Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

CVE-2024-2511

Published: 8 April 2024

Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions Impact summary: An attacker may exploit certain server configurations to trigger unbounded memory growth that would lead to a Denial of Service This problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is being used (but not if early_data support is also configured and the default anti-replay protection is in use). In this case, under certain conditions, the session cache can get into an incorrect state and it will fail to flush properly as it fills. The session cache will continue to grow in an unbounded manner. A malicious client could deliberately create the scenario for this failure to force a Denial of Service. It may also happen by accident in normal operation. This issue only affects TLS servers supporting TLSv1.3. It does not affect TLS clients. The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 1.0.2 is also not affected by this issue.

Notes

AuthorNote
Priority reason:
Upstream OpenSSL developers consider this a low severity issue

Priority

Low

Status

Package Release Status
edk2
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needed

jammy Needed

mantic Ignored
(end of life, was needed)
noble Needed

upstream Needs triage

xenial Needs triage

nodejs
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Not vulnerable
(uses system openssl)
jammy Needed

mantic Not vulnerable
(uses system openssl)
noble Not vulnerable
(uses system openssl)
trusty Not vulnerable
(uses system openssl)
upstream Needs triage

xenial Needs triage

openssl
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needed

jammy Needed

mantic Ignored
(end of life, was needed)
noble Needed

trusty Needs triage

upstream Needs triage

xenial Needs triage

Patches:
upstream: https://github.com/openssl/openssl/commit/b52867a9f618bb955bed2a3ce3db4d4f97ed8e5d
openssl1.0
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(1.0.2 not affected)
focal Does not exist

jammy Does not exist

mantic Does not exist

noble Does not exist

upstream Needs triage