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Kerberos V5 "libkadm5srv" Buffer Overflow Vulnerability
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Secunia Advisory:
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SA13592
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Release Date:
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2004-12-21
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Popularity:
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14,502 views
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Critical:
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Moderately critical
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Impact:
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System access
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| Software: | Kerberos 5.x
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| CVE reference: | CVE-2004-1189
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Description:
Michael Tautschnig has reported a vulnerability in Kerberos V5, which potentially can be exploited by malicious users to compromise a vulnerable system.
The vulnerability is caused due to a boundary error in the libkadm5srv administration library within the "add_to_history()" function during the password history handling. This can be exploited to cause a heap-based buffer overflow when a principal changes the password and has a certain password history state.
Successful exploitation may allow execution of arbitrary code on a vulnerable Key Distribution Center (KDC) server. However, this requires that the administrator has performed a certain password policy change.
The vulnerability has been reported in version 1.3.5 and prior.
Solution:
Apply patch for version 1.3.5:
http://web.mit.edu/kerberos/advisories/2004-004-patch_1.3.5.txt
http://web.mit.edu/kerberos/advisories/2004-004-patch_1.3.5.txt.asc
The vulnerability is fixed in version 1.4-beta3. The vulnerability will reportedly be fixed in the upcoming krb5-1.4 release and krb5-1.3.6 patch release.
Provided and/or discovered by:
Michael Tautschnig
Original Advisory:
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-004-pwhist.txt
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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