FileZilla Server Null Pointer Dereference Multiple Denial of Service Vulnerabilities

BID:21549

Info

FileZilla Server Null Pointer Dereference Multiple Denial of Service Vulnerabilities

Bugtraq ID: 21549
Class: Failure to Handle Exceptional Conditions
CVE:
Remote: Yes
Local: No
Published: Dec 11 2006 12:00AM
Updated: Dec 11 2006 12:00AM
Credit: shinnai is credited with the discovery of these vulnerabilities.
Vulnerable: FileZilla FileZilla Server 0.9.21
FileZilla FileZilla Server 0.9.19
FileZilla FileZilla Server 0.9.17
FileZilla FileZilla Server 0.9.16 b
FileZilla FileZilla Server 0.9.9
FileZilla FileZilla Server 0.9.8 c
FileZilla FileZilla Server 0.9.8 b
FileZilla FileZilla Server 0.9.8 a
FileZilla FileZilla Server 0.9.8
FileZilla FileZilla Server 0.7.1
FileZilla FileZilla Server 0.7
FileZilla FileZilla Server 0.9.6
FileZilla FileZilla Server 0.9.5
FileZilla FileZilla Server 0.9.4e
FileZilla FileZilla Server 0.9.4d
FileZilla FileZilla Server 0.9.3
FileZilla FileZilla Server 0.9.20
FileZilla FileZilla Server 0.9.2
FileZilla FileZilla Server 0.9.1b
FileZilla FileZilla Server 0.9.0
FileZilla FileZilla Server 0.8.9
FileZilla FileZilla Server 0.8.8
FileZilla FileZilla Server 0.8.7
FileZilla FileZilla Server 0.8.6a
FileZilla FileZilla Server 0.8.5
FileZilla FileZilla Server 0.8.4
FileZilla FileZilla Server 0.8.3
FileZilla FileZilla Server 0.8.2
FileZilla FileZilla Server 0.8.1
Not Vulnerable: FileZilla FileZilla Server 0.9.22

Discussion

FileZilla Server Null Pointer Dereference Multiple Denial of Service Vulnerabilities

FileZilla server is prone to multiple denial-of-service vulnerabilities because it fails to handle exceptional conditions.

An attacker can exploit these issues to crash the affected application, denying service to legitimate users.

Versions prior to 0.9.22 are vulnerable to these issues.

Exploit / POC

FileZilla Server Null Pointer Dereference Multiple Denial of Service Vulnerabilities

An attacker can use standard network utilities to exploit these issues.

Solution / Fix

FileZilla Server Null Pointer Dereference Multiple Denial of Service Vulnerabilities

Solution:
The vendor has released an update to address these issues. Please see the references for more information.

References

FileZilla Server Null Pointer Dereference Multiple Denial of Service Vulnerabilities

References:
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