3proxy ftpprchild function denial of service

3proxy-ftpprchild-dos (37401)

Low Risk

Description:

3proxy is vulnerable to a denial of service, caused by an error in the FTP proxy module ftpprchild() function. By sending multiple OPEN commands, a remote attacker could cause the service to crash.

*CVSS:

Base Score:	5
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial
Temporal Score:	3.9
Exploitability:	Proof-of-Concept
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of 3proxy (0.5.3j or later), available from the 3proxy Web site. See References.

For other distributions:
Apply the appropriate update for your system. See References.

References:

• 3proxy Web site: 3proxy.
• Full-Disclosure Mailing List, Tue Oct 23 2007 - 10:38:57 CDT: 3proxy double free vulnerability.
• BID-26180: 3proxy FTP Proxy Double Free Memory Corruption Vulnerability
• CVE-2007-5622: Double free vulnerability in the ftpprchild function in ftppr in 3proxy 0.5 through 0.5.3i allows remote attackers to cause a denial of service (daemon crash) via multiple OPEN commands to the FTP proxy.
• GLSA-200711-13: 3proxy: Denial of Service
• SA27353: 3proxy FTP Proxy Module "OPEN" Command Double-Free Vulnerability

Platforms Affected:

• Gentoo Linux
• Vladimir Dubrovin 3proxy prior to 0.5.3j

Reported:

Oct 23, 2007

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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