CVE-2016-8635

NameCVE-2016-8635
DescriptionIt 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
nss (PTS)jessie (security), jessie2:3.26-1+debu8u3fixed
stretch (security), stretch2:3.26.2-1.1+deb9u1fixed
buster2:3.40-1fixed
sid2:3.41-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
nsssource(unstable)2:3.25-1medium

Notes

Patch as applied in CentOS (but contains other changes):
https://git.centos.org/blob/rpms!nss!/aada6b10b73091276397404059605d13e7548462/SOURCES!moz-1314604.patch
Further info: https://bugzilla.redhat.com/show_bug.cgi?id=1391818
Upstream bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1314604

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