#VU28948 Input validation error in Universal Plug and Play (UPnP) - CVE-2020-12695

Vulnerability identifier: #VU28948

Vulnerability risk: Medium

CVSSv4.0: 7.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2020-12695

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Universal Plug and Play (UPnP)
Other software / Other software solutions

Vendor: Open Connectivity Foundation

Description

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

The vulnerability exists due to a CallStranger issue in the UPnP SUBSCRIBE functionality. A remote attacker can send traffic to arbitrary destinations, leading to amplified DDoS attacks and data exfiltration.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Universal Plug and Play (UPnP): before 2020-04-17

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External links
https://www.openwall.com/lists/oss-security/2020/06/08/2
https://github.com/yunuscadirci/CallStranger
https://www.callstranger.com
https://www.kb.cert.org/vuls/id/339275
https://www.tenable.com/blog/cve-2020-12695-callstranger-vulnerability-in-universal-plug-and-play-upnp-puts-billions-of

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