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    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.

    Published:Oct 6, 2021
    Last Modified:Nov 21, 2024
    EPS:Oct 6, 2021
    EPSS Score:0.00517
    CVSS Score:8.6

    Affected Products

    Vendor
    Cisco
    Product
    Asyncos
    Vendor
    Cisco
    Product
    Web Security Appliance S170
    Vendor
    Cisco
    Product
    Web Security Appliance S190
    Vendor
    Cisco
    Product
    Web Security Appliance S380
    Vendor
    Cisco
    Product
    Web Security Appliance S390
    Vendor
    Cisco
    Product
    Web Security Appliance S680
    Vendor
    Cisco
    Product
    Web Security Appliance S690
    Vendor
    Cisco
    Product
    Web Security Appliance S690x

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High