DNS-rebinding attack in GUPnP

Published: 2021-06-10
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-33516
Exploitation vector Network
Public exploit N/A
Vulnerable software

Vendor Gnome Development Team

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Reliance on Reverse DNS Resolution for a Security-Critical Action

Risk: Medium

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

CVE-ID: CVE-2021-33516

CWE-ID: CWE-350 - Reliance on Reverse DNS Resolution for a Security-Critical Action

Exploit availability: No


The vulnerability allows a remote attacker to perform DNS rebinding attacks.

The vulnerability exists due to a logic issue in GUPnP. A remote attacker can trick a victim's browser into triggering actions against local UPnP services implemented using this library and gain access to sensitive information (e.g. data exfiltration) or tamper with data.


Install updates from vendor's website.

Vulnerable software versions

gupnp: 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.1.0, 1.1.1, 1.1.2, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4

CPE External links


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.