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TITLE:
Fetchmail Large Header Processing Denial of Service

SECUNIA ADVISORY ID:
SA30742

VERIFY ADVISORY:
http://secunia.com/advisories/30742/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
Fetchmail 6.x
http://secunia.com/product/370/

DESCRIPTION:
A vulnerability has been reported in Fetchmail, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error when printing overly
large e-mail headers (over 2048 bytes) and can be exploited to crash
the application.

Successful exploitation requires that Fetchmail is started with high
verbosity (two or more "-v" arguments are used).

The vulnerability is reported in versions prior to 6.3.9.

SOLUTION:
Update to version 6.3.9 as soon as available or apply patch for
version 6.3.8. Please see vendor's advisory for more details.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Gunter Nau.

ORIGINAL ADVISORY:
http://www.fetchmail.info/fetchmail-SA-2008-01.txt

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
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Definitions: (Criticality, Where etc.)
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Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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