CVE-2020-6795 Null dereference in Thunderbird
A null pointer dereference in Thunderbird's S/MIME processing causes a crash when handling multiple signatures, resulting in denial of service.
- 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-2020-6795?
CVE-2020-6795 is a medium-severity vulnerability in Mozilla Thunderbird, published on 2 Mar 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 processing a message that contains multiple S/MIME signatures, a bug in the MIME processing code caused a null pointer dereference, leading to an unexploitable crash. This vulnerability affects Thunderbird < 68.5.
Weakness: CWE-476
Which versions are affected by CVE-2020-6795?
It affects 1 product.
Products include Mozilla Thunderbird.
How do I fix CVE-2020-6795?
Upgrade to a fixed version.
Is CVE-2020-6795 being exploited?
There is no known exploitation of CVE-2020-6795 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Thunderbird
Sources
Also known as DEBIAN-CVE-2020-6795, GHSA-4whv-ch98-q6fp, UBUNTU-CVE-2020-6795.