CVE-2013-2061

Public Exploit

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.

Category

2.6
CVSS
Severity: Low
CVSS 2.0 •
EPSS 1.45% Top 25%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory mandriva.com Vendor Advisory opensuse.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105568.html vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105609.html vendor advisory
http://lists.opensuse.org/opensuse-updates/2013-11/msg00012.html vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=960192
http://www.openwall.com/lists/oss-security/2013/05/06/6 mailing list
http://www.mandriva.com/security/advisories?name=MDVSA-2013:167 vendor advisory
http://lists.opensuse.org/opensuse-updates/2013-11/msg00016.html vendor advisory
https://bugs.gentoo.org/show_bug.cgi?id=468756
https://github.com/OpenVPN/openvpn/commit/11d21349a4e7e38a025849479b36ace7c2eec2ee patch exploit
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncement-f375aa67cc

Frequently Asked Questions

What is the severity of CVE-2013-2061?
CVE-2013-2061 has been scored as a low severity vulnerability.
How to fix CVE-2013-2061?
To fix CVE-2013-2061, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2013-2061 being actively exploited in the wild?
It is possible that CVE-2013-2061 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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