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CVE-2013-2061

12
FAUCET Score

CVE-2013-2061 describes a timing attack vulnerability in the openvpn_decrypt function of OpenVPN 2.3.0 and earlier, specifically when operating in UDP mode. This flaw allows remote attackers to potentially extract sensitive information due to a non-constant time HMAC comparison and a padding oracle attack on CBC mode ciphers. With a CVSS score of 2.6 (AV:N/AC:H/Au:N/C:P/I:N/A:N), this vulnerability requires high attack complexity and could lead to partial confidentiality compromise. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.3.0CPE matchmatch criteria
cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*
1.2.0CPE matchmatch criteria
cpe:2.3:a:openvpn:openvpn:1.2.0:*:*:*:*:*:*:*
1.2.1CPE matchmatch criteria
cpe:2.3:a:openvpn:openvpn:1.2.1:*:*:*:*:*:*:*
1.3.0CPE matchmatch criteria
cpe:2.3:a:openvpn:openvpn:1.3.0:*:*:*:*:*:*:*
1.3.1CPE matchmatch criteria
cpe:2.3:a:openvpn:openvpn:1.3.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.6LOW

AV:N/AC:H/Au:N/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.81%
Probability of exploitation in next 30 days
EPSS Percentile
85.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0281 is in the 83rd percentile among its peer group of 1,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
susevendor investigatingvia nvd_reference
View patch

References

lists.fedoraproject.org / pipermail/package-announce/2013-May/105568.html
lists.fedoraproject.org / pipermail/package-announce/2013-May/105609.html
lists.opensuse.org / opensuse-updates/2013-11/msg00012.html
Vendor Advisory
lists.opensuse.org / opensuse-updates/2013-11/msg00016.html
bugs.gentoo.org / show_bug.cgi
bugzilla.redhat.com / show_bug.cgi
community.openvpn.net / openvpn/wiki/SecurityAnnouncement-f375aa67cc
github.com / OpenVPN/openvpn/commit/11d21349a4e7e38a025849479b36ace7c2eec2ee
ExploitPatch
mandriva.com / security/advisories
openwall.com / lists/oss-security/2013/05/06/6