--- title: "CVE-2009-4016\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2009-4016?format=md keywords: index, follow --- # CVE-2009-4016 Publication date 4 February 2010 Last updated 24 July 2024 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description Integer underflow in the clean\_string function in irc\_string.c in (1) IRCD-hybrid 7.2.2 and 7.2.3, (2) ircd-ratbox before 2.2.9, and (3) oftc-hybrid before 1.6.8, when flatten\_links is disabled, allows remote attackers to execute arbitrary code or cause a denial of service (daemon crash) via a LINKS command. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | ircd-hybrid | 18.10 cosmic | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 18.04 LTS bionic | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 17.10 artful | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 17.04 zesty | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 16.10 yakkety | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 16.04 LTS xenial | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 15.10 wily | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 15.04 vivid | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 14.10 utopic | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 14.04 LTS trusty | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 13.10 saucy | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 13.04 raring | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 12.10 quantal | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 12.04 LTS precise | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 11.10 oneiric | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 11.04 natty | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 10.10 maverick | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 10.04 LTS lucid | Fixed 1:7.2.2.dfsg.2-6ubuntu3 | | 9.10 karmic | Fixed 1:7.2.2.dfsg.2-6ubuntu2.0.9.10.1 | | 9.04 jaunty | Fixed 1:7.2.2.dfsg.2-6ubuntu1.1 | | 8.10 intrepid | Fixed 1:7.2.2.dfsg.2-4+lenny1build0.8.10.1 | | 8.04 LTS hardy | Fixed 1:7.2.2.dfsg.2-3+etch1build0.8.04.1 | | 6.06 LTS dapper | Ignored end of life | | ircd-ratbox | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.10 yakkety | Not in release | | 16.04 LTS xenial | Not in release | | 15.10 wily | Ignored end of life | | 15.04 vivid | Ignored end of life | | 14.10 utopic | Ignored end of life | | 14.04 LTS trusty | Not in release | | 13.10 saucy | Ignored end of life | | 13.04 raring | Ignored end of life | | 12.10 quantal | Ignored end of life | | 12.04 LTS precise | Ignored end of life | | 11.10 oneiric | Ignored end of life | | 11.04 natty | Ignored end of life | | 10.10 maverick | Ignored end of life | | 10.04 LTS lucid | Ignored end of life | | 9.10 karmic | Ignored end of life | | 9.04 jaunty | Ignored end of life | | 8.10 intrepid | Ignored end of life | | 8.04 LTS hardy | Ignored end of life | | 6.06 LTS dapper | Not in release | | oftc-hybrid | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.10 yakkety | Not in release | | 16.04 LTS xenial | Not in release | | 15.10 wily | Not in release | | 15.04 vivid | Not in release | | 14.10 utopic | Not in release | | 14.04 LTS trusty | Not in release | | 13.10 saucy | Not in release | | 13.04 raring | Ignored end of life | | 12.10 quantal | Ignored end of life | | 12.04 LTS precise | Ignored end of life | | 11.10 oneiric | Ignored end of life | | 11.04 natty | Ignored end of life | | 10.10 maverick | Ignored end of life | | 10.04 LTS lucid | Ignored end of life | | 9.10 karmic | Ignored end of life | | 9.04 jaunty | Ignored end of life | | 8.10 intrepid | Ignored end of life | | 8.04 LTS hardy | Ignored end of life | | 6.06 LTS dapper | Not in release | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) * [Patch details](https://ubuntu.com/security/CVE-2009-4016?format=md#patch-details) ### Patch details For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) | Package | Patch details | | --- | --- | | ircd-hybrid | * Upstream: | ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-4016) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2009-4016) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2009-4016) * [Debian](https://security-tracker.debian.org/tracker/CVE-2009-4016) ### Other references * *