What is CVE-2021-34720?

CVE-2021-34720 is a high-severity vulnerability in Cisco 8101-32fh, classified under CWE-771. CVSS score: 8.6/10. Published 2021-09-09.

How severe is CVE-2021-34720?

High severity. CVSS v3 base score is 8.6 out of 10.

Vulnerability in Cisco 8101-32fh

CVE-2021-34720

A vulnerability in the IP Service Level Agreements (IP SLA) responder and Two-Way Active Measurement Protocol (TWAMP) features of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause device packet memory to become exhausted or cause the IP SLA process to crash, resulting in a denial of service (DoS) condition. This vulnerability exists because socket creation failures are mishandled during the IP SLA and TWAMP processes. An attacker could exploit this vulnerability by sending specific IP SLA or TWAMP packets to an affected device. A successful exploit could allow the attacker to exhaust the packet memory, which will impact other processes, such as routing protocols, or crash the IP SLA process.

EPSS: 0.013 (68.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-771

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2021-34720?: CVE-2021-34720 is a high-severity vulnerability in Cisco 8101-32fh, classified under CWE-771. CVSS score: 8.6/10. Published 2021-09-09.
How severe is CVE-2021-34720?: High severity. CVSS v3 base score is 8.6 out of 10.