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Bug #7296

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detect: transform base64 creates a 0-sized variable-length array

Bug #7296: detect: transform base64 creates a 0-sized variable-length array

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

Status:
Closed
Priority:
Normal
Assignee:
Philippe Antoine
Target version:
8.0.0-beta1
Affected Versions:
Effort:
Difficulty:
Label:

Description

Found by oss-fuzz
https://issues.oss-fuzz.com/u/1/issues/370595554

No need to backport as detect-transform-base64.c does not exist in main7

Related issues 1 (0 open — 1 closed)

Copied from Suricata - Bug #5521: detect: transform strip whitespace creates a 0-sized variable-length arrayClosedPhilippe AntoineActions

PA Updated by Philippe Antoine over 1 year ago Actions
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 #1

  • Copied from Bug #5521: detect: transform strip whitespace creates a 0-sized variable-length array added

PA Updated by Philippe Antoine over 1 year ago Actions
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 #2

  • Status changed from New to In Review

VJ Updated by Victor Julien over 1 year ago Actions
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 #3

  • Label deleted (Needs backport to 6.0)

What is the impact of this?

PA Updated by Philippe Antoine over 1 year ago Actions
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 #4

Victor Julien wrote in #note-3:

What is the impact of this?

Undefined behavior cf https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html

-fsanitize=vla-bound: A variable-length array whose bound does not evaluate to a positive value.

I do not think there is a real impact

VJ Updated by Victor Julien over 1 year ago Actions
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 #5

How do we end up with a 0 byte input btw?

VJ Updated by Victor Julien over 1 year ago Actions
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 #6

  • Private changed from Yes to No

PA Updated by Philippe Antoine over 1 year ago Actions
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 #7

Victor Julien wrote in #note-5:

How do we end up with a 0 byte input btw?

Looks easy, like a http header with an empty value : 0 byte input

PA Updated by Philippe Antoine over 1 year ago Actions
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 #9

  • Status changed from In Review to Closed
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