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AdSubtract Unauthorised Proxy Access
Secunia Advisory: SA8950
Release Date: 2003-06-05
Popularity: 5,279 views

Critical:
Less critical
Impact: Security Bypass
Where: From remote
Solution Status: Unpatched

Software:AdSubtract 2.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

Description:
A vulnerability has been identified in AdSubtract allowing malicious people to use the proxy functionality of AdSubtract.

The problem is that AdSubtract by default listens on 4444/tcp and 11523/tcp on all interfaces, by default AdSubtract also filters access so that only requests from 127.0.0.1 are allowed. However, this security mechanism is flawed, anyone who can alter the PTR DNS record for hes IP address so that the hostname becomes "127.0.0.1.somedomain" can fool the "security" check.

This could be exploited by malicious people to perform arbitrary connections from hosts running AdSubtract. This includes SMTP connections allowing unauthorised mail relaying.

Change Page:
[ 1 ] [ 2 ] [ 3 ]



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