Vulnerability Report

CVE-2013-2061

Title: Openvpn Openvpn Information Disclosure

Information Disclosure

Proof Of Concept

No public PoC currently indexed for CVE-2013-2061.

CWE Category CWE-200

Published Date Nov 18, 2013

Modified Date Jun 16, 2026

Exploit Status Not Found

Score 2.6 CVSS v2.0

Exploit Probability (EPSS)

2.81%

Vulnerability Summary

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 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.

Impacted Vendors

openvpn 2

aviatrix 1

Reference Links

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 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 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 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

CVSS v2.0

Source Entity [email protected]

Severity LOW

2.6

Access Vector

N/A

Authentication

N/A

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2013-2061 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 29, 2026 MODIFIED

Vulnerability data updated via NVD.

April 11, 2025 MODIFIED

Vulnerability data or affected products updated.

November 18, 2013 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.