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CVE-2016-8635

Published: 17 November 2016

It was found that Diffie Hellman Client key exchange handling in NSS 3.21.x was vulnerable to small subgroup confinement attack. An attacker could use this flaw to recover private keys by confining the client DH key to small subgroup of the desired group.

Priority

Medium

Cvss 3 Severity Score

5.9

Score breakdown

Status

Package Release Status
nss
Launchpad, Ubuntu, Debian
precise
Released (2:3.26.2-0ubuntu0.12.04.1)
trusty
Released (2:3.26.2-0ubuntu0.14.04.3)
upstream
Released (3.25)
xenial
Released (2:3.26.2-0ubuntu0.16.04.2)
yakkety Not vulnerable
(2:3.26-1ubuntu1)
zesty Not vulnerable
(2:3.26-1ubuntu1)
Patches:
vendor: https://git.centos.org/blob/rpms!nss!/aada6b10b73091276397404059605d13e7548462/SOURCES!moz-1314604.patch
upstream: https://hg.mozilla.org/projects/nss/rev/95bb47ef808b

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N