CVE-2013-2061
LOW · CVSS 2.6EPSS 2.8%EU EUVD
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.
Key facts
- CVSS score
- 2.6 (v2.0)
- Severity
- LOW
- CVSS vector
AV:N/AC:H/Au:N/C:P/I:N/A:N- Weakness (CWE)
- CWE-200
- EPSS score
- 2.8% (87th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2013-2042)
- Published
- November 18, 2013
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2013-2042 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- opensuse / opensuse
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn
- openvpn / openvpn access server
References
- http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105568.html
- http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105609.html
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00012.html(Vendor Advisory)
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00016.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:167
- http://www.openwall.com/lists/oss-security/2013/05/06/6
- https://bugs.gentoo.org/show_bug.cgi?id=468756
- https://bugzilla.redhat.com/show_bug.cgi?id=960192
- https://community.openvpn.net/openvpn/wiki/SecurityAnnouncement-f375aa67cc
- https://github.com/OpenVPN/openvpn/commit/11d21349a4e7e38a025849479b36ace7c2eec2ee(Exploit, Patch)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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