Vulnerability identifier: #VU24493

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-6638

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Grin
Web applications / Modules and components for CMS

Vendor: mimblewimble

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when following a question in the dev/crypto gitter channel. A remote attacker can cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Grin: 0.4.0 - 2.1.1

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External links
http://github.com/mimblewimble/grin/compare/v2.1.1...v3.0.0
http://github.com/mimblewimble/grin-security/blob/master/CVEs/CVE-2020-6638.md

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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.