--- title: "CVE-2009-5138\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-2009-5138?format=md keywords: index, follow --- # CVE-2009-5138 Publication date 7 March 2014 Last updated 24 July 2024 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description GnuTLS before 2.7.6, when the GNUTLS\_VERIFY\_ALLOW\_X509\_V1\_CA\_CRT flag is not enabled, treats version 1 X.509 certificates as intermediate CAs, which allows remote attackers to bypass intended restrictions by leveraging a X.509 V1 certificate from a trusted CA to issue new certificates, a different vulnerability than CVE-2014-1959. [Read the notes from the security team](https://ubuntu.com/security/CVE-2009-5138?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | gnutls26 | 13.10 saucy | Not affected | | 12.10 quantal | Not affected | | 12.04 LTS precise | Not affected | | 10.04 LTS lucid | Not affected | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## Notes --- ### [mdeslaur](https://launchpad.net/~mdeslaur) before 2.7.6 only ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-5138) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2009-5138) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2009-5138) * [Debian](https://security-tracker.debian.org/tracker/CVE-2009-5138) ### Other references * *