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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 >> [DSA1189] DSA-1189-1 openssh-krb5 Vulnerability Assessment Details
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[DSA1189] DSA-1189-1 openssh-krb5 |
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DSA-1189-1 openssh-krb5 Detailed Explanation for this Vulnerability Assessment Several remote vulnerabilities have been discovered in OpenSSH, a free implementation of the Secure Shell protocol, which may lead to denial of service and potentially the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems: Tavis Ormandy of the Google Security Team discovered a denial of service vulnerability in the mitigation code against complexity attacks, which might lead to increased CPU consumption until a timeout is triggered. This is only exploitable if support for SSH protocol version 1 is enabled. Mark Dowd discovered that insecure signal handler usage could potentially lead to execution of arbitrary code through a double free. The Debian Security Team doesn't believe the general openssh package without Kerberos support to be exploitable by this issue. However, due to the complexity of the underlying code we will issue an update to rule out all eventualities. For the stable distribution (sarge) these problems have been fixed in version 3.8.1p1-7sarge1. For the unstable distribution (sid) these problems have been fixed in version 4.3p2-4 of openssh. openssh-krb5 will soon be converted towards a transitional package against openssh. We recommend that you upgrade your openssh-krb5 packages. Solution : http://www.debian.org/security/2006/dsa-1189 Network Security Threat Level: High Networks Security ID: Vulnerability Assessment Copyright: This script is (C) 2007 Michel Arboi |
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