CVE-2021-34698: high-severity vulnerability in Cisco Web Security Appliance (WSA)
Cisco Web Security Appliance Proxy Service Denial of Service Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.6epss 1.4%
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:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Affected products
Cisco · Cisco Web Security Appliance (WSA)Related CVEs — Cisco Web Security Appliance (WSA)
In the same product, most dangerous first.
CVE-2021-1359MEDIUMCisco Web Security Appliance Privilege Escalation VulnerabilityEPSS 1.9%CVE-2019-1817HIGHCisco Web Security Appliance Malformed Request Denial of Service VulnerabilityEPSS 1.8%CVE-2021-34749MEDIUMMultiple Cisco Products Server Name Identification Data Exfiltration VulnerabilityEPSS 1.7%CVE-2019-1672MEDIUMCisco Web Security Appliance Decryption Policy Bypass VulnerabilityEPSS 1.6%CVE-2019-1884HIGHCisco Web Security Appliance Web Proxy Denial of Service VulnerabilityEPSS 1.5%CVE-2019-1886HIGHCisco Web Security Appliance HTTPS Certificate Denial of Service VulnerabilityEPSS 1.3%