CVE Database

CVE-2013-2061

Impact: Low
Public: 2013-03-22
Bugzilla: 960192: CVE-2013-2061 openvpn: use of non-constant-time memcmp in HMAC comparison in openvpn_decrypt

Details

The MITRE CVE dictionary describes this issue as:

The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on the CBC mode cipher.

Find out more about CVE-2013-2061 from the MITRE CVE dictionary and NIST NVD.

CVSS v2 metrics

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

Base Score: 4.0
Base Metrics: AV:N/AC:H/Au:N/C:P/I:P/A:N
Access Vector: Network
Access Complexity: High
Authentication: None
Confidentiality Impact: Partial
Integrity Impact: Partial
Availability Impact: None

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.