What is CVE-2021-34698?

CVE-2021-34698 is a high-severity vulnerability in Cisco Asyncos, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 8.6/10. Published 2021-10-06.

How severe is CVE-2021-34698?

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

Vulnerability in Cisco Asyncos

CVE-2021-34698

A vulnerability in the proxy service of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to exhaust system memory and cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper memory management in the proxy service of an affected device. An attacker could exploit this vulnerability by establishing a large number of HTTPS connections to the affected device. A successful exploit could allow the attacker to cause the system to stop processing new connections, which could result in a DoS condition. Note: Manual intervention may be required to recover from this situation.

EPSS: 0.014 (71.3th 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-401 — Missing Release of Memory after Effective Lifetime

References

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

Frequently asked questions

What is CVE-2021-34698?: CVE-2021-34698 is a high-severity vulnerability in Cisco Asyncos, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 8.6/10. Published 2021-10-06.
How severe is CVE-2021-34698?: High severity. CVSS v3 base score is 8.6 out of 10.