CVSS2
Attack Vector
NETWORK
Attack Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:H/Au:N/C:P/I:N/A:N
EPSS
Percentile
77.9%
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.