jackson-databind: Case-insensitive deserialization bypasses per-property @JsonIgnoreProperties
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2.18.9, 2.21.5, 3.1.4, 2.22.1
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- 1 proof of concept on GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.8.0 until 2.18.9, 2.21.5, and 3.1.4, in BeanDeserializerBase.createContextual(), per-property @JsonIgnoreProperties exclusions are applied by _handleByNameInclusion(), producing a contextual deserializer whose BeanPropertyMap has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by @JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES)) rebuilds from this._beanProperties (the original, unfiltered map) instead of contextual._beanProperties, then overwrites the filtered map — restoring every property _handleByNameInclusion had just removed. The ignored property becomes writable again. This vulnerability is fixed in 2.18.9, 2.21.5, and 3.1.4.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- FasterXML jackson-databind
From 2.8.0 · fixed in 2.18.9; From 2.19.0 · fixed in 2.21.5; From 3.1.0 · fixed in 3.1.4
- com.fasterxml.jackson.core:jackson-databindMaven
From 3.1.0 · fixed in 3.1.4
- tools.jackson.core:jackson-databindMaven
From 3.1.0 · fixed in 3.1.4
- com.fasterxml.jackson.core:jackson-databindMaven
From 2.8.0 · fixed in 2.18.9
- com.fasterxml.jackson.core:jackson-databindMaven
From 2.19.0 · fixed in 2.21.5
- com.fasterxml.jackson.core:jackson-databindMaven
From 2.22.0 · fixed in 2.22.1