Test ID:	1.3.6.1.4.1.25623.1.1.12.2005.56.1
Category:	Ubuntu Local Security Checks
Title:	Ubuntu: Security Advisory (USN-56-1)
Summary:	The remote host is missing an update for the 'exim4' package(s) announced via the USN-56-1 advisory.
Description:	Summary: The remote host is missing an update for the 'exim4' package(s) announced via the USN-56-1 advisory. Vulnerability Insight: 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. (CAN-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. (CAN-2005-0022) Affected Software/OS: 'exim4' package(s) on Ubuntu 4.10. Solution: Please install the updated package(s). CVSS Score: 7.2 CVSS Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C
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
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