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MIT Kerberos Telnet Client Buffer Overflow Vulnerabilities
Secunia Advisory: SA14745
Release Date: 2005-03-29
Last Update: 2005-04-04
Popularity: 19,941 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:
Gaël Delalleau has reported two vulnerabilities in Kerberos V5, which can be exploited by malicious people to compromise a vulnerable system.

1) A boundary error in the "slc_add_reply()" function in the included telnet client when handling LINEMODE suboptions can be exploited to cause buffer overflow via a specially crafted reply containing a large number of SLC (Set Local Character) commands.

2) A boundary error in the "env_opt_add()" function in the included telnet client when handling NEW-ENVIRON suboptions can be exploited to cause a heap-based buffer overflow via a specially crafted reply containing a large number of characters that need escaping.

Successful exploitation allows execution of arbitrary code, but requires that a user connects to a malicious server with the vulnerable telnet client.

The vulnerabilities affect versions up to and including release krb5-1.4.

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



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