CVE-2023-35784 Use after free in n/a
A double free or use-after-free in LibreSSL's SSL_clear function allows attackers to execute arbitrary code or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-35784?
CVE-2023-35784 is a critical use after free vulnerability in Openbsd Openbsd, published on 16 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A double free or use after free could occur after SSL_clear in OpenBSD 7.2 before errata 026 and 7.3 before errata 004, and in LibreSSL before 3.6.3 and 3.7.x before 3.7.3. NOTE: OpenSSL is not affected.
Which versions are affected by CVE-2023-35784?
It affects 2 products.
Products include Openbsd Libressl, Openbsd Openbsd.
How do I fix CVE-2023-35784?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2023-35784 being exploited?
There is no known exploitation of CVE-2023-35784 in the wild and no public exploit code.
Other vulnerabilities in Openbsd Openbsd
Sources
Also known as BELL-CVE-2023-35784, GHSA-w423-44w8-64mh.