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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 exploited to run arbitrary code.

Security researcher Abhishek Arya (Inferno) of the Google Chrome Security Team used the Address Sanitizer tool to discover a series of use-after-free problems rated critical as security issues in shipped software.Some of these issues are potentially exploitable, allowing for remote code execution. We would also like to thank Abhishek for reporting additional use-after-free and buffer overflow fla ...

Security researcher Mariusz Mlynski reported that it is possible to compile a user-defined function in the XBL scope of a specific element and then trigger an event within this scope to run code. In some circumstances, when this code is run, it can access content protected by SystemOnly Wrappers (SOW) and chrome-privileged pages. This could potentially lead to arbitrary code execution. Additional ...

Security researcher Mariusz Mlynski reported that when auser 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 thatparses data from the profiler to render the UI, leaving it susceptible to manipulation.

Security researcher Nils reported that specially crafted web content using the onreadystatechange event and reloading of pages could sometimes cause a crash when unmapped memory is executed. This crash is potentially exploitable.

Security researcher Johnathan Kuskos reported that Firefox is sending data in the body of XMLHttpRequest (XHR) HEAD requests, which goes against the XHR specification. This can potentially be used for Cross-Site Request Forgery (CSRF) attacks against sites which do not distinguish between HEAD and POST requests.

Security researcher Paul Stone of <ahref="http://www.contextis.co.uk/">Context Information Security discovered that timing differences in the processing of SVG format images with filters could allow for pixel values to be read. This could potentially allow for text values to be read across domains, leading to information disclosure.

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.

Mozilla community member Bob Owen reported that &lt;iframe sandbox&gt; restrictions are not applied to a frame element contained within a sandboxed iframe. As a result,content hosted within a sandboxed iframe could use a frame element to bypass the restrictions that should be applied.

Bugzilla developer Fr&eacute;d&eacute;ric Buclin reported that the X-Frame-Options header is ignored when server push is used in multi-part responses. This can lead to potential clickjacking on sites that use X-Frame-Options as a protection.

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