CVE-2020-26975 Security feature bypass in Firefox
A malicious app could inject arbitrary headers via Intents in Firefox for Android, enabling session fixation or ambient authority abuse.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-26975?
CVE-2020-26975 is a medium-severity vulnerability in Mozilla Firefox Mobile, published on 7 Jan 2021. 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 a malicious application installed on the user's device broadcast an Intent to Firefox for Android, arbitrary headers could have been specified, leading to attacks such as abusing ambient authority or session fixation. This was resolved by only allowing certain safe-listed headers. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 84.
Which versions are affected by CVE-2020-26975?
It affects 1 product.
Products include Mozilla Firefox Mobile.
How do I fix CVE-2020-26975?
Upgrade to a fixed version.
Is CVE-2020-26975 being exploited?
There is no known exploitation of CVE-2020-26975 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox Mobile
Sources
Also known as GHSA-cmfr-9hrr-hpg4.