#VU98050 Resource exhaustion in Diffie-Hellman key exchange - CVE-2024-41996
Published: October 6, 2024
Vulnerability identifier: #VU98050
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2024-41996
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Diffie-Hellman key exchange
Diffie-Hellman key exchange
Software vendor:
Diffie-Hellman key exchange
Diffie-Hellman key exchange
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to unnecessary validation of the public keys in the Diffie-Hellman Key Agreement Protocol when an approved safe prime is used. A remote attacker from the client side can trigger unnecessarily expensive server-side DHE modular-exponentiation calculations and cause asymmetric resource consumption, resulting in a denial of service (DoS) attack.
Remediation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.