Rapid7

vulnerability

Ubuntu: (CVE-2024-41996): openssl vulnerability

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Aug 26, 2024
Added
Jun 26, 2025
Modified
Mar 27, 2026

Description

Validating the order of the public keys in the Diffie-Hellman Key Agreement Protocol, when an approved safe prime is used, allows remote attackers (from the client side) to trigger unnecessarily expensive server-side DHE modular-exponentiation calculations. The client may cause asymmetric resource consumption. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE and validate the order of the public key.

Solution

no-fix-ubuntu-package
Title
Rapid7 Labs

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