CVE-2016-5696

Public on 2016-08-01
Modified on 2016-08-17
Description
It was found that the RFC 5961 challenge ACK rate limiting as implemented in the Linux kernel's networking subsystem allowed an off-path attacker to leak certain information about a given connection by creating congestion on the global challenge ACK rate limit counter and then measuring the changes by probing packets. An off-path attacker could use this flaw to either terminate TCP connection and/or inject payload into non-secured TCP connection between two endpoints on the network.
Severity
Important severity
Important
CVSS v3 Base Score
4.8
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 1 kernel 2016-08-01 ALAS-2016-726 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv2 5.8 AV:N/AC:M/Au:N/C:N/I:P/A:P
Amazon Linux CVSSv3 4.8 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
NVD CVSSv2 5.8 AV:N/AC:M/Au:N/C:N/I:P/A:P
NVD CVSSv3 4.8 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L