| Name | CVE-2008-4609 |
| Description | The 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. |
| Source | CVE (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 severity | high (attack range: remote) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | jessie (security), jessie | 3.16.56-1+deb8u1 | vulnerable |
| stretch | 4.9.82-1+deb9u3 | vulnerable | |
| stretch (security) | 4.9.88-1+deb9u1 | vulnerable | |
| buster | 4.16.12-1 | vulnerable | |
| sid | 4.16.16-2 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | (unstable) | (unfixed) | unimportant | ||
| linux-2.6 | source | (unstable) | (unfixed) | unimportant | ||
| linux-2.6.24 | source | (unstable) | (unfixed) | unimportant |
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