=========================================================== Ubuntu Security Notice USN-612-1 May 13, 2008 openssl vulnerability CVE-2008-0166 =========================================================== A weakness has been discovered in the random number generator used by OpenSSL on Debian and Ubuntu systems. As a result of this weakness, certain encryption keys are much more common than they should be, such that an attacker could guess the key through a brute-force attack given minimal knowledge of the system. This particularly affects the use of encryption keys in OpenSSH, OpenVPN and SSL certificates. This vulnerability only affects operating systems which (like Ubuntu) are based on Debian. However, other systems can be indirectly affected if weak keys are imported into them. We consider this an extremely serious vulnerability, and urge all users to act immediately to secure their systems. (CVE-2008-0166) This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. == Who is affected == Systems which are running any of the following releases: * Ubuntu 7.04 (Feisty) * Ubuntu 7.10 (Gutsy) * Ubuntu 8.04 LTS (Hardy) * Ubuntu "Intrepid Ibex" (development): libssl <= 0.9.8g-8 * Debian 4.0 (etch) (see corresponding Debian security advisory) and have openssh-server installed or have been used to create an OpenSSH key or X.509 (SSL) certificate. All OpenSSH and X.509 keys generated on such systems must be considered untrustworthy, regardless of the system on which they are used, even after the update has been applied. This includes the automatically generated host keys used by OpenSSH, which are the basis for its server spoofing and man-in-the-middle protection. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 7.04: libssl0.9.8 0.9.8c-4ubuntu0.3 Ubuntu 7.10: libssl0.9.8 0.9.8e-5ubuntu3.2 Ubuntu 8.04 LTS: libssl0.9.8 0.9.8g-4ubuntu3.1 Updated packages for Ubuntu 7.04: Source archives: http://security.ubuntu.com/ubuntu/pool/main/o/openssl/openssl_0.9.8c-4ubuntu0.3.diff.gz Size/MD5: 55960 f1528622672403589e0d3aac4091e3b7 http://security.ubuntu.com/ubuntu/pool/main/o/openssl/openssl_0.9.8c-4ubuntu0.3.dsc Size/MD5: 899 24ce07dd1372b34976caa4e703b48254 http://security.ubuntu.com/ubuntu/pool/main/o/openssl/openssl_0.9.8c.orig.tar.gz Size/MD5: 3313857 78454bec556bcb4c45129428a766c886 amd64 architecture (Athlon64, Opteron, EM64T Xeon): http://security.ubuntu.com/ubuntu/pool/main/o/openssl/libcrypto0.9.8-udeb_0.9.8c-4ubuntu0.3_amd64.udeb Size/MD5: 604324 c67285c8c9831d7d688930bf3403070e http://security.ubuntu.com/ubuntu/pool/main/o/openssl/libssl-dev_0.9.8c-4ubuntu0.3_amd64.deb Size/MD5: 2186920 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