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
Short Name
SMTP:REQERR:REQ-SYNTAX-ERROR
Severity
Minor
Recommended
False
Recommended Action
None
Category
SMTP
Release Date
08/27/2003
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3324
False Positive
Unknown