VulnerabilityModified

CVE-2021-33516

It allows DNS rebinding.

HIGH 8.1EPSS 1.08%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.08%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

An issue was discovered in GUPnP before 1.0.7 and 1.1.x and 1.2.x before 1.2.5. It allows DNS rebinding. A remote web server can exploit this vulnerability to trick a victim's browser into triggering actions against local UPnP services implemented using this library. Depending on the affected service, this could be used for data exfiltration, data tempering, etc.

CVSS 3.1: 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS: 1.08% probability · 63th percentile
CISA KEV: Not listed
Affected: gnome/gupnp
Source: cve@mitre.org

References

https://discourse.gnome.org/t/security-relevant-releases-for-gupnp-issue-cve-2021-33516/6536Patch, Vendor Advisory
https://gitlab.gnome.org/GNOME/gupnp/-/issues/24Issue Tracking, Vendor Advisory
https://discourse.gnome.org/t/security-relevant-releases-for-gupnp-issue-cve-2021-33516/6536Patch, Vendor Advisory
https://gitlab.gnome.org/GNOME/gupnp/-/issues/24Issue Tracking, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.