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freebsdFreeBSD92F30415-9935-11E2-AD4C-080027EF73EC
HistoryMar 19, 2013 - 12:00 a.m.

OpenVPN -- potential side-channel/timing attack when comparing HMACs

2013-03-1900:00:00
vuxml.freebsd.org
12

2.6 Low

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

0.005 Low

EPSS

Percentile

75.9%

The OpenVPN project reports:

OpenVPN 2.3.0 and earlier running in UDP mode are subject
to chosen ciphertext injection due to a non-constant-time
HMAC comparison function.

OSVersionArchitecturePackageVersionFilename
FreeBSDanynoarchopenvpn< 2.0.9_4UNKNOWN

2.6 Low

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

0.005 Low

EPSS

Percentile

75.9%