Unrated severityNVD Advisory· Published Sep 29, 2022· Updated May 20, 2025
CVE-2022-39173
CVE-2022-39173
Description
In wolfSSL before 5.5.1, malicious clients can cause a buffer overflow during a TLS 1.3 handshake. This occurs when an attacker supposedly resumes a previous TLS session. During the resumption Client Hello a Hello Retry Request must be triggered. Both Client Hellos are required to contain a list of duplicate cipher suites to trigger the buffer overflow. In total, two Client Hellos have to be sent: one in the resumed session, and a second one as a response to a Hello Retry Request message.
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Affected products
2Patches
Vulnerability mechanics
References
5- seclists.org/fulldisclosure/2022/Oct/24mitremailing-list
- packetstormsecurity.com/files/169600/wolfSSL-Buffer-Overflow.htmlmitre
- blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/mitre
- github.com/wolfSSL/wolfssl/releasesmitre
- www.wolfssl.com/docs/security-vulnerabilities/mitre
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