What is CVE-2021-23270?

CVE-2021-23270 is a high-severity vulnerability in Gargoyle-Router Gargoyle, classified under Excessive Iteration. CVSS score: 7.5/10. Published 2021-04-12.

How severe is CVE-2021-23270?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Gargoyle-Router Gargoyle

CVE-2021-23270

In Gargoyle OS 1.12.0, when IPv6 is used, a routing loop can occur that generates excessive network traffic between an affected device and its upstream ISP's router. This occurs when a link prefix route points to a point-to-point link, a destination IPv6 address belongs to the prefix and is not a local IPv6 address, and a router advertisement is received with at least one global unique IPv6 prefix for which the on-link flag is set.

EPSS: 0.010 (60.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Gargoyle-router Gargoyle — versions 1.12.0
N/a — versions n/a

Weakness classification (CWE)

CWE-834 — Excessive Iteration

References

cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-23270?: CVE-2021-23270 is a high-severity vulnerability in Gargoyle-Router Gargoyle, classified under Excessive Iteration. CVSS score: 7.5/10. Published 2021-04-12.
How severe is CVE-2021-23270?: High severity. CVSS v3 base score is 7.5 out of 10.