CVE-2015-2731 Use after free in n/a

What is CVE-2015-2731?

CVE-2015-2731 is a critical use after free vulnerability in Mozilla Firefox, published on 6 Jul 2015. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Use-after-free vulnerability in the CSPService::ShouldLoad function in the microtask implementation in Mozilla Firefox before 39.0, Firefox ESR 38.x before 38.1, and Thunderbird before 38.1 allows remote attackers to execute arbitrary code by leveraging client-side JavaScript that triggers removal of a DOM object on the basis of a Content Policy.

Which versions are affected by CVE-2015-2731?

It affects 4 products.

Products include Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Oracle Solaris.

How do I fix CVE-2015-2731?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2015-2731 being exploited?

There is no known exploitation of CVE-2015-2731 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-x5r4-6m79-9q47, UBUNTU-CVE-2015-2731.