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Debian Security Advisory DSA 273-1 (krb4)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update to krb4 announced via advisory DSA 273-1.
Insight
Insight
A cryptographic weakness in version 4 of the Kerberos protocol allows an attacker to use a chosen-plaintext attack to impersonate any principal in a realm. Additional cryptographic weaknesses in the krb4 implementation permit the use of cut-and-paste attacks to fabricate krb4 tickets for unauthorized client principals if triple-DES keys are used to key krb4 services. These attacks can subvert a site's entire Kerberos authentication infrastructure. For the stable distribution (woody) this problem has been fixed in version 1.1-8-2.3. For the old stable distribution (woody) this problem has been fixed in version 1.0-2.3. For the unstable distribution (sid) this problem has been fixed in version 1.2.2-1. We recommend that you upgrade your krb4 packages immediately.
Solution
Solution
https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20273-1