| Package | Affected versions | Patched versions |
|---|---|---|
| openvpn | = 1.2.0= 1.2.1= 1.3.0= 1.3.1= 1.3.2= 1.4.0= 1.4.1= 1.4.2= 1.4.3= 1.5.0= 1.6.0= 2.1.0= 2.2.0≤ 2.3.0 | |
| openvpn access server | = 2.0.0 |
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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