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=========================================================== Ubuntu Security Notice USN-587-1 March 19, 2008 krb5 vulnerabilities CVE-2008-0062, CVE-2008-0063, CVE-2008-0947 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 6.10 Ubuntu 7.04 Ubuntu 7.10 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: libkadm55 1.4.3-5ubuntu0.7 libkrb53 1.4.3-5ubuntu0.7 Ubuntu 6.10: libkadm55 1.4.3-9ubuntu1.6 libkrb53 1.4.3-9ubuntu1.6 Ubuntu 7.04: libkadm55 1.4.4-5ubuntu3.4 libkrb53 1.4.4-5ubuntu3.4 Ubuntu 7.10: libkadm55 1.6.dfsg.1-7ubuntu0.1 libkrb53 1.6.dfsg.1-7ubuntu0.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: It was discovered that krb5 did not correctly handle certain krb4 requests. An unauthenticated remote attacker could exploit this flaw by sending a specially crafted traffic, which could expose sensitive information, cause a crash, or execute arbitrary code. (CVE-2008-0062, CVE-2008-0063) A flaw was discovered in the kadmind service's handling of file descriptors. An unauthenticated remote attacker could send specially crafted requests that would cause a crash, resulting in a denial of service. Only systems with configurations allowing large numbers of open file descriptors were vulnerable. (CVE-2008-0947)