#VU21750 Input validation error in jackson-databind


Published: 2019-10-13 | Updated: 2020-01-30

Vulnerability identifier: #VU21750

Vulnerability risk: Medium

CVSSv3.1:

CVE-ID: CVE-2019-17531

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
jackson-databind
Universal components / Libraries / Libraries used by multiple products

Vendor: FasterXML

Description

The vulnerability allows a remote attacker to compromise the affected software.

The vulnerability exists due to a Polymorphic Typing in jackson-databind when processing JSON requests. A remote attacker can send specially crafted JSON data to JNDI service and execute a malicious payload.

Successful exploitation of the vulnerability requires that Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has the apache-log4j-extra (version 1.2.x) jar in the classpath.

Mitigation
Install update from vendor's website.

Vulnerable software versions

jackson-databind: 2.9.0 - 2.9.10, 2.6.7 - 2.6.7.2


CPE

External links
http://github.com/FasterXML/jackson-databind/issues/2498
http://medium.com/@cowtowncoder/on-jackson-cves-dont-panic-here-is-what-you-need-to-know-54cd0d6e8062


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


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