RedHat: kerberos mutliple vulnerabilities
Summary
Summary
Kerberos is a network authentication system. The MIT Kerberos team released an advisory describing a number of vulnerabilities that affect the kerberos packages shipped as part of Red Hat Linux 9. These issues include: Vulnerabilities have been found in the triple-DES key support found in the implementation of the Kerberos IV authentication protocol included in MIT Kerberos. The Common Vulnerabilities and Exposures project has assigned the name CAN-2003-0139 to this issue. Vulnerabilities have been found in the Kerberos IV authentication protocol which allow an attacker with knowledge of a cross-realm key, which is shared with another realm, to impersonate any principal in that realm to any service in that realm. This vulnerability can only be closed by disabling cross-realm authentication in Kerberos IV (CAN-2003-0138). Vulnerabilities have been found in the RPC library used by the kadmin service in Kerberos 5. A faulty length check in the RPC library exposes kadmind to an integer overflow which can be used to crash kadmind (CAN-2003-0028). The Key Distribution Center (KDC) allows remote, authenticated attackers to cause a denial of service (crash) on KDCs within the same realm via a certain protocol request that causes the KDC to corrupt its heap (CAN-2003-0082). All users of Kerberos are advised to upgrade to these errata packages, which disable cross-realm authentication by default for Kerberos IV and which contain patches that correct these issues.
Solution
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
To update all RPMs for your particular architecture, run:
rpm -Fvh [filenames]
where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.
Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:
up2date
This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.
5. RPMs required:
Red Hat Linux 9:
SRPMS:
i386:
6. Verification:
MD5 sum Package Name
49e7783cb50c3694411b7856d098eff5 9/en/os/i386/krb5-devel-1.2.7-14.i386.rpm
6cb5040d3a4bd21a801e8c1e5da6388d 9/en/os/i386/krb5-libs-1.2.7-14.i386.rpm
8eb2a755c2fdf52b779960ec66cc6783 9/en/os/i386/krb5-server-1.2.7-14.i386.rpm
bbcde88fa4f273c7c45a927dc5b40d58 9/en/os/i386/krb5-workstation-1.2.7-14.i386.rpm
These packages are GPG signed by Red Hat for security. Our key is
available at All Red Hat products
You can verify each package with the following command:
rpm --checksig -v
If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
md5sum
References
Package List
Topic
Topic
Relevant Releases Architectures
Red Hat Linux 9 - i386
Bugs Fixed
