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Bug #5443

closed

ftp-data: failed assertion

Added by Philippe Antoine over 2 years ago. Updated over 1 year ago.

Status:
Closed
Priority:
Normal
Assignee:
Victor Julien
Target version:
7.0.1
Affected Versions:
Effort:
Difficulty:
Label:

Description

Found by oss-fuzz
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=49010

./src/suricata -k none -c suricata.yaml --set stream.midstream=true --runmode=single -r lol.pcap

Victor, is this assertion really meant to be unreachable ?

Files

lol.pcap (4.13 KB) lol.pcap Philippe Antoine, 07/15/2022 01:46 PM

Related issues 1 (0 open — 1 closed)

Related to Suricata - Bug #5205: FTP-data unrecognized depending on multi-threadingClosedPhilippe AntoineActions
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 #2

Updated by Philippe Antoine over 2 years ago

  • Related to Bug #5205: FTP-data unrecognized depending on multi-threading added
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 #3

Updated by Philippe Antoine over 2 years ago

Took me some time to figure out that I was needing --runmode=single to reproduce due to #5205 (fuzz target runs in single thread and so ftp-data detection goes alright)

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 #4

Updated by Victor Julien over 2 years ago

  • Status changed from New to Assigned
  • Priority changed from Normal to High
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 #5

Updated by Philippe Antoine about 2 years ago

My analysis :
- we have a FTP flow which expects a ftp-data flow
- we use stream.midstream=true
- the ftp-data flow has a first packet with data
- the ftp-data flow has then a second packet in same direction with RST flag (and no ACK flag)
- RST triggers the parse of all available data, even if it has never been acked

Should we process any of these data that has never been acked ?

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 #6

Updated by Victor Julien about 2 years ago

  • Target version changed from 7.0.0-beta1 to 8.0.0-beta1
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 #7

Updated by Philippe Antoine about 2 years ago

Why not 7.0.rc1 ?

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 #8

Updated by Victor Julien about 2 years ago

  • Target version changed from 8.0.0-beta1 to 7.0.0-rc1

Accident during mass retargeting, thanks for catching this.

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 #9

Updated by Philippe Antoine about 2 years ago

I would disable the debug assertion if we cannot have a better fix quickly.
This would allow to have fuzzing going on and we would still have the issue to investigate...

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 #10

Updated by Jeff Lucovsky almost 2 years ago

  • Status changed from Assigned to Closed
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 #11

Updated by Victor Julien almost 2 years ago

  • Private changed from Yes to No
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 #12

Updated by Philippe Antoine almost 2 years ago

  • Status changed from Closed to Assigned

The bug is still there to be fixed, so reopening

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 #14

Updated by Philippe Antoine almost 2 years ago

  • Priority changed from High to Normal
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 #15

Updated by Victor Julien almost 2 years ago

  • Target version changed from 7.0.0-rc1 to 7.0.0-rc2
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 #16

Updated by Victor Julien over 1 year ago

  • Target version changed from 7.0.0-rc2 to 7.0.0
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 #17

Updated by Victor Julien over 1 year ago

  • Priority changed from Normal to High
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 #18

Updated by Victor Julien over 1 year ago

  • Target version changed from 7.0.0 to 7.0.1
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 #19

Updated by Victor Julien over 1 year ago

  • Status changed from Assigned to In Review
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 #20

Updated by Victor Julien over 1 year ago

  • Status changed from In Review to Closed
  • Priority changed from High to Normal

https://github.com/OISF/suricata/pull/9320

Issue was caused by data on RST feeding data to app-layer after EOF was already sent to app-layer. Data on RST tracked in #6244.

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