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.
History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.02023}

epss

{'score': 0.02078}


Fri, 28 Mar 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Fri, 22 Nov 2024 12:00:00 +0000


Wed, 13 Nov 2024 02:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/a:redhat:enterprise_linux:9
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux

Mon, 14 Oct 2024 15:45:00 +0000


Mon, 14 Oct 2024 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 14 Oct 2024 15:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1325

cve-icon MITRE

Status: PUBLISHED

Assigner: openssl

Published:

Updated: 2025-03-28T19:21:08.630Z

Reserved: 2024-03-15T15:33:52.037Z

Link: CVE-2024-2511

cve-icon Vulnrichment

Updated: 2024-08-01T19:18:46.968Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2024-04-08T14:15:07.660

Modified: 2025-03-28T20:15:22.200

Link: CVE-2024-2511

cve-icon Redhat

Severity : Low

Publid Date: 2024-04-08T00:00:00Z

Links: CVE-2024-2511 - Bugzilla

cve-icon OpenCVE Enrichment

No data.