CVE Database


Impact: Moderate
Public: 2013-02-05
Bugzilla: 908029: CVE-2012-2686 openssl: DoS due to improper handling of CBC ciphersuites in TLS 1.1/1.2 on AES-NI supporting platforms
IAVA: 2013-A-0077


The MITRE CVE dictionary describes this issue as:

crypto/evp/e_aes_cbc_hmac_sha1.c in the AES-NI functionality in the TLS 1.1 and 1.2 implementations in OpenSSL 1.0.1 before 1.0.1d allows remote attackers to cause a denial of service (application crash) via crafted CBC data.

Find out more about CVE-2012-2686 from the MITRE CVE dictionary and NIST NVD.


Not vulnerable. This issue did not affect the versions of OpenSSL as shipped with Red Hat Enterprise Linux 5 and 6 as they did not include support for TLS 1.2 or 1.1.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score: 5.0
Base Metrics: AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector: Network
Access Complexity: Low
Authentication: None
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date

External References

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For clarification or corrections please contact the Red Hat Security Response Team.