Sandbox restrictions not applied to nested object elements — Mozilla

Mozilla security developer Daniel Veditz discovered that restrictions are not applied to an element contained within a sandboxed iframe. This could allow content hosted within a sandboxed iframe to use element to bypass the sandbox restrictions that should be applied...

Use-after-free in Animation Manager during stylesheet cloning — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team used the Address Sanitizer tool to discover a use-after-free problem in the Animation Manager during the cloning of stylesheets. This can lead to a potentially exploitable crash...

PreserveWrapper has inconsistent behavior — Mozilla

Mozilla developer Boris Zbarsky found that when PreserveWrapper was used in cases where a wrapper is not set, the preserved-wrapper flag on the wrapper cache is cleared. This could potentially lead to an exploitable crash...

Arbitrary code execution within Profiler — Mozilla

Security researcher Mariusz Mlynski reported that when a user examines the profiler output on a malicious website containing specially crafted code, it is possible for arbitrary code execution to occur. This occurs because the profiler user interface runs in a special iframe that parses data from...

Out-of-bounds array read in CERT_DecodeCertPackage — Mozilla

Mozilla community member Ambroz Bizjak reported an out-of-bounds array read in the CERTDecodeCertPackage function of the Network Security Services NSS library when decoding a certificate. When this occurs, it will lead to memory corruption and a non-exploitable crash...

Buffer Overflow in Canvas — Mozilla

Security researcher miaubiz used the Address Sanitizer tool to discover a buffer overflow in Canvas when specific bad height and width values were given through HTML. This could lead to a potentially exploitable crash...

Script entered into Developer Toolbar runs with chrome privileges — Mozilla

Security researcher Masato Kinugawa reported that when script is entered into the Developer Toolbar, it runs in a chrome privileged context. This allows for arbitrary code execution or cross-site scripting XSS if a user can be convinced to paste malicious code into the Developer Toolbar...

XMLHttpRequest inherits incorrect principal within sandbox — Mozilla

Mozilla developer Gabor Krizsanits discovered that XMLHttpRequest objects created within sandboxes have the system principal instead of the sandbox principal. This can lead to cross-site request forgery CSRF or information theft via an add-on running untrusted code in a sandbox...

Some DOMWindowUtils methods bypass security checks — Mozilla

Mozilla developer Johnny Stenback discovered that several methods of a feature used for testing DOMWindowUtils are not protected by existing security checks, allowing these methods to be called through script by web pages. This was addressed by adding the existing security checks to these methods...

Same-compartment Security Wrappers can be bypassed — Mozilla

Mozilla developer Bobby Holley found that same-compartment security wrappers SCSW can be bypassed by passing them to another compartment. Cross-compartment wrappers often do not go through SCSW, but have a filtering policy built into them. When an object is wrapped cross-compartment, the SCSW is...

Privilege escalation through Mozilla Updater and Windows Updater Service — Mozilla

Security researcher James Forshaw of Context Information Security found two issues with the Mozilla updater and the Mozilla updater service introduced in Firefox 12 for Windows. The first issue allows Mozilla's updater to load a local DLL file in a privileged context. The updater can be called by...

Potential XSS against sites using Shift-JIS — Mozilla

Yosuke Hasegawa reported that the Mozilla browser engine mishandled invalid sequences in the Shift-JIS encoding. When encountering an invalid pair Mozilla would turn the entire two-byte sequence into a single unknown character rather than an unknown character followed by a valid single-byte...

loadSubScript unwraps XPCNativeWrapper scope parameter — Mozilla

David Rees reported that the JSSubScriptLoader a feature used by some add-ons was "unwrapping" XPCNativeWrappers when they were used as the scope parameter to loadSubScript. Without the protection of the wrappers the add-on could be vulnerable to privilege escalation attacks from malicious web...

Dangling pointer vulnerability in nsTreeSelection — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative that there was a remaining dangling pointer issue leftover from the fix to CVE-2010-2753. Under certain circumstances one of the pointers held by a XUL tree selection could be freed and then later reused, potentially...

Cross-domain data theft using CSS — Mozilla

Google security researcher Chris Evans reported that data can be read across domains by injecting bogus CSS selectors into a target site and then retrieving the data using JavaScript APIs. If an attacker can inject opening and closing portions of a CSS selector into points A and B of a target pag...

nsCSSValue::Array index integer overflow — Mozilla

Security researcher J23 reported via TippingPoint's Zero Day Initiative that an array class used to store CSS values contained an integer overflow vulnerability. The 16 bit integer value used in allocating the size of the array could overflow, resulting in too small a memory buffer being created...

Update NSS to support TLS renegotiation indication — Mozilla

Mozilla developers added support in the Network Security Services module for preventing a type of man-in-the-middle attack against TLS using forced renegotiation...

Heap buffer overflow in GIF color map parser — Mozilla

Security research firm iDefense reported that researcher regenrecht discovered a heap-based buffer overflow in Mozilla's GIF image parser. This vulnerability could potentially be used by an attacker to crash a victim's browser and run arbitrary code on their computer...

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...

Security Vulnerabilities fixed in Firefox ESR 153.1 — Mozilla

Internally found bugs present in Firefox ESR 140.13, Firefox ESR 153.0 and Firefox 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. Internally found bugs present in...

Security Vulnerabilities fixed in Thunderbird 128.1 — Mozilla

Select options could obscure the fullscreen notification dialog. This could be used by a malicious site to perform a spoofing attack. Insufficient checks when processing graphics shared memory could have led to memory corruption. This could be leveraged by an attacker to perform a sandbox escape....

Security Vulnerabilities fixed in Firefox ESR 78.4 — Mozilla

A use-after-free bug in the usersctp library was reported upstream. We assume this could have led to memory corruption and a potentially exploitable crash. Mozilla developers and community members Jason Kratzer, Simon Giesecke, Philipp, and Christian Holler reported memory safety bugs present in...

Security vulnerabilities fixed in Thunderbird 68 — Mozilla

When an inner window is reused, it does not consider the use of document.domain for cross-origin protections. If pages on different subdomains ever cooperatively use document.domain, then either page can abuse this to inject script into arbitrary pages on the other subdomain, even those that did...

Security vulnerabilities fixed in Thunderbird 60.8 — Mozilla

As part of his winning Pwn2Own entry, Niklas Baumstark demonstrated a sandbox escape by installing a malicious language pack and then opening a browser feature that used the compromised translation. When an inner window is reused, it does not consider the use of document.domain for cross-origin...

Miscellaneous memory safety hazards (rv:45.0 / rv:38.7) — Mozilla

Mozilla developers 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 exploited to run...

Integer overflow allocating extremely large textures — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team used the Address Sanitizer tool to discover an integer overflow when when allocating textures of extremely larges sizes during graphics operations. This results in a potentially exploitable crash when triggered...

Vulnerabilities found through code inspection — Mozilla

Security researcher Ronald Crane reported three vulnerabilities affecting released code that were found through code inspection. These included one use of unowned memory, one use of a deleted object, and one memory safety bug. These do not all have clear mechanisms to be exploited through web...

Memory corruption crashes in Off Main Thread Compositing — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team used the Address Sanitizer tool to discover two memory corruption crashes during 2D graphics rendering due to problems in Off Main Thread Compositing. These crashes are potentially exploitable...

XMLHttpRequest crashes with some input streams — Mozilla

Security researcher Joe Vennix from Rapid7 reported that passing a JavaScript object to XMLHttpRequest that mimics an input stream will a crash. This crash is not exploitable and can only be used for denial of service attacks...

Buffer overflow when using non-XBL object as XBL — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team used the Address Sanitizer tool to discover a buffer overflow when a script uses a non-XBL object as an XBL object because the XBL status of the object is not properly validated. The resulting memory corruption is...

Out of bounds read during WAV file decoding — Mozilla

Security researcher Atte Kettunen from OUSPG reported an out of bounds read during the decoding of WAV format audio files for playback. This could allow web content access to heap data as well as causing a crash...

Miscellaneous memory safety hazards (rv:28.0 / rv:24.4) — 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...

Miscellaneous memory safety hazards (rv:26.0 / rv:24.2) — 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...

Miscellaneous Network Security Services (NSS) vulnerabilities — Mozilla

Mozilla has updated the version of Network Security Services NSS library used in Mozilla projects to NSS 3.15.3 with the exception of ESR17-based releases, which have been updated to NSS 3.14.5. This addresses several moderate to critical rated networking security issues...

File input control has access to full path — Mozilla

Mozilla security researcher mozbugra4 reported a mechanism to exploit the control when set to the file type in order to get the full path. This can lead to information leakage and could be combined with other exploits to target attacks on the local file system...

Bypass of SOW protections allows cloning of protected nodes — Mozilla

Security researcher Cody Crews reported a mechanism to use the cloneNode method to bypass System Only Wrappers SOW and clone a protected node. This allows violation of the browser's same origin policy and could also lead to privilege escalation and the execution of arbitrary code...

URL spoofing in addressbar during page loads — Mozilla

Security researcher Masato Kinugawa found a flaw in which the displayed URL values within the addressbar can be spoofed by a page during loading. This allows for phishing attacks where a malicious page can spoof the identify of another site...

Use-after-free in the IME State Manager — Mozilla

Security researcher miaubiz used the Address Sanitizer tool to discover a use-after-free in the IME State Manager code. This could lead to a potentially exploitable crash...

SJOW creates scope chains ending in outer object — Mozilla

Mozilla developer Blake Kaplan reported that the wrapper class XPCSafeJSObjectWrapper SJOW, a security wrapper that allows content-defined objects to be safely accessed by privileged code, creates scope chains ending in outer objects. Users of SJOWs which expect the scope chain to end on an inner...

Remote code execution with use-after-free in nsTreeSelection — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative that a select event handler for XUL tree items could be called after the tree item was deleted. This results in the execution of previously freed memory which an attacker could use to crash a victim's browser and run...

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...

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...

Localstore.rdf XML injection through XULDocument.persist() — Mozilla

XULDocument.persist did not validate the attribute name, allowing an attacker to inject XML into localstore.rdf that would be read and acted upon at startup. This could include JavaScript commands that would be run with the permissions of the browser...

Security Vulnerabilities fixed in Firefox ESR 78.10.1 — Mozilla

The Mozilla Maintenance Service granted SERVICESTART access to BUILTIN|Users which, in a domain network, grants normal remote users access to start or stop the service. This could be used to prevent the browser update service from operating if an attacker spammed the 'Stop' command; but also...

Security Vulnerabilities fixed in Firefox ESR 78.3 — Mozilla

By exploiting an Open Redirect vulnerability on a website, an attacker could have spoofed the site displayed in the download file dialog to show the original site the one suffering from the open redirect rather than the site the file was actually downloaded from. Firefox sometimes ran the onload...

Security vulnerabilities fixed in - Thunderbird 68.1 — Mozilla

Encrypted S/MIME parts in a crafted multipart/alternative message can leak plaintext when included in a a HTML reply/forward. A use-after-free vulnerability can occur while manipulating video elements if the body is freed while still in use. This results in a potentially exploitable crash. Some...

Security vulnerabilities fixed in Thunderbird 60.6 — Mozilla

A use-after-free vulnerability can occur when a raw pointer to a DOM element on a page is obtained using JavaScript and the element is then removed while still in use. This results in a potentially exploitable crash. The type inference system allows the compilation of functions that can cause typ...

Spoofing attack through text injection into internal error pages — Mozilla

Security researcher musicDespiteEverything reported that some of the special about: URLs used by Firefox to display system information or error messages can incorporate text passed as parameters. These could be used in spoofing attacks...

CSP not applied to pages sent with multipart/x-mixed-replace — Mozilla

Security researcher Muneaki Nishimura nishimunea of Recruit Technologies Co., Ltd. reported that Content Security Policy CSP is not applied correctly to web content sent with the multipart/x-mixed-replace MIME type. This allows for script to run in instances where CSP should block it, leading to ...

Trailing whitespace in IP address hostnames can bypass same-origin policy — Mozilla

Security researcher Michał Bentkowski reported that adding white-space characters to hostnames that are IP addresses can bypass same-origin policy. This flaw was caused by trailing whitespaces being evaluated differently when parsing IP addresses instead of alphanumeric hostnames. This could lead...