CVE-2020-10675: Infinite Loop in jsonparser

Background

The buger jsonparser library is a Go package that provides a fast and efficient way to parse JSON data. It is commonly used in Go applications to handle JSON parsing and manipulation. The library allows developers to extract values from JSON objects and arrays using a simple API. However, a vulnerability has been discovered in the library that can lead to a denial of service (infinite loop) when a specific Delete call is made.

Vulnerability Detail

The vulnerability in buger jsonparser (versions prior to 1.0.0) allows attackers to trigger an infinite loop by making a Delete call. This can result in a denial of service, causing the affected application to become unresponsive or crash. The issue arises due to improper handling of certain inputs during the Delete operation. Attackers can exploit this vulnerability by crafting malicious JSON payloads and sending them to the application. The impact of this vulnerability can be severe, as it can lead to service disruption and potential downtime.

go get github.com/buger/jsonparser@v1.6.1

go get github.com/buger/jsonparser@v1.0.0

Workaround

As a workaround, developers can implement input validation and sanitization mechanisms to mitigate the risk of exploitation. By carefully validating and sanitizing JSON inputs before passing them to the jsonparser library, developers can prevent malicious inputs from triggering the infinite loop. This can be achieved by using appropriate JSON validation libraries or implementing custom validation logic. Here is an example of how input validation can be performed using the encoding/json package in Go:

import (
    "encoding/json"
    "log"
)

func validateJSON(input []byte) error {
    var data interface{}
    if err := json.Unmarshal(input, &data); err != nil {
        log.Println("Invalid JSON input: ", err)
        return err
    }
    // Perform additional validation checks
    // ...
    return nil
}

Conclusion

The vulnerability in buger jsonparser can lead to a denial of service (infinite loop) in applications that use the library. To mitigate the risk, developers should update their applications to use buger jsonparser version 1.0.0 or later. Additionally, implementing input validation and sanitization mechanisms can help prevent the exploitation of this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

See every vulnerability recorded for github.com/buger/jsonparser →

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