drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Protokollfehler in heimdal
Name: |
Protokollfehler in heimdal
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ID: |
200305-09 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Mi, 28. Mai 2003, 13:00 |
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Referenzen: |
Keine Angabe |
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Applikationen: |
Heimdal |
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Originalnachricht |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
-------------------------------------------------------------------- GENTOO LINUX SECURITY ANNOUNCEMENT 200305-09 --------------------------------------------------------------------
PACKAGE : heimdal SUMMARY : protocol bug in the kerberos v4 cross-realm operation DATE : 2003-05-27 08:46 UTC EXPLOIT : remote VERSIONS AFFECTED : <heimdal-0.6 FIXED VERSION : >=heimdal-0.6 CVE : CAN-2003-0139 CAN-2003-0138
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heimdal suffers from the same vulnerability as mit-krb5 does, hence the identical advisory.
- From advisory: "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 included in the MIT krb5 distribution 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."
Read the full advisory at http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2003-004-krb4.txt
SOLUTION
It is recommended that all Gentoo Linux users who are running app-crypt/heimdal upgrade to heimdal-0.6 as follows
emerge sync emerge heimdal emerge clean
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