CVE-2022-38152
First published: Wed Aug 31 2022(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| WolfSSL wolfssl | <5.5.0 |
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Reference Links
- http://packetstormsecurity.com/files/170604/wolfSSL-Session-Resumption-Denial-Of-Service.html
- http://seclists.org/fulldisclosure/2023/Jan/7
- https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/
- https://github.com/tlspuffin/tlspuffin
- https://github.com/wolfSSL/wolfssl/pull/5468
- https://github.com/wolfSSL/wolfssl/releases
- https://www.wolfssl.com/docs/security-vulnerabilities/
Frequently Asked Questions
What is CVE-2022-38152?
CVE-2022-38152 is a vulnerability discovered in wolfSSL before version 5.5.0 that can cause a server to crash when a TLS 1.3 client connects and SSL_clear is called on its session.
How severe is CVE-2022-38152?
The severity of CVE-2022-38152 is rated as high with a CVSS score of 7.5.
What software is affected by CVE-2022-38152?
The affected software is Wolfssl Wolfssl version up to exclusive 5.5.0.
What is the CWE ID for CVE-2022-38152?
The CWE ID for CVE-2022-38152 is 754.
How can I fix CVE-2022-38152?
To fix CVE-2022-38152, update wolfSSL to version 5.5.0 or later.
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