TITLE:
w3m Certificate Handling Format String Vulnerability
SECUNIA ADVISORY ID:
SA23492
VERIFY ADVISORY:
http://secunia.com/advisories/23492/
CRITICAL:
Highly critical
IMPACT:
System access
WHERE:
>From remote
SOFTWARE:
w3m 0.x
http://secunia.com/product/12960/
DESCRIPTION:
A vulnerability has been reported in w3m, which potentially can be
exploited by malicious people to compromise a user's system.
The vulnerability is caused due to a format string error when
handling SSL certificates and can be exploited via a specially
crafted SSL certificate containing format specifiers in the "CN"
field.
Successful exploitation may allow execution of arbitrary code when
e.g. visiting a malicious website, but requires that the application
is running with either the "-dump" or "-backend" option.
The vulnerability is reported in version 0.5.1. Other versions may
also be affected.
SOLUTION:
Only visit trusted sites when running with the "-backend" or "-dump"
options.
PROVIDED AND/OR DISCOVERED BY:
Reported by an anonymous person.
ORIGINAL ADVISORY:
http://sourceforge.net/tracker/index.php?func=detail&aid=1612792&group_id=39518&atid=425439
About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.
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