CVE-2020-12390

Incorrect origin serialization of URLs with IPv6 addresses could lead to incorrect security checks. This vulnerability affects Firefox < 76.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Potential Mitigations

• Make fields transient to protect them from deserialization.
• An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/586.html

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1141959
• https://www.mozilla.org/security/advisories/mfsa2020-16/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1141959
• https://www.mozilla.org/security/advisories/mfsa2020-16/