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Vulnerability Assessment & Network Security Forums |
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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery. Home >> Browse Vulnerability Assessment Database >> Debian Local Security Checks >> [DSA453] DSA-453-1 linux-kernel-2.2.20-i386+m68k+powerpc Vulnerability Assessment Details
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[DSA453] DSA-453-1 linux-kernel-2.2.20-i386+m68k+powerpc |
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DSA-453-1 linux-kernel-2.2.20-i386+m68k+powerpc Detailed Explanation for this Vulnerability Assessment Paul Starzetz and Wojciech Purczynski of isec.pl href="http://isec.pl/vulnerabilities/isec-0014-mremap-unmap.txt">discovered a critical security vulnerability in the memory management code of Linux inside the mremap(2) system call. Due to flushing the TLB (Translation Lookaside Buffer, an address cache) too early it is possible for an attacker to trigger a local root exploit. The attack vectors for 2.4.x and 2.2.x kernels are exclusive for the respective kernel series, though. We formerly believed that the exploitable vulnerability in 2.4.x does not exist in 2.2.x which is still true. However, it turned out that a second (sort of) vulnerability is indeed exploitable in 2.2.x, but not in 2.4.x, with a different exploit, of course. For the stable distribution (woody) this problem has been fixed in the following versions and architectures: For the unstable distribution (sid) this problem will be fixed soon for the architectures that still ship a 2.2.x kernel package. We recommend that you upgrade your Linux kernel package. Vulnerability matrix for CVE-2004-0077 Solution : http://www.debian.org/security/2004/dsa-453 Network Security Threat Level: High Networks Security ID: 9686 Vulnerability Assessment Copyright: This script is (C) 2005 Michel Arboi |
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