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Security #5926

closed

http2: evasion by splitting header fields over frames

Added by Philippe Antoine about 1 year ago. Updated 2 months ago.

Status:
Closed
Priority:
Normal
Assignee:
Philippe Antoine
Target version:
8.0.0-beta1
Affected Versions:
Label:
CVE:
2024-24568
Git IDs:

aff54f29f8c3f583ae0524a661aa90dc7a2d3f92

Severity:
HIGH
Disclosure Date:

Description

Beginning in a headers frame, and continuing in so-called continuation frames, with reassembly needed to be done...

Then, we need to avoid quadratic complexity of Huffman decoding as golang CVE 2023-1571

Files

cont.pcap (2.53 KB) cont.pcap Philippe Antoine, 12/19/2023 08:33 PM

Subtasks 2 (0 open — 2 closed)

Security #6717: http2: evasion by splitting header fields over frames (7.0.x backport)ClosedPhilippe AntoineActions
Security #6751: http2: evasion by splitting header fields over frames (6.0.x backport)ClosedPhilippe AntoineActions
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 #1

Updated by Philippe Antoine 10 months ago

  • Target version changed from TBD to 8.0.0-beta1
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 #2

Updated by Philippe Antoine 5 months ago

  • Priority changed from Normal to Low
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 #3

Updated by Philippe Antoine 4 months ago

Attaching a sample pcap

There should be no anomaly and we should have the request header namenamenamenamenamenamenamenamenamename: valuevaluevaluevaluevaluevaluevaluevaluevaluevaluevaluevaluevaluevaluevaluevaluevaluevaluevaluevalue

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 #4

Updated by Philippe Antoine 3 months ago

  • Tracker changed from Bug to Security
  • Severity set to MODERATE

Evasion is a security issue, right ? Which severity ?
An attacker can hide its HTTP2 headers to Suricata now...

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 #5

Updated by Philippe Antoine 3 months ago

  • Priority changed from Low to Normal
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 #6

Updated by Philippe Antoine 3 months ago

  • Status changed from New to In Review

Gitlab MR

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 #7

Updated by Jason Ish 3 months ago

Philippe: Are backports required?

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 #8

Updated by Philippe Antoine 3 months ago

Jason Ish wrote in #note-7:

Philippe: Are backports required?

I guess so.

That depends if this is assessed a security issue versus an evasion or a feature...

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 #9

Updated by Victor Julien 3 months ago

  • Label Needs backport to 7.0 added
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 #10

Updated by OISF Ticketbot 3 months ago

  • Subtask #6717 added
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 #11

Updated by OISF Ticketbot 3 months ago

  • Label deleted (Needs backport to 7.0)
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 #12

Updated by Jason Ish 3 months ago

  • Label Needs backport to 6.0 added
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 #13

Updated by OISF Ticketbot 3 months ago

  • Subtask #6751 added
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 #14

Updated by OISF Ticketbot 3 months ago

  • Label deleted (Needs backport to 6.0)
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 #15

Updated by Victor Julien 3 months ago

  • CVE set to 2024-24568
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 #16

Updated by Philippe Antoine 3 months ago

  • Status changed from In Review to Closed
  • Git IDs updated (diff)
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 #17

Updated by Philippe Antoine 3 months ago

  • Severity changed from MODERATE to HIGH

not critical because does not fit

evasions with a wide scope are considered to be in-scope

But High as Tier 1

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 #18

Updated by Victor Julien 2 months ago

  • Private changed from Yes to No
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