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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 >> [DSA514] DSA-514-1 kernel-image-sparc-2.2 Vulnerability Assessment Details
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[DSA514] DSA-514-1 kernel-image-sparc-2.2 |
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DSA-514-1 kernel-image-sparc-2.2 Detailed Explanation for this Vulnerability Assessment Paul Starzetz and Wojciech Purczynski of isec.pl 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) these problems have been fixed in version 9woody1 of Linux 2.2 kernel images for the sparc architecture and in version 2.2.20-5woody3 of Linux 2.2.20 source. For the unstable distribution (sid) these problems have been fixed in version 9.1 of Linux 2.2 kernel images for the sparc architecture. This problem has been fixed for other architectures already. We recommend that you upgrade your Linux kernel package. Solution : http://www.debian.org/security/2004/dsa-514 Network Security Threat Level: High Networks Security ID: 9686 Vulnerability Assessment Copyright: This script is (C) 2005 Michel Arboi |
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