Information disclosure in Openvpn
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v2 metric
CVSS v2 base score 2.6 (Low). Vector: AV:N/AC:H/Au:N/C:P/I:N/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.028 (86.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000
Affected products
- Openvpn — versions 1.2.0, 1.2.1, 1.3.0
- Openvpn Access Server — versions 2.0.0
- openSUSE — versions 11.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.fedoraproject.org/pipermail/package-announce/2013-May/105568.html (vendor-advisory)
- lists.fedoraproject.org/pipermail/package-announce/2013-May/105609.html (vendor-advisory)
- lists.opensuse.org/opensuse-updates/2013-11/msg00012.html (vendor-advisory, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi
- www.openwall.com/lists/oss-security/2013/05/06/6 (mailing-list)
- www.mandriva.com/security/advisories (vendor-advisory)
- lists.opensuse.org/opensuse-updates/2013-11/msg00016.html (vendor-advisory)
- bugs.gentoo.org/show_bug.cgi
- github.com/OpenVPN/openvpn/commit/11d21349a4e7e38a025849479b36ace7c2eec2ee (Exploit, Patch)
- community.openvpn.net/openvpn/wiki/SecurityAnnouncement-f375aa67cc
Frequently asked questions
- What is CVE-2013-2061?
- CVE-2013-2061 is a vulnerability in Openvpn, classified under Information Disclosure. Published 2013-11-18.
- Is CVE-2013-2061 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.