CVE-2022-20795
Cisco ASA and FTD DTLS Denial of Service (DoS) Vulnerability
Description
A vulnerability in the implementation of the Datagram TLS (DTLS) protocol in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause high CPU utilization, resulting in a denial of service (DoS) condition. This vulnerability is due to suboptimal processing that occurs when establishing a DTLS tunnel as part of an AnyConnect SSL VPN connection. An attacker could exploit this vulnerability by sending a steady stream of crafted DTLS traffic to an affected device. A successful exploit could allow the attacker to exhaust resources on the affected VPN headend device. This could cause existing DTLS tunnels to stop passing traffic and prevent new DTLS tunnels from establishing, resulting in a DoS condition. Note: When the attack traffic stops, the device recovers gracefully.
INFO
Published Date :
April 21, 2022, 7:15 p.m.
Last Modified :
Nov. 7, 2023, 3:42 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2022-20795 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2022-20795
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2022-20795.
| URL | Resource |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vpndtls-dos-TunzLEV | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
test 反向辣鸡数据投放 CVE-2022-23305 工具 利用 教程 Exploit POC
cve-2020-
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2022-20795 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-20795 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Removed CVSS V3 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Added CVSS V3.1 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L -
CPE Deprecation Remap by [email protected]
Aug. 16, 2023
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.17.0 from (including) 9.17.1.9 OR *cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* versions from (including) 9.17.0 from (including) 9.17.1.9 -
Initial Analysis by [email protected]
May. 04, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vpndtls-dos-TunzLEV No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vpndtls-dos-TunzLEV Vendor Advisory Added CWE NIST CWE-345 Added CPE Configuration AND OR *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions up to (including) 9.16.3 *cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.17.0 up to (including) 9.17.1.9 OR cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asa_for_nexus_1000v:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* versions up to (including) 7.0.1 *cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* versions from (including) 7.1.0.0 up to (including) 7.1.0.1 OR cpe:2.3:h:cisco:firepower_1010:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_1120:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_1140:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_1150:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_2110:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_2120:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_2130:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_2140:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4110:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4112:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4115:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4120:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4125:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4140:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4145:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_4150:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:firepower_9300:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-20795 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-20795
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.14 }} 0.01%
score
0.49013
percentile