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Vulnerability · Published Aug 26, 2024 · Assigned by mitre

CVE-2024-41996

High 7.5

In plain English

A high-severity improper certificate validation in the edk2 package (Ubuntu). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.1%top 34.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Ubuntu:24.04:LTSedk2no fix listedUBUNTU-CVE-2024-41996
Ubuntu:22.04:LTSnodejsno fix listedUBUNTU-CVE-2024-41996
Ubuntu:22.04:LTSopensslno fix listedUBUNTU-CVE-2024-41996
Ubuntu:24.04:LTSopensslno fix listedUBUNTU-CVE-2024-41996

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References