due to a logic error. The resulting crash may be exploitabl...

Buffer overflow in ClearKey Content Decryption Module (CDM) during video playback — Mozilla

An anonymous security researcher working with Trend Micro's Zero Day Initiative reported a buffer overflow in the ClearKey Content Decryption Module CDM used by the Encrypted Media Extensions EME API. This vulnerability can be triggered using a malformed video file due to incorrect error handling...

Use-after-free in NSS during SSL connections in low memory — Mozilla

Mozilla developer Eric Rescorla reported that a failed allocation during DHE and ECDHE handshakes would lead to a use-after-free vulnerability...

Cross-site reading attack through data and view-source URIs — Mozilla

Security researcher Tsubasa Iinuma reported a mechanism to violate same-origin policy to content using data: and view-source: URIs to confuse protections and bypass restrictions. This resulted in the ability to read data from cross-site URLs and local files...

Vulnerabilities found through code inspection — Mozilla

Security researcher Ronald Crane reported eight vulnerabilities affecting released code that were found through code inspection. These included several potential memory safety issues resulting from the use of snprintf, one use of unowned memory, one use of a string without overflow checks, and fi...

Double-free when using non-default memory allocators with a zero-length XHR — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team and Mozilla security developer Gary Kwong used the Address Sanitizer tool to discover a double-free error when sending a zero-length XmlHttpRequest XHR. This was due to errors in memory allocation when using different...

Document URI misrepresentation and masquerading — Mozilla

Mozilla security researcher mozbugra4 reported that through an interaction of frames and browser history it was possible to make the browser believe attacker-supplied content came from the location of a previous page in browser history. This allows for cross-site scripting XSS attacks by loading...

Bypass of tab-modal dialog origin disclosure — Mozilla

Security researcher shutdown reported a method for removing the origin indication on tab-modal dialog boxes in combination with browser navigation. This could allow an attacker's dialog to overlay a page and show another site's content. This can be used for phishing by allowing users to enter dat...

Cross-site scripting (XSS) using timed history navigations — Mozilla

Security researcher Mariusz Mlynski reported a method to use browser navigations through history to load an arbitrary website with that page's baseURI property pointing to another site instead of the seemingly loaded one. The user will continue to see the incorrect site in the addressbar of the...

Fixes for Location object issues — Mozilla

Mozilla has fixed a number of issues related to the Location object in order to enhance overall security. Details for each of the current fixed issues are below...

Spoofing and script injection through location.hash — Mozilla

Security researcher Mariusz Mlynski reported an issue with spoofing of the location property. In this issue, writes to location.hash can be used in concert with scripted history navigation to cause a specific website to be loaded into the history object. The baseURI can then be changed to this...

Spoofing issue with location — Mozilla

Security researcher Mariusz Mlynski reported an issue with spoofing of the location property. In this issue, calls to history.forward and history.back are used to navigate to a site while displaying the previous site in the addressbar but changing the baseURI to the newer site. This can be used f...

<iframe> element exposed across domains via name attribute — Mozilla

Vitaly Nevgen reported that an attacker could replace a sub-frame in another domain's document by using the name attribute of the sub-frame as a form submission target. This can potentially allow for phishing attacks against users and violates the HTML5 frame navigation policy...