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Kerberos V5 "krb5_aname_to_localname()" Buffer Overflow Vulnerabilities
Secunia Advisory: SA11753
Release Date: 2004-06-02
Last Update: 2004-06-05
Popularity: 13,420 views

Critical:
Moderately critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:Kerberos 5.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

Description:
Vulnerabilities have been discovered in Kerberos V5, which can be exploited by malicious users to compromise a vulnerable system.

The vulnerabilities are caused due to boundary errors within the "krb5_aname_to_localname()" library function during conversion of Kerberos principal names into local account names. These can be exploited to cause heap-based buffer overflows by passing an overly long principal name when authenticating.

Exploitation may allow execution of arbitrary code on a vulnerable system with root privileges. However, this requires successful authentication to a vulnerable service, and the explicit mapping or rules-based mapping functionality has been enabled (not default configuration).

The vulnerabilities affect version 1.3.3 and prior.

Change Page:
[ 1 ] [ 2 ] [ 3 ]



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