CVE-2013-2061

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Summary

CVECVE-2013-2061
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2013-11-18 02:55:07 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 2.6 from [email protected]

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

Problem Types: CWE-200 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
High
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Opensuse Opensuse 11.4 All All All
Application Openvpn Openvpn 1.2.0 All All All
Application Openvpn Openvpn 1.2.1 All All All
Application Openvpn Openvpn 1.3.0 All All All
Application Openvpn Openvpn 1.3.1 All All All
Application Openvpn Openvpn 1.3.2 All All All
Application Openvpn Openvpn 1.4.0 All All All
Application Openvpn Openvpn 1.4.1 All All All
Application Openvpn Openvpn 1.4.2 All All All
Application Openvpn Openvpn 1.4.3 All All All
Application Openvpn Openvpn 1.5.0 All All All
Application Openvpn Openvpn 1.6.0 All All All
Application Openvpn Openvpn 2.1.0 All All All
Application Openvpn Openvpn 2.2.0 All All All
Application Openvpn Openvpn All All All All
Application Openvpn Openvpn Access Server 2.0.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[SECURITY] Fedora 17 Update: openvpn-2.3.1-2.fc17 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
oss-security - Re: CVE request: OpenVPN use of non-constant-time memcmp in HMAC comparison in openvpn_decrypt af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
[SECURITY] Fedora 18 Update: openvpn-2.3.1-2.fc18 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
468756 – (CVE-2013-2061) <net-misc/openvpn-2.3.1: ciphertext injection vulnerability in UDP mode (CVE-2013-2061) af854a3a-2127-422b-91ae-364da2661108 bugs.gentoo.org
Use constant time memcmp when comparing HMACs in openvpn_decrypt. · 11d2134 · OpenVPN/openvpn · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Exploit, Patch
Bug 960192 – CVE-2013-2061 openvpn: use of non-constant-time memcmp in HMAC comparison in openvpn_decrypt af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
Support / Security / Advisories / / MDVSA-2013:167 | Mandriva af854a3a-2127-422b-91ae-364da2661108 www.mandriva.com
openSUSE-SU-2013:1645-1: moderate: update for openvpn af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Vendor Advisory
SecurityAnnouncement-f375aa67cc – OpenVPN Community af854a3a-2127-422b-91ae-364da2661108 community.openvpn.net
openSUSE-SU-2013:1649-1: moderate: update for openvpn af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
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