CVE-2022-38153

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.

• CWE-770

• http://packetstormsecurity.com/files/170605/wolfSSL-5.3.0-Denial-Of-Service.htmlExploit, Third Party Advisory
• http://seclists.org/fulldisclosure/2023/Jan/8Exploit, Mailing List, Third Party Advisory
• https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/Third Party Advisory
• https://github.com/trailofbits/tlspuffinNot Applicable
• https://github.com/wolfSSL/wolfssl/pull/5476Exploit, Patch, Third Party Advisory
• https://github.com/wolfSSL/wolfssl/releasesRelease Notes
• https://www.wolfssl.com/docs/security-vulnerabilities/Vendor Advisory
• http://packetstormsecurity.com/files/170605/wolfSSL-5.3.0-Denial-Of-Service.htmlExploit, Third Party Advisory
• http://seclists.org/fulldisclosure/2023/Jan/8Exploit, Mailing List, Third Party Advisory
• https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/Third Party Advisory
• https://github.com/trailofbits/tlspuffinNot Applicable
• https://github.com/wolfSSL/wolfssl/pull/5476Exploit, Patch, Third Party Advisory
• https://github.com/wolfSSL/wolfssl/releasesRelease Notes
• https://www.wolfssl.com/docs/security-vulnerabilities/Vendor Advisory

Published

Aug 31, 2022

Last Modified

Jun 17, 2026

Status

Modified