Detections
Analytics
Cisco Adaptive Security Appliance Software SSL/TLS DoS (cisco-sa-asa-ssl-vpn-dos-qY7BHpjN)
high Nessus Plugin ID 136916
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Synopsis
The remote device is missing a vendor-supplied security patchDescription
A vulnerability exists in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) handler of Cisco Adaptive Security Appliance (ASA) Software due to improper resource management for inbound SSL/TLS connections. An unauthenticated, remote attacker can exploit this, by establishing multiple SSL/TLS connections with specific conditions to the affected device, in order to exhaust memory resources on the affected device, leading to a denial of service (DoS) condition.Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to the relevant fixed version referenced in the Cisco Security AdvisorySee Also
http://www.nessus.org/u?6420bb6e
Plugin Details
Severity: High
ID: 136916
File Name: cisco-sa-asa-ssl-vpn-dos-qY7BHpjN-asa.nasl
Version: 1.9
Type: local
Family: CISCO
Published: 5/27/2020
Updated: 3/31/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2020-3196
CVSS v3
Risk Factor: High
Base Score: 8.6
Temporal Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:cisco:adaptive_security_appliance_software
Required KB Items: Host/Cisco/ASA
Exploit Ease: No known exploits are available
Patch Publication Date: 5/6/2020
Vulnerability Publication Date: 5/6/2020
Reference Information
CVE: CVE-2020-3196