Vulnerability identifier: #VU63861

Vulnerability risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3761

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
cfrpki
Server applications / Other server solutions

Vendor: Cloudflare

Description

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

The vulnerability exists due to a boundary error when processing untrusted input. A remote attacker can disable RPKI Origin Validation in a victim network to perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

cfrpki: 1.0.0 - 1.2.2

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External links
http://github.com/cloudflare/cfrpki/security/advisories/GHSA-c8xp-8mf3-62h9
http://www.debian.org/security/2022/dsa-5041

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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.