CVE-2021-34698

Cisco Web Security Appliance Proxy Service Denial of Service Vulnerability

Description

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.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.52%
Vendor Advisory cisco.com
Affected: Cisco Cisco Web Security Appliance (WSA)
Published at:
Updated at:

References

Link Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-dos-fmHdKswk vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-34698?
CVE-2021-34698 has been scored as a high severity vulnerability.
How to fix CVE-2021-34698?
To fix CVE-2021-34698, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-34698 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-34698 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-34698?
CVE-2021-34698 affects Cisco Cisco Web Security Appliance (WSA).
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