CVE-2022-38153

Summary

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.

Impact & exploitability

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://github.com/wolfSSL/wolfssl/pull/5476 ↗

Additional information

• NVD record
• https://github.com/wolfSSL/wolfssl/pull/5476Patch
• https://www.wolfssl.com/docs/security-vulnerabilities/Advisory
• https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/Advisory
• https://github.com/trailofbits/tlspuffin
• https://github.com/wolfSSL/wolfssl/releases
• http://packetstormsecurity.com/files/170605/wolfSSL-5.3.0-Denial-Of-Service.htmlAdvisory
• http://seclists.org/fulldisclosure/2023/Jan/8Advisory