CVE-2020-16094 Denial of service in n/a
A malicious IMAP server can cause Claws Mail to crash via stack exhaustion during folder tree rebuilds, requiring users to upgrade the client.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-16094?
CVE-2020-16094 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 28 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In imap_scan_tree_recursive in Claws Mail through 3.17.6, a malicious IMAP server can trigger stack consumption because of unlimited recursion into subdirectories during a rebuild of the folder tree.
Weakness: CWE-674
Which versions are affected by CVE-2020-16094?
It affects 2 products.
Products include Claws-Mail Claws-Mail, Fedoraproject Fedora.
How do I fix CVE-2020-16094?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-16094 being exploited?
There is no known exploitation of CVE-2020-16094 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as CLEANSTART-2023-AQ06363, DEBIAN-CVE-2020-16094, GHSA-8f6j-9hh3-9c9x, MGASA-2020-0391, UBUNTU-CVE-2020-16094.