CVE-2022-26387 Race condition in Firefox
Attackers can modify add-on files during installation prompts to bypass signature verification, potentially executing malicious code in Firefox or Thunderbird.
- 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-2022-26387?
CVE-2022-26387 is a high-severity vulnerability in Mozilla Firefox, published on 22 Dec 2022. 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 installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified and Firefox would not have noticed. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.
Weakness: CWE-367
Which versions are affected by CVE-2022-26387?
It affects 3 products.
Products include Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird.
How do I fix CVE-2022-26387?
Upgrade to a fixed version.
Is CVE-2022-26387 being exploited?
There is no known exploitation of CVE-2022-26387 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as DEBIAN-CVE-2022-26387, GHSA-w44g-v7w6-xpcv, UBUNTU-CVE-2022-26387.