7.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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GHSA-6g7g-w4f8-9c9x

GHSA-6g7g-w4f8-9c9x: Denial of service in github.com/buger/jsonparser

The Delete function fails to properly validate offsets when processing malformed JSON input. This can lead to a negative slice index and a runtime panic, allowing a denial of service attack.

(GitHub Advisory)

Miggo Vulnerability Database

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GHSA-6g7g-w4f8-9c9x

GHSA-6g7g-w4f8-9c9x:

7.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
github.com/buger/jsonparser	go	<= 1.1.1

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability exists in the Delete function of the github.com/buger/jsonparser library. The function is designed to remove a key-value pair from a JSON byte slice. However, it does not correctly handle malformed JSON inputs. The analysis of the issue description and the linked blog post reveals that a crafted input can cause the internal offset calculations to yield a negative number. This negative offset is then used to slice the input data, which is an invalid operation in Go and causes a runtime panic. The panic crashes the application, leading to a denial of service. The vulnerable function is clearly identified as Delete in parser.go. Since there is no patch, the analysis is based on the description of the vulnerability and the code of the vulnerable version.

Vulnerable functions

Delete

parser.go

The `Delete` function in `parser.go` is vulnerable to a denial of service attack. When processing a malformed JSON input like `\"0\":\"0\":`, the function calculates a negative offset. This negative offset is then used in a slice operation, which causes a runtime panic due to a slice bounds out of range error. This can be exploited by an unauthenticated attacker to crash the service.

Vulnerability Intelligence
Miggo AI

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WAF Protection Rules

WAF Rule

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Reasoning

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