Detections
Analytics
Cisco Adaptive Security Appliance Software SSL/TLS DoS (cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx)
high Nessus Plugin ID 168874
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Synopsis
The remote device is missing a vendor-supplied security patchDescription
A vulnerability in the SSL VPN negotiation process for Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to inefficient direct memory access (DMA) memory management during the negotiation phase of an SSL VPN connection. An attacker could exploit this vulnerability by sending a steady stream of crafted Datagram TLS (DTLS) traffic to an affected device. A successful exploit could allow the attacker to exhaust DMA memory on the device and cause a DoS condition.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 Cisco bug ID CSCvu59817See Also
http://www.nessus.org/u?24a25658
https://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74302
Plugin Details
Severity: High
ID: 168874
File Name: cisco-sa-asaftd-sslvpndma-dos-HRrqB9Yx-asa.nasl
Version: 1.3
Type: local
Family: CISCO
Published: 12/16/2022
Updated: 3/31/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
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-2020-3529
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:cisco:firepower_threat_defense
Required KB Items: Host/Cisco/ASA/model
Exploit Ease: No known exploits are available
Patch Publication Date: 10/21/2020
Vulnerability Publication Date: 10/21/2020
Reference Information
CVE: CVE-2020-3529