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TITLE:
Samba Winbind Library Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA24043

VERIFY ADVISORY:
http://secunia.com/advisories/24043/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From local network

SOFTWARE:
Samba 3.x
http://secunia.com/product/2999/

DESCRIPTION:
Two vulnerabilities have been reported in Samba, which potentially
can be exploited by malicious people to compromise a vulnerable
system.

The vulnerabilities are caused due to boundary errors within the
"gethostbyname()" and "getipnodebyname()" functions in the
"nss_winbind.so.1" library. This can be exploited to cause a buffer
overflow via an overly large string passed to the NSS interface.

Successful exploitation may allow execution of arbitrary code, but
requires that the winbindd daemon is running and configured to use
the "nss_winbind.so.1" library.

The vulnerabilities are reported in version 3.0.21 through 3.0.23d
running on Sun Solaris.

SOLUTION:
Update to version 3.0.24.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Olivier Gay.

ORIGINAL ADVISORY:
http://us1.samba.org/samba/security/CVE-2007-0453.html

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About:
This Advisory was delivered by Secunia as a free service to help
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