CVE-2008-4609

NameCVE-2008-4609
DescriptionThe TCP implementation in (1) Linux, (2) platforms based on BSD Unix, (3) Microsoft Windows, (4) Cisco products, and probably other operating systems allows remote attackers to cause a denial of service (connection queue exhaustion) via multiple vectors that manipulate information in the TCP state table, as demonstrated by sockstress.
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 severityhigh (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)3.2.96-3vulnerable
jessie3.16.51-2vulnerable
jessie (security)3.16.51-3+deb8u1vulnerable
stretch (security), stretch4.9.82-1+deb9u3vulnerable
buster4.15.11-1vulnerable
sid4.15.17-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)(unfixed)unimportant
linux-2.6source(unstable)(unfixed)unimportant
linux-2.6.24source(unstable)(unfixed)unimportant

Notes

this is a design flaw in TCP itself; maximum impact is a denial-of-service
there is no upstream solution
see http://kbase.redhat.com/faq/docs/DOC-18730 for possible mitigation via iptables
also see usage of ipt_connlimit as a mitigation strategy

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