Timing and Padding Oracle Vulnerability in OpenVPN 2.3.0 and Earlier

CVE-2013-2061 · LOW Severity

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

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.

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