Remote code execution in JYaml library



Risk High
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2020-8441
CWE-ID CWE-502
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 JYaml
Web applications / JS libraries

Vendor Sean O\'Dell

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Deserialization of Untrusted Data

EUVDB-ID: #VU25590

Risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2020-8441

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

Description

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

The vulnerability exists due to insecure input validation when processing serialized data passed via the "load()" function. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

JYaml: 1.0 - 1.3

CPE2.3 External links

http://gist.github.com/j0lt-github/f5141abcacae63d434ecae211422153a
http://github.com/mbechler/marshalsec
http://github.com/mbechler/marshalsec/blob/master/marshalsec.pdf
http://sourceforge.net/p/jyaml/bugs/


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. However, proof of concept for this vulnerability is available.



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