It was found that ntpd did not check whether a Message Authentication Code (MAC) was present in a received packet when ntpd was configured to use symmetric cryptographic keys. A man-in-the-middle attacker could use this flaw to send crafted packets that would be accepted by a client or a peer without the attacker knowing the symmetric key.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 1 | ntp | 2015-05-05 15:56 | ALAS-2015-520 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv2 | 2.6 | AV:N/AC:H/Au:N/C:N/I:P/A:N |
NVD | CVSSv2 | 1.8 | AV:A/AC:H/Au:N/C:N/I:P/A:N |