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CVE-2013-2061
The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain…
Low2.6EPSS 2.8%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Low2.6 | AV:N/AC:H/Au:N/C:P/I:N/A:N |
- EPSS (exploitation in 30 days)
- 2.8% · top 13% of all CVEs (6 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.6.
Weakness
Affected products
n/a
- affected n/a
References (10)
- FEDORA-2013-7552 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2013-7531 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- openSUSE-SU-2013:1645 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=960192 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20130506 Re: CVE request: OpenVPN use of non-constant-time memcmp in HMAC comparison in openvpn_decrypt (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- MDVSA-2013:167 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- openSUSE-SU-2013:1649 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://bugs.gentoo.org/show_bug.cgi?id=468756 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/OpenVPN/openvpn/commit/11d21349a4e7e38a025849479b36ace7c2eec2ee (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://community.openvpn.net/openvpn/wiki/SecurityAnnouncement-f375aa67cc (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2013-2061)Record last updated .