Vulnerability identifier: #VU23397

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Fastjson
Web applications / JS libraries

Vendor: Oschina

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a specially crafted JSON data packets and execute arbitrary code on the target Fastjson server.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Fastjson: All versions

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External links
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191204-01-fastjson-en

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.