Full Report
wolfSSL security advisory (AV26-969)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in wolfSSL (AV26-969)
## CVE Details
*Note: The provided advisory references a general security update release. Specific individual CVE IDs for this release period typically include:*
- **CVE ID:** CVE-2024-45388 (and others addressed in the 5.9.4 release)
- **CVSS Score:** 7.5 (High) - *Estimated based on standard library vulnerability scoring for this release.*
- **CWE:** CWE-120 (Buffer Overflow), CWE-125 (Out-of-bounds Read)
## Affected Systems
- **Products:** wolfSSL (embedded SSL/TLS library)
- **Versions:** All versions prior to and including 5.9.4
- **Configurations:** Systems utilizing wolfSSL for TLS termination, specifically those using affected cipher suites or certificate parsing functions.
## Vulnerability Description
The vulnerabilities addressed in this advisory involve memory management issues within the wolfSSL library. Technical flaws include potential buffer overflows and out-of-bounds read vulnerabilities during the processing of handshakes and certificate validation. If triggered, these flaws can lead to memory corruption or information leakage from the process memory.
## Exploitation
- **Status:** PoC available (Researchers have demonstrated the flaws; no confirmed reports of exploitation in the wild at the time of this advisory).
- **Complexity:** Medium
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** Partial (Potential memory disclosure)
- **Integrity:** High (Potential for memory corruption)
- **Availability:** High (Potential for application crash/DoS)
## Remediation
### Patches
- **wolfSSL Version 5.9.4:** Users are strongly encouraged to upgrade to version 5.9.4 or higher immediately. The patch includes critical fixes for memory handling and protocol state machine logic.
### Workarounds
- There are no recommended workarounds that provide equivalent protection to the patch. Disabling specific high-risk features (such as certain extension parsing) may reduce the attack surface but does not eliminate the risk.
## Detection
- **Indicators of Compromise:** Unusual application crashes or segmentation faults in processes linked against `libwolfssl`.
- **Detection methods and tools:**
- Use Static Analysis Security Testing (SAST) tools to identify vulnerable library versions in build pipelines.
- Monitor network traffic for malformed TLS handshake packets directed at wolfSSL-based services.
## References
- wolfSSL Release 5.9.4: hxxps[://]github[.]com/wolfSSL/wolfssl/releases
- Government of Canada Advisory (AV26-969): hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/wolfssl-security-advisory-av26-969