Full Report
OpenSSL security advisory (AV26-846)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in OpenSSL Library
## CVE Details
*Note: The provided advisory (AV26-846) serves as a notification of multiple vulnerabilities across OpenSSL branches. Specific CVE identifiers for the August 2026 release cycle would typically be detailed in the accompanying OpenSSL Library link.*
- **CVE ID:** [Pending/Multiple - Refer to OpenSSL Advisory]
- **CVSS Score:** Variable (Historically ranging from Low to High)
- **CWE:** Often includes CWE-400 (Resource Exhaustion) or CWE-119 (Memory Corruption)
## Affected Systems
- **Products:** OpenSSL Library
- **Versions:**
- OpenSSL 1.0.2 (Prior to 1.0.2zr)
- OpenSSL 1.1.1 (Prior to 1.1.1zi)
- OpenSSL 3.0 (Prior to 3.0.22)
- OpenSSL 3.4 (Prior to 3.4.7)
- OpenSSL 3.5 (Prior to 3.5.8)
- OpenSSL 3.6 (Prior to 3.6.4)
- OpenSSL 4.0 (Prior to 4.0.2)
- **Configurations:** Systems utilizing OpenSSL for TLS/SSL termination, certificate management, or cryptographic operations.
## Vulnerability Description
While the specific technical flaws vary by version, these updates typically address memory management issues, potential side-channel attacks, or vulnerabilities that could lead to a Denial of Service (DoS) or unauthorized information disclosure during the TLS handshake or certificate validation process.
## Exploitation
- **Status:** Not currently reported as exploited in the wild (refer to latest vendor updates).
- **Complexity:** Low to Medium
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** Potential (depending on specific CVE)
- **Integrity:** Potential (depending on specific CVE)
- **Availability:** High (Denial of Service is a frequent impact for OpenSSL library flaws)
## Remediation
### Patches
Users and administrators should upgrade to the following versions as applicable to their current branch:
- **OpenSSL 1.0.2zr** (Premium support users only)
- **OpenSSL 1.1.1zi** (Premium support users only)
- **OpenSSL 3.0.22**
- **OpenSSL 3.4.7**
- **OpenSSL 3.5.8**
- **OpenSSL 3.6.4**
- **OpenSSL 4.0.2**
### Workarounds
- Ensure robust firewall rules limit access to vulnerable services to trusted IPs.
- For DoS-related flaws, consider implementing rate-limiting at the load balancer level.
## Detection
- **Indicators of Compromise:** Unusual spikes in CPU/Memory usage on services utilizing OpenSSL; crashes in applications linked to `libcrypto` or `libssl`.
- **Detection methods and tools:**
- Version scanning using package managers (e.g., `openssl version`).
- Vulnerability scanners (Nessus, OpenVAS) updated with the latest OVAL/plugin definitions.
## References
- **Vendor Advisory:** hxxps[://]openssl-library[.]org/news/vulnerabilities/
- **Cyber Centre Advisory:** hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/openssl-security-advisory-av26-846