Short Name |
FTP:EXPLOIT:ILLEGAL-PORT |
---|---|
Severity |
Major |
Recommended |
No |
Category |
FTP |
Release Date |
2003/04/22 |
Update Number |
1213 |
Supported Platforms |
di-5.3+, idp-4.0+, isg-3.0+, j-series-9.5+, mx-11.4+, srx-12.1+, srx-branch-12.1+, vmx-17.4+, vsrx-12.1+, vsrx3bsd-18.2+ |
This protocol anomaly triggers when it detects an FTP PORT command/response to a PASV command ("227...") that specifies a reserved port number. This can indicate an attempt to make IDP or firewall open reserved ports.
PASV commands specifying a reserved port may be the result of misconfigured, or badly implemented, FTP clients. It could also indicate that an attacker is attempting an FTP Bounce Attack, or similar.