Package : krb4 Vulnerability : Cryptographic weakness Problem-Type : remote Debian-specific: no CVE Id : CAN-2003-0138 CERT advisory : VU#623217
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.
Upgrade Instructions --------------------
wget url will fetch the file for you dpkg -i file.deb will install the referenced file.
If you are using the apt-get package manager, use the line for sources.list as given below:
apt-get update will update the internal database apt-get upgrade will install corrected packages
You may use an automated update by adding the resources from the footer to the proper configuration.
Debian GNU/Linux 2.2 alias potato ---------------------------------
