Denial of service in ProFTPD



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-18217
CWE-ID CWE-835
Exploitation vector Network
Public exploit N/A
Vulnerable software
 ProFTPD
Server applications / File servers (FTP/HTTP)

Vendor ProFTPD

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Infinite loop

EUVDB-ID: #VU22564

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-18217

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in main.c in a child process when handling overly long commands. A remote non-authenticated attacker can perform a denial of service attack by sending an overly log command to the affected FTP server.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ProFTPD: 1.3.0 - 1.3.6a

CPE2.3 External links

https://github.com/proftpd/proftpd/blob/1.3.6/NEWS
https://github.com/proftpd/proftpd/blob/1.3.6/RELEASE_NOTES
https://github.com/proftpd/proftpd/blob/master/NEWS
https://github.com/proftpd/proftpd/blob/master/RELEASE_NOTES
https://github.com/proftpd/proftpd/issues/846


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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