CVE-2022-38153 Use after free in n/a
A use-after-free vulnerability in wolfSSL allows attackers to crash TLS clients via large session tickets when session caching is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-38153?
CVE-2022-38153 is a medium-severity use after free vulnerability in Wolfssl Wolfssl, published on 31 Aug 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in wolfSSL before 5.5.0 (when --enable-session-ticket is used); however, only version 5.3.0 is exploitable. Man-in-the-middle attackers or a malicious server can crash TLS 1.2 clients during a handshake. If an attacker injects a large ticket (more than 256 bytes) into a NewSessionTicket message in a TLS 1.2 handshake, and the client has a non-empty session cache, the session cache frees a pointer that points to unallocated memory, causing the client to crash with a "free(): invalid pointer" message. NOTE: It is likely that this is also exploitable during TLS 1.3 handshakes between a client and a malicious server. With TLS 1.3, it is not possible to exploit this as a man-in-the-middle.
Weakness: CWE-770
Which versions are affected by CVE-2022-38153?
It affects 1 product.
Products include Wolfssl Wolfssl.
How do I fix CVE-2022-38153?
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-2022-38153 being exploited?
There is no known exploitation of CVE-2022-38153 in the wild and no public exploit code.
Other vulnerabilities in Wolfssl Wolfssl
Sources
Also known as DEBIAN-CVE-2022-38153, GHSA-9cp4-7v5m-jx89, UBUNTU-CVE-2022-38153.