Out-of-bounds read in wolfSSL - CVE-2023-6936
Published: December 28, 2023
Vulnerability identifier: #VU84840
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-6936
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when processing a malformed ClientHello message in servers connecting over TLS 1.3 when the optional WOLFSSL_CALLBACKS has been defined. A remote attacker can trigger an out-of-bounds read error and read contents of memory on the system.
Affected software
wolfSSL
How to mitigate CVE-2023-6936
Install updates from vendor's website.
wolfSSL - update to 5.6.6