jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databinds PolymorphicTypeValidator (PTV) is the primary safety mechanism guarding polymorphic deserialization. When polymorphic typing is enabled and a type identifier contains generic parameters (i.e. the type ID string contains <), DatabindContext._resolveAndValidateGeneric() validates only the raw container class name (the substring before <) against the configured PTV. If the container type is approved, the method parses the full canonical type string via TypeFactory.constructFromCanonical() and returns the fully parameterized type without ever validating the nested type arguments against the PTV. The nested type arguments are then resolved, instantiated, and populated as beans during deserialization. An attacker who controls the type ID can therefore place a denied class as a generic type parameter of an allowed container — for example java.util.ArrayList<com.evil.Gadget> when only java.util.ArrayList is allow-listed. The container passes the PTV check; com.evil.Gadget is loaded via Class.forName(name, true, loader), instantiated, and its properties are set from attacker-controlled JSON. This completely bypasses an explicitly configured PTV allow-list. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
Weakness
The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Jackson-databind | Fasterxml | 2.10.0 (including) | 2.18.8 (excluding) |
| Jackson-databind | Fasterxml | 2.19.0 (including) | 2.21.4 (excluding) |
| Jackson-databind | Fasterxml | 3.0.0 (including) | 3.1.4 (excluding) |
| Cryostat 4 on RHEL 9 | RedHat | cryostat/cryostat-reports-rhel9:4.2.0-13 | * |
| Cryostat 4 on RHEL 9 | RedHat | cryostat/cryostat-rhel9:4.2.0-13 | * |
| Cryostat 4 on RHEL 9 | RedHat | cryostat/jfr-datasource-rhel9:4.2.0-13 | * |
| Red Hat Build of Apache Camel 4.18 for Quarkus 3.33 | RedHat | jackson-databind | * |
| Red Hat Certificate System 10.8 for RHEL-8 | RedHat | redhat-pki:10-8100020260728001635.f9354743 | * |
| Red Hat Data Grid 8.6.2 | RedHat | jackson-databind | * |
| Red Hat Enterprise Linux 10 | RedHat | dogtag-pki-0:11.9.0-4.el10_2 | * |
| Red Hat Enterprise Linux 10.0 Extended Update Support | RedHat | dogtag-pki-0:11.6.0-2.el10_0 | * |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | RedHat | pki-deps:10.6-8040020260720064222.522a0ee4 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | RedHat | pki-deps:10.6-8040020260720064222.522a0ee4 | * |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | RedHat | pki-deps:10.6-8060020260720025549.ad008a3a | * |
| Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | RedHat | pki-deps:10.6-8060020260720025549.ad008a3a | * |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service | RedHat | pki-deps:10.6-8080020260714161755.63b34585 | * |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | RedHat | pki-deps:10.6-8080020260714161755.63b34585 | * |
| Red Hat Enterprise Linux 9 | RedHat | jackson-databind-0:2.21.4-1.el9_8 | * |
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | RedHat | jackson-databind-0:2.21.4-1.el9_2 | * |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | RedHat | jackson-databind-0:2.21.4-1.el9_4 | * |
| Red Hat Enterprise Linux 9.6 Extended Update Support | RedHat | jackson-databind-0:2.21.4-1.el9_6 | * |
| Red Hat OpenShift Dev Spaces 3.29 | RedHat | devspaces/server-rhel9:1784887425 | * |
| Jackson-databind | Ubuntu | questing | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/120.html
- https://cwe.mitre.org/data/definitions/15.html
- https://cwe.mitre.org/data/definitions/182.html
- https://cwe.mitre.org/data/definitions/3.html
- https://cwe.mitre.org/data/definitions/43.html
- https://cwe.mitre.org/data/definitions/6.html
- https://cwe.mitre.org/data/definitions/71.html
- https://cwe.mitre.org/data/definitions/73.html
- https://cwe.mitre.org/data/definitions/85.html
References
- https://github.com/FasterXML/jackson-databind/commit/434d6c511de7fdd9872f29157aafb6162d12d8d5
- https://github.com/FasterXML/jackson-databind/issues/5988
- https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-j3rv-43j4-c7qm
- https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-j3rv-43j4-c7qm