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TITLE:
ISC DHCP "script_write_params()" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA35785

VERIFY ADVISORY:
http://secunia.com/advisories/35785/

DESCRIPTION:
A vulnerability has been reported in ISC DHCP, which can be exploited
by malicious people to cause a DoS (Denial of Service) and potentially
compromise a user's system.

The vulnerability is caused due to a boundary error within the
"script_write_params()" function in client/dhclient.c and can be
exploited to cause a stack-based buffer overflow by sending an overly
long subnet-mask option.

Successful exploitation may allow execution of arbitrary code with
"root" privileges, but requires that dhclient processes a specially
crafted response from a malicious DHCP server.

The vulnerability is reported in DHCP 2.0 through 4.1.

SOLUTION:
Update to 3.1.2p1, 4.0.1p1, or 4.1.0p1.
https://www.isc.org/downloadables/12

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Mandriva Linux Engineering Team.

ORIGINAL ADVISORY:
ISC:
https://www.isc.org/node/468

OTHER REFERENCES:
US-CERT VU#410676:
http://www.kb.cert.org/vuls/id/410676

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