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GHSA-2m6g-crv8-p3c6

HighCVSS 8.6 / 10
Published Sep 16, 2022·Last modified Dec 6, 2023
Affected Components(0)

No affected components available

Description

Impact

Internal fields (keys used internally by Parse Server, prefixed by _) and protected fields (user defined) can be used as query constraints. Internal and protected fields are removed by Parse Server from query results and are only returned to the client using a valid master key. However, using query constraints, these fields can be guessed by enumerating until Parse Server returns a response object.

Patches

The patch requires the master key to use internal and protected fields as query constraints.

Workarounds

Implement a Parse Cloud Trigger beforeFind and manually remove the query constraints, such as:

Parse.Cloud.beforeFind('TestObject', ({ query }) => {
  for (const key in query._where || []) {
    // Repeat logic for protected fields
    if (key.charAt(0) === '_') {
      delete query._where[key];
    }
  }
});

References

  • https://github.com/parse-community/parse-server/security/advisories/GHSA-2m6g-crv8-p3c6
Risk Scores
Base Score
8.6

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information.

Threat Intelligence
7.9

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
1.00%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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