#VU46671 NULL pointer dereference in ProFTPD

Vulnerability identifier: #VU46671

Vulnerability risk: Medium

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: N/A

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ProFTPD
Server applications / File servers (FTP/HTTP)

Vendor: ProFTPD

Description

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

The vulnerability exists due to a NULL pointer dereference error when processing SCP connection request. A remote non-authenticated attacker can try to initiate SCP connection, trigger NULL pointer dereference error and crash ProFTPd daemon.

Example:

ssh user@server scp

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ProFTPD: 1.3.0a - 1.3.7

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External links
https://github.com/proftpd/proftpd/issues/1043

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.