Vulnerability identifier: #VU14904

Vulnerability risk: High

CVSSv3.1: 9.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2015-3306

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: Yes

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

Vendor: ProFTPD

Description

The vulnerability allows a remote attacker to read and write files to the system.

The vulnerability exists due to improper access restrictions when handling CPFR and SITE CPTO FTP commends. A remote unauthenticated attacker can read and write arbitrary files on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ProFTPD: 1.3.5

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External links
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157053.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157054.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157581.html
http://lists.opensuse.org/opensuse-updates/2015-06/msg00020.html
http://packetstormsecurity.com/files/131505/ProFTPd-1.3.5-File-Copy.html
http://packetstormsecurity.com/files/131555/ProFTPd-1.3.5-Remote-Command-Execution.html
http://packetstormsecurity.com/files/131567/ProFTPd-CPFR-CPTO-Proof-Of-Concept.html
http://packetstormsecurity.com/files/132218/ProFTPD-1.3.5-Mod_Copy-Command-Execution.html
http://www.debian.org/security/2015/dsa-3263
http://www.rapid7.com/db/modules/exploit/unix/ftp/proftpd_modcopy_exec
http://www.securityfocus.com/bid/74238
http://www.exploit-db.com/exploits/36742/
http://www.exploit-db.com/exploits/36803/

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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, a fully functional exploit for this vulnerability is available.