Bug #6222: Decode-events of IPv6 GRE are not triggered - Suricata - Open Information Security Foundation

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Bug #6222

closed

Decode-events of IPv6 GRE are not triggered

Added by Cole Dishington 10 months ago. Updated 9 months ago.

Status:

Closed

Priority:

Normal

Assignee:

Cole Dishington

Target version:

7.0.1

Affected Versions:

7.0.0, 7.0.1

Effort:

low

Difficulty:

low

Label:

Description

Detection of decode-events of IPv6 GRE packets are not triggered if the GRE decoding fails. I have attached a pcap, that I used for the suricata-verify test, containing IPv4 and IPv6 packets that specify a proto GRE but with a partial GRE payload.
The following rule will be tiggered for GRE over IPv6 but not for GRE over IPv6.

alert ip any any -> any any (msg:"GRE packet too small"; decode-event:gre.pkt_too_small; sid:3;)

Files

test.pcap (516 Bytes) test.pcap

Cole Dishington, 07/19/2023 10:21 PM

Subtasks 1 (0 open — 1 closed)