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CVE-2024-41996

Publication date 26 August 2024

Last updated 23 September 2024


Ubuntu priority

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.

Read the notes from the security team

Why is this CVE low priority?

Resource consumption issue considered a bug fix by OpenSSL developers

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
edk2 24.04 LTS noble
Needs evaluation
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
nodejs 24.04 LTS noble
Not affected
22.04 LTS jammy
Needs evaluation
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
openssl 24.04 LTS noble
Vulnerable
22.04 LTS jammy
Vulnerable
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
openssl1.0 24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Not affected

Notes


alexmurray

Doesn't affect openssl 1.x


mdeslaur

as of 2024-09-23, has not been applied by upstream to the stable OpenSSL releases

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
openssl