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.
Advisories
Source ID Title
EUVD EUVD EUVD-2013-2042 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.
Ubuntu USN Ubuntu USN USN-2368-1 OpenVPN vulnerability
Fixes

Solution

No solution given by the vendor.


Workaround

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History

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Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-06T15:20:37.491Z

Reserved: 2013-02-19T00:00:00.000Z

Link: CVE-2013-2061

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2013-11-18T02:55:07.530

Modified: 2026-04-29T01:13:23.040

Link: CVE-2013-2061

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses