Signature Detail
Short Name |
SMTP:REQERR:REQ-SYNTAX-ERROR |
|---|---|
Severity |
Medium |
Recommended |
No |
Category |
SMTP |
Release Date |
2003/08/27 |
Update Number |
1213 |
Supported Platforms |
di-5.3+, idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+ |
SMTP: Request Error Syntax Error
This protocol anomaly triggers when it detects an unparsed SMTP command line or header line due to a missing ":," to a missing or invalid 3-digit code, or to a missing test after ":." This can indicate a non-standard e-mail client or server or a backdoor/exploit attempt.
Extended Description
Receiving such an SMTP command could indicate a non-standard SMTP implementation or that an attacker is attempting to inject malformed packets into the network.
References