CVE-2024-2511 Affecting openssl-libs package, versions <1:3.2.2-6.el9_5
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Test your applications- Snyk ID SNYK-ALMALINUX9-OPENSSLLIBS-8400177
- published 20 Nov 2024
- disclosed 12 Nov 2024
How to fix?
Upgrade AlmaLinux:9 openssl-libs to version 1:3.2.2-6.el9_5 or higher.
This issue was patched in ALSA-2024:9333.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssl-libs package and not the openssl-libs package as distributed by AlmaLinux.
See How to fix? for AlmaLinux:9 relevant fixed versions and status.
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.
References
- https://errata.almalinux.org/9/ALSA-2024-9333.html
- https://access.redhat.com/security/cve/CVE-2024-2511
- https://access.redhat.com/errata/RHSA-2024:9333
- http://www.openwall.com/lists/oss-security/2024/04/08/5
- https://github.com/openssl/openssl/commit/7e4d731b1c07201ad9374c1cd9ac5263bdf35bce
- https://github.com/openssl/openssl/commit/b52867a9f618bb955bed2a3ce3db4d4f97ed8e5d
- https://github.com/openssl/openssl/commit/e9d7083e241670332e0443da0f0d4ffb52829f08
- https://github.openssl.org/openssl/extended-releases/commit/5f8d25770ae6437db119dfc951e207271a326640
- https://security.netapp.com/advisory/ntap-20240503-0013/
- https://www.openssl.org/news/secadv/20240408.txt