CVE-2020-15655 Information disclosure in Firefox
Attackers can bypass CORS checks via redirected HTTP requests in Firefox and Thunderbird, leading to cross-origin information disclosure.
- 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-2020-15655?
CVE-2020-15655 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 10 Aug 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
A redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of cross-origin information. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
Which versions are affected by CVE-2020-15655?
It affects 5 products.
Products include Canonical Ubuntu Linux, Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Opensuse Leap.
How do I fix CVE-2020-15655?
Upgrade to a fixed version.
Is CVE-2020-15655 being exploited?
There is no known exploitation of CVE-2020-15655 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as GHSA-xjqq-782m-q873, UBUNTU-CVE-2020-15655.