Test ID:	1.3.6.1.4.1.25623.1.0.50492
Category:	Ubuntu Local Security Checks
Title:	Ubuntu 4.10 USN-56-1 (exim4)
Summary:	NOSUMMARY
Description:	Description: The remote host is missing an update to exim4 announced via advisory USN-56-1. A flaw has been found in the host_aton() function, which can overflow a buffer if it is presented with an illegal IPv6 address that has more than 8 components. When supplying certain command line parameters, the input was not checked, so that a local attacker could possibly exploit the buffer overflow to run arbitrary code with the privileges of the Exim mail server. (CVE-2005-0021) Additionally, the BASE64 decoder in the SPA authentication handler did not check the size of its output buffer. By sending an invalid BASE64 authentication string, a remote attacker could overflow the buffer, which could possibly be exploited to run arbitrary code with the privileges of the Exim mail server. (CVE-2005-0022) The following packages are affected: exim4-daemon-heavy exim4-daemon-light Solution: The problem can be corrected by upgrading the affected package to version 4.34-5ubuntu1.1. In general, a standard system upgrade is sufficient to effect the necessary changes. http://lists.ubuntu.com/archives/ubuntu-security-announce/2005-January/000058.html Risk factor : High CVSS Score: 7.2
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2005-0021 CERT/CC vulnerability note: VU#132992 http://www.kb.cert.org/vuls/id/132992 Debian Security Information: DSA-635 (Google Search) http://www.debian.org/security/2005/dsa-635 Debian Security Information: DSA-637 (Google Search) http://www.debian.org/security/2005/dsa-637 http://security.gentoo.org/glsa/glsa-200501-23.xml http://www.idefense.com/application/poi/display?id=179&type=vulnerabilities http://www.idefense.com/application/poi/display?id=183&type=vulnerabilities http://www.exim.org/mail-archives/exim-users/Week-of-Mon-20050103/msg00028.html https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10347 http://www.redhat.com/support/errata/RHSA-2005-025.html Common Vulnerability Exposure (CVE) ID: CVE-2005-0022 BugTraq ID: 12188 http://www.securityfocus.com/bid/12188 Bugtraq: 20050212 exim auth_spa_server() PoC exploit (Google Search) http://marc.info/?l=bugtraq&m=110824870908614&w=2 http://www.idefense.com/application/poi/display?id=178&type=vulnerabilities https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11293
Copyright	Copyright (c) 2005 E-Soft Inc. http://www.securityspace.com

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