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.
References (2)
Core 2
Core References
Exploit, Third Party Advisory
https://www.telekom.com/en/company/data-privacy-and-security/news/advisories-504842
Scores
CVSS v3
7.5
EPSS
0.0073
EPSS Percentile
49.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-190
Status
published
Products (2)
matrixssl/matrixssl
4.0.0 - 4.6.0
rambus/tls_toolkit
Published
Dec 22, 2023
Tracked Since
Feb 18, 2026