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Bug #17006

open

Potential XSS via rule descriptions in the Suricata Blocks page

Added by Jim Pingle 3 days ago. Updated 2 days ago.

Status:
Feedback
Priority:
Normal
Assignee:
Jim Pingle
Category:
Suricata
Target version:
-
Start date:
Due date:
% Done:

100%

Estimated time:
Plus Target Version:
Affected Version:
Affected Plus Version:
Affected Architecture:

Description

The Suricata Blocks page at suricata_blocked.php does not encode rule descriptions or other block data before display.

The rule descriptions can be supplied by custom rules or untrusted external sources which could contain a problematic payload potentially leading to XSS.

For example:

alert icmp any any -> any any (msg:"xss<img src=x onerror=alert(String.fromCharCode(88,83,83))>"; itype:8; sid:990064640; rev:1;)

If the attacker then sends traffic matching the rule while Suricata is set to block, then the next admin to view the Blocks page would trigger an XSS.

Reported by: @lujiefsi

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