Vulnerability Description
An issue was discovered in wolfSSL before 5.5.0. When a TLS 1.3 client connects to a wolfSSL server and SSL_clear is called on its session, the server crashes with a segmentation fault. This occurs in the second session, which is created through TLS session resumption and reuses the initial struct WOLFSSL. If the server reuses the previous session structure (struct WOLFSSL) by calling wolfSSL_clear(WOLFSSL* ssl) on it, the next received Client Hello (that resumes the previous session) crashes the server. Note that this bug is only triggered when resuming sessions using TLS session resumption. Only servers that use wolfSSL_clear instead of the recommended SSL_free; SSL_new sequence are affected. Furthermore, wolfSSL_clear is part of wolfSSL's compatibility layer and is not enabled by default. It is not part of wolfSSL's native API.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wolfssl | Wolfssl | < 5.5.0 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/170604/wolfSSL-Session-Resumption-Denial-OfExploitThird Party Advisory
- http://seclists.org/fulldisclosure/2023/Jan/7ExploitMailing ListThird Party Advisory
- https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzinThird Party Advisory
- https://github.com/tlspuffin/tlspuffinNot Applicable
- https://github.com/wolfSSL/wolfssl/pull/5468ExploitPatchThird Party Advisory
- https://github.com/wolfSSL/wolfssl/releasesRelease Notes
- https://www.wolfssl.com/docs/security-vulnerabilities/Vendor Advisory
- http://packetstormsecurity.com/files/170604/wolfSSL-Session-Resumption-Denial-OfExploitThird Party Advisory
- http://seclists.org/fulldisclosure/2023/Jan/7ExploitMailing ListThird Party Advisory
- https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzinThird Party Advisory
- https://github.com/tlspuffin/tlspuffinNot Applicable
- https://github.com/wolfSSL/wolfssl/pull/5468ExploitPatchThird Party Advisory
- https://github.com/wolfSSL/wolfssl/releasesRelease Notes
- https://www.wolfssl.com/docs/security-vulnerabilities/Vendor Advisory
FAQ
What is CVE-2022-38152?
CVE-2022-38152 is a vulnerability with a CVSS score of 7.5 (HIGH). An issue was discovered in wolfSSL before 5.5.0. When a TLS 1.3 client connects to a wolfSSL server and SSL_clear is called on its session, the server crashes with a segmentation fault. This occurs in...
How severe is CVE-2022-38152?
CVE-2022-38152 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-38152?
Check the references section above for vendor advisories and patch information. Affected products include: Wolfssl Wolfssl.