CVE-2024-2511

Advisory lineage Upstream: 0 Downstream: 19
Deferred
Published: 08 Apr 2024, 13:51
Last modified:12 May 2026, 11:30

Vulnerability Summary

Overall Risk (default)
medium
25/100
CVSS Score
5.9 MEDIUM
v3.1 (cve.org)
EPSS Score
8.83% LOW
9% probability +5.16%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

08 Apr 2024, 13:51
Published
Vulnerability first disclosed
12 May 2026, 11:30
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 8.83%• Percentile: 93%

Techniques & Countermeasures

  • CWE-1325•Improperly Controlled Sequential Memory Allocation

    The product manages a group of objects or resources and performs a separate memory allocation for each object, but it does not properly limit the total amount of memory that is consumed by all of the combined objects.

Affected Systems

  • Unknown•OpenSSL

    ≥ 3.2.0, < 3.2.2 | ≥ 3.1.0, < 3.1.6 | ≥ 3.0.0, < 3.0.14 | ≥ 1.1.1, < 1.1.1y

References (15)