CVE-2022-40958 Other in Firefox
Attackers can overwrite secure cookies via special characters in shared subdomains, enabling session fixation and account takeover in Firefox and 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-2022-40958?
CVE-2022-40958 is a medium-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
By injecting a cookie with certain special characters, an attacker on a shared subdomain which is not a secure context could set and thus overwrite cookies from a secure context, leading to session fixation and other attacks. This vulnerability affects Firefox ESR < 102.3, Thunderbird < 102.3, and Firefox < 105.
Weakness: CWE-74
Which versions are affected by CVE-2022-40958?
It affects 3 products.
Products include Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird.
How do I fix CVE-2022-40958?
Upgrade to a fixed version.
Is CVE-2022-40958 being exploited?
There is no known exploitation of CVE-2022-40958 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as DEBIAN-CVE-2022-40958, GHSA-7mxj-29p2-6g84, UBUNTU-CVE-2022-40958.