7.8

CVE-2021-34698

Cisco Web Security Appliance Proxy Service Denial of Service Vulnerability

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Cisco ≫ Asyncos Version >= 12.0 < 12.0.3-005
   Cisco ≫ Web Security Appliance S170 Version -
   Cisco ≫ Web Security Appliance S190 Version -
   Cisco ≫ Web Security Appliance S380 Version -
   Cisco ≫ Web Security Appliance S390 Version -
   Cisco ≫ Web Security Appliance S680 Version -
   Cisco ≫ Web Security Appliance S690 Version -
   Cisco ≫ Web Security Appliance S690x Version -
Cisco ≫ Asyncos Version >= 12.5 < 12.5.2-007
   Cisco ≫ Web Security Appliance S170 Version -
   Cisco ≫ Web Security Appliance S190 Version -
   Cisco ≫ Web Security Appliance S380 Version -
   Cisco ≫ Web Security Appliance S390 Version -
   Cisco ≫ Web Security Appliance S680 Version -
   Cisco ≫ Web Security Appliance S690 Version -
   Cisco ≫ Web Security Appliance S690x Version -
Cisco ≫ Asyncos Version >= 14.0 < 14.0.1-014
   Cisco ≫ Web Security Appliance S170 Version -
   Cisco ≫ Web Security Appliance S190 Version -
   Cisco ≫ Web Security Appliance S380 Version -
   Cisco ≫ Web Security Appliance S390 Version -
   Cisco ≫ Web Security Appliance S680 Version -
   Cisco ≫ Web Security Appliance S690 Version -
   Cisco ≫ Web Security Appliance S690x Version -
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.43% 0.704
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NIST 7.8 10 6.9
AV:N/AC:L/Au:N/C:N/I:N/A:C
Cisco PSIRT 8.6 3.9 4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-dos-fmHdKswk
Vendor Advisory