Vulnerability in Wolfssl
CVE-2022-38152
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.
EPSS: 0.021 (80.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Wolfssl
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Release Notes)
- cve@mitre.org (Vendor Advisory)
- cve@mitre.org (Exploit, Patch, Third Party Advisory)
- cve@mitre.org (Not Applicable)
- cve@mitre.org (mailing-list, Exploit, Mailing List, Third Party Advisory)
- cve@mitre.org (Exploit, Third Party Advisory)
- cve@mitre.org (Third Party Advisory)
Frequently asked questions
- What is CVE-2022-38152?
- CVE-2022-38152 is a high-severity vulnerability in Wolfssl, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2022-08-31.
- How severe is CVE-2022-38152?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-38152 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.