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CVE-2024-2511

Publication date 8 April 2024

Last updated 31 July 2024

Ubuntu priority

Low

Why this priority?

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.

Why is this CVE low priority?

Upstream OpenSSL developers consider this a low severity issue

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
edk2 24.04 LTS noble
Vulnerable
23.10 mantic Ignored
22.04 LTS jammy
Vulnerable
20.04 LTS focal
Vulnerable
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
nodejs 24.04 LTS noble
Not affected
23.10 mantic
Not affected
22.04 LTS jammy
Vulnerable
20.04 LTS focal
Not affected
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Not affected
openssl 24.04 LTS noble
Fixed 3.0.13-0ubuntu3.2
23.10 mantic Ignored
22.04 LTS jammy
Fixed 3.0.2-0ubuntu1.17
20.04 LTS focal
Fixed 1.1.1f-1ubuntu2.23
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation
openssl1.0 24.04 LTS noble Not in release
23.10 mantic Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Not affected

Patch details

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

Package Patch details
openssl

References

Related Ubuntu Security Notices (USN)

Other references