CVE-2021-29969 Other in Thunderbird
Attackers can inject IMAP responses before STARTTLS completion to trick Thunderbird into displaying incorrect folder information.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-29969?
CVE-2021-29969 is a medium-severity vulnerability in Mozilla Thunderbird, published on 5 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird < 78.12.
Weakness: CWE-552
Which versions are affected by CVE-2021-29969?
It affects 1 product.
Products include Mozilla Thunderbird.
How do I fix CVE-2021-29969?
Upgrade to a fixed version.
Is CVE-2021-29969 being exploited?
There is no known exploitation of CVE-2021-29969 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Thunderbird
Sources
Also known as DEBIAN-CVE-2021-29969, GHSA-ggp3-c9px-5c4p, UBUNTU-CVE-2021-29969.