What’s Vulnerable › Vulnerabilities

CVE-2023-24609

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-12-22 · updated 2026-06-17
• Weakness: CWE-190

Description

Matrix SSL 4.x through 4.6.0 and Rambus TLS Toolkit have a length-subtraction integer overflow for Client Hello Pre-Shared Key extension parsing in the TLS 1.3 server. An attacked device calculates an SHA-2 hash over at least 65 KB (in RAM). With a large number of crafted TLS messages, the CPU becomes heavily loaded. This occurs in tls13VerifyBinder and tls13TranscriptHashUpdate.

Affected products

• Inside Secure MatrixSSL: from 4.0.0 through 4.6.0
• Rambus Tls Toolkit: all versions

References

• https://www.rambus.com/security/software-protocols/tls-toolkit/
• https://www.telekom.com/en/company/data-privacy-and-security/news/advisories-504842
• https://www.rambus.com/security/software-protocols/tls-toolkit/
• https://www.telekom.com/en/company/data-privacy-and-security/news/advisories-504842

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