CVE-2020-12415 Security feature bypass in Firefox

What is CVE-2020-12415?

CVE-2020-12415 is a medium-severity vulnerability in Mozilla Firefox, published on 9 Jul 2020. 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

When "%2F" was present in a manifest URL, Firefox'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. This vulnerability affects Firefox < 78.

Weakness: CWE-276

Which versions are affected by CVE-2020-12415?

It affects 2 products.

Products include Mozilla Firefox, Opensuse Leap.

How do I fix CVE-2020-12415?

Upgrade to a fixed version.

Is CVE-2020-12415 being exploited?

There is no known exploitation of CVE-2020-12415 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-xp2p-6mv7-gcrx, UBUNTU-CVE-2020-12415.