--- title: "CVE-2005-0366\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-2005-0366?format=md keywords: index, follow --- # CVE-2005-0366 Publication date 2 May 2005 Last updated 17 July 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description The integrity check feature in OpenPGP, when handling a message that was encrypted using cipher feedback (CFB) mode, allows remote attackers to recover part of the plaintext via a chosen-ciphertext attack when the first 2 bytes of a message block are known, and an oracle or other mechanism is available to determine whether an integrity check failed. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | gnupg | 7.04 feisty | Fixed 1.2.5-4 | | 6.10 edgy | Fixed 1.4.3-2ubuntu3.3 | | 6.06 LTS dapper | Fixed 1.4.2.2-1ubuntu2.5 | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0366) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2005-0366) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2005-0366) * [Debian](https://security-tracker.debian.org/tracker/CVE-2005-0366) ### Related Ubuntu Security Notices (USN) + [USN-170-1](https://usn.ubuntu.com/USN-170-1) + gnupg vulnerability + 20 August 2005 ### Other references *