[SA23631] Fetchmail TLS Configuration Security Issue and "MDA" Denial of Service

[Secunia Security Advisories <[EMAIL PROTECTED]>]

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TITLE:
Fetchmail TLS Configuration Security Issue and "MDA" Denial of
Service

SECUNIA ADVISORY ID:
SA23631

VERIFY ADVISORY:
http://secunia.com/advisories/23631/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information, DoS

WHERE:
>From local network

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

DESCRIPTION:
A vulnerability and a security issue have been reported in Fetchmail,
which can be exploited by malicious, local users to cause a DoS
(Denial of Service) and by malicious people to gain knowledge of
sensitive information.

1) A NULL pointer dereference error in Fetchmail, when refusing a
message that was bound for delivery by a message delivery agent (MDA)
via the "mda" option, can be exploited to crash the service.

2) Several errors could lead to the authentication in plain text
despite the configured settings, resulting in the possibility of
passwords being eavesdropped.

The vulnerabilities are reported in version 6.3.5.

SOLUTION:
Update to version 6.3.6.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1) Neil Hoggarth
2) Isaac Wilcox

ORIGINAL ADVISORY:
1) http://fetchmail.berlios.de/fetchmail-SA-2006-03.txt
2) http://fetchmail.berlios.de/fetchmail-SA-2006-02.txt

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