Red Hat Enterprise Linux 7 update for gupnp

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

EUVDB-ID: #VU54033

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]

CVE-ID: CVE-2021-33516

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

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux for Power, little endian: 7

Red Hat Enterprise Linux for Power, big endian: 7

Red Hat Enterprise Linux for IBM z Systems: 7

Red Hat Enterprise Linux for Scientific Computing: 7

Red Hat Enterprise Linux Desktop: 7

Red Hat Enterprise Linux Workstation: 7

Red Hat Enterprise Linux Server: 7

gupnp (Red Hat package): before 1.0.2-6.el7_9

External links

http://access.redhat.com/errata/RHSA-2021:2417

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.