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Bug #3783

Stack overflow in DetectFlowbitsAnalyze

Added by Antti Tönkyrä 11 months ago. Updated 10 months ago.

Status:
Closed
Priority:
Normal
Target version:
Affected Versions:
Effort:
Difficulty:
Label:
Needs backport to 5.0

Description

When doing torture tests, I discovered a stack overflow in DetectFlowbitsAnalyze. I have made a PR to github @ https://github.com/OISF/suricata/pull/5103

Overflow happens when number of flowbits is sufficiently large which in turn causes array containing FBAnalyze structs to be greater than stack size.

Changeset should apply cleanly to 5.x too.


Related issues

Copied to Bug #3790: Stack overflow in DetectFlowbitsAnalyzeClosedJeff LucovskyActions

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