Description
An issue was discovered in the SFTP Server component in Core FTP 2.0 Build 674. A directory traversal vulnerability exists using the SIZE command along with a \..\..\ substring, allowing an attacker to enumerate file existence based on the returned information.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Core FTP Server FTP / SFTP Server v2 Build 674 - 'SIZE' Directory Traversal EDB-46535 · dos · Mar 13, 2019
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| NuGet | CoreFtp | <= 2.0 | — | GHSA-w393-h95m-f879 |
References
- 107446 vdb-entry
- http://www.coreftp.com/forums/viewtopic.php?f=15&t=4022509
- 46535 exploit
- 20190311 CVE-2019-9648 CoreFTP Server FTP / SFTP Server v2 - Build 674 SIZE Directory Traversal mailing-list
- 20190825 CoreFTP Server FTP / SFTP Server v2 - Build 674 SIZE Directory Traversal (Metasploit) Exploit mailing-list
- http://packetstormsecurity.com/files/154204/CoreFTP-Server-SIZE-Directory-Traversal.html