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.
NSFOCUS’s Alert Level: [Blue]
For the definition of NSFOCUS’s alert levels, see “Description of NSFOCUS’s Security Alert Levels.”
- jackson-databind 2.x <= 2.9.9
- jackson-databind 126.96.36.199
The vendor has fixed this vulnerability in jackson-databind V188.8.131.52 and users are advised to upgrade as soon as possible.
Besides, users can disable enableDefaultTyping for temporary protection.
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|
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.
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