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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Asyncos | >= 12.0, < 12.0.3-005 |
| Cisco | Web Security Appliance S170 | - |
| Cisco | Web Security Appliance S190 | - |
| Cisco | Web Security Appliance S380 | - |
| Cisco | Web Security Appliance S390 | - |
| Cisco | Web Security Appliance S680 | - |
| Cisco | Web Security Appliance S690 | - |
| Cisco | Web Security Appliance S690X | - |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wVendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wVendor Advisory
FAQ
What is CVE-2021-34698?
CVE-2021-34698 is a vulnerability with a CVSS score of 8.6 (HIGH). 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...
How severe is CVE-2021-34698?
CVE-2021-34698 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-34698?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Asyncos, Cisco Web Security Appliance S170, Cisco Web Security Appliance S190, Cisco Web Security Appliance S380, Cisco Web Security Appliance S390.