Parse Server before 8.6.110 and 9.0.0 before 9.10.6-alpha.2 Denial of Service via afterSave Pointer Update

Summary

Parse Server before 8.6.110 and 9.0.0 before 9.10.6-alpha.2 fails to contain a serialization error when an object update uses a dot notation key targeting a pointer field's object identifier on a class with an afterSave trigger. Attackers, including unauthenticated clients when objects are writable without a session, can send such an update to crash the Node process.

Remediation

1. Inventory every parse-community parse-server deployment, including staging.
2. Upgrade parse-community parse-server to the fixed version for your release line, listed under Affected versions.
3. Confirm the running version after the upgrade.

References

• Patchhttps://github.com/parse-community/parse-server/pull/10802
• Patchhttps://github.com/parse-community/parse-server/pull/10803
• Advisoryhttps://github.com/parse-community/parse-server/security/advisories/GHSA-wc3c-6843-q7mv
• Advisoryhttps://www.vulncheck.com/advisories/parse-server-before-8.6.110-and-9.0.0-before-9.10.6-alpha.2-denial-of-service-via-aftersave-pointer-update