What’s Vulnerable › Vulnerabilities

CVE-2022-42905

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-07 · updated 2026-06-17
• Weakness: CWE-125

Description

In wolfSSL before 5.5.2, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS 1.3 client or network attacker can trigger a buffer over-read on the heap of 5 bytes. (WOLFSSL_CALLBACKS is only intended for debugging.)

Affected products

• wolfSSL: before 5.5.2 — fixed in 5.5.2

How to fix

Upgrade to a fixed version: wolfSSL 5.5.2. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/170610/wolfSSL-WOLFSSL_CALLBACKS-Heap-Buffer-Over-Read.html
• http://seclists.org/fulldisclosure/2023/Jan/11
• https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/
• https://github.com/wolfSSL/wolfssl/releases
• https://github.com/wolfSSL/wolfssl/releases/tag/v5.5.2-stable
• https://www.wolfssl.com/docs/security-vulnerabilities/
• http://packetstormsecurity.com/files/170610/wolfSSL-WOLFSSL_CALLBACKS-Heap-Buffer-Over-Read.html
• http://seclists.org/fulldisclosure/2023/Jan/11
• https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/
• https://github.com/wolfSSL/wolfssl/releases
• https://github.com/wolfSSL/wolfssl/releases/tag/v5.5.2-stable
• https://www.wolfssl.com/docs/security-vulnerabilities/

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