CVE-2016-5696

NameCVE-2016-5696
Descriptionnet/ipv4/tcp_input.c in the Linux kernel before 4.7 does not properly determine the rate of challenge ACK segments, which makes it easier for remote attackers to hijack TCP sessions via a blind in-window attack.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-609-1, DSA-3659-1
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)wheezy3.2.78-1vulnerable
wheezy (security)3.2.89-2fixed
jessie3.16.43-2+deb8u2fixed
jessie (security)3.16.43-2+deb8u3fixed
stretch4.9.30-2+deb9u2fixed
stretch (security)4.9.30-2+deb9u3fixed
buster, sid4.12.6-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.7.2-1medium
linuxsourcejessie3.16.36-1+deb8u1mediumDSA-3659-1
linuxsourcewheezy3.2.81-2mediumDLA-609-1

Notes

Introduced by: https://github.com/torvalds/linux/commit/282f23c6ee343126156dd41218b22ece96d747e3
Fixed by: https://github.com/torvalds/linux/commit/75ff39ccc1bd5d3c455b6822ab09e533c551f758

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