Remote code execution in json-c



Published: 2020-05-13 | Updated: 2020-07-27
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-12762
CWE-ID CWE-787
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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json-c
Other software / Other software solutions

Vendor json-c

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

Updated 27.07.2020

Added fixed version.

1) Out-of-bounds write

EUVDB-ID: #VU27882

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-12762

CWE-ID: CWE-787 - Out-of-bounds Write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the "printbuf_memappend". A remote attacker can create a specially crafted JSON file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

json-c: 0.10 - 0.14


CPE2.3 External links

http://github.com/json-c/json-c/pull/592

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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