Bug #5034: dns: probing/parser can return error when it should return incomplete - Suricata - Open Information Security Foundation

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Bug #5034

closed

dns: probing/parser can return error when it should return incomplete

Added by Jason Ish almost 3 years ago. Updated about 2 years ago.

Status:

Closed

Priority:

Normal

Assignee:

Jason Ish

Target version:

7.0.0-beta1

Affected Versions:

Effort:

Difficulty:

Label:

Description

The hostname parsing in the DNS parser will return an error when it runs out of data instead of incomplete. This can result in a specially crafted DNS payload not being detected as DNS.

Suricata-Verify test showing DNS stream being picked up as ENIP:
https://github.com/OISF/suricata-verify/pull/676

Fix with master (nom7) is trivially done by moving error handling to the question mark operator. Its likely the same is true for 5.0.x and 6.0.x. This will probably ripple up incomplete or error up the parse chain.

Related issues 2 (0 open — 2 closed)