Eudora URL Handling Buffer Overflow Vulnerability
Secunia Advisory: SA11568
Release Date: 2004-05-07
Last Update: 2004-05-21
Popularity: 14,866 views

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:Eudora 5.x
Eudora 6.x

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Description:
Paul Szabo has reported a vulnerability in Eudora, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error within the URL handling functionality. This can be exploited via a malicious email containing a specially crafted overly long link (about 300 bytes).

Successful exploitation allows execution of arbitrary code on a vulnerable system, but requires that the user is tricked into clicking the malicious URL.

The vulnerability has been reported in versions 6.1 and prior for Windows. Other versions may also be affected.

Solution:
Qualcomm has released version 6.1.1 which reportedly fixes the URL handling vulnerability:

http://www.eudora.com/download/

Note: According to Paul Szabo at least two vulnerabilities allowing malicious people to steal documents if a message is forwarded or to bypass the LaunchProtect "feature" are not resolved in version 6.1.1.

Provided and/or discovered by:
Paul Szabo

Changelog:
2004-05-21: Updated solution.

Original Advisory:
http://www.maths.usyd.edu.au/u/psz/securepc.html#Eudoraxx

http://www.eudora.com/download/eudora/windows/6.1.1/RelNotes.txt


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