Overview
Recently, a security researcher discovered a vulnerability (CVE-2019-12384) in jackson-databind, noting that when certain conditions are met, an attacker, via a malicious request, could bypass the blacklist restriction and remotely execute code in an affected server during deserialization.
Reference:
https://blog.doyensec.com/2019/07/22/jackson-gadgets.html
NSFOCUS’s Alert Level: [Blue]
For the definition of NSFOCUS’s alert levels, see “Description of NSFOCUS’s Security Alert Levels.”
Affected Versions
- jackson-databind 2.x <= 2.9.9
Unaffected Versions
- jackson-databind 2.9.9.1
Solutions
The vendor has fixed this vulnerability in jackson-databind V2.9.9.1 and users are advised to upgrade as soon as possible.
Besides, users can disable enableDefaultTyping for temporary protection.
Reference:
https://github.com/FasterXML/jackson-databind/releases
Description of NSFOCUS’s Security Alert Levels
| Level | Description | Delivery of Technical Analysis Result | Availability of Detection & Protection Rule Update |
| Red | The vulnerability has an extensive and damaging impact, and is easy to exploit. | Within 12 hours | Within 16 hours |
| Orange | The vulnerability has a comparatively extensive and damaging impact, and is comparatively easy to exploit. | Within 12 hours | Within 16 hours |
| Yellow | The vulnerability has a controllable impact within a controllable scope, and is difficult to exploit. | Within 12 hours | Within 16 hours |
| Blue | The vulnerability has a minor impact within a small scope, and is very difficult to exploit. | – | On a weekly routine |
Statement
This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.
About NSFOCUS
NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks. The company’s Intelligent Hybrid Security strategy utilizes both cloud and on-premises security platforms, built on a foundation of real-time global threat intelligence, to provide multi-layered, unified and dynamic protection against advanced cyber attacks.
NSFOCUS works with Fortune Global 500 companies, including four of the world’s five largest financial institutions, organizations in insurance, retail, healthcare, critical infrastructure industries as well as government agencies. NSFOCUS has technology and channel partners in more than 60 countries, is a member of both the Microsoft Active Protections Program (MAPP), and the Cloud Security Alliance (CSA).
A wholly owned subsidiary of NSFOCUS Information Technology Co. Ltd., the company has operations in the Americas, Europe, the Middle East and Asia Pacific.
