CVE-2021-34698
Cisco Web Security Appliance (WSA) AsyncOS Proxy Service Memory Exhaustion DoS Vulnerability
Description
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.
INFO
Published Date :
Oct. 6, 2021, 8:15 p.m.
Last Modified :
Nov. 7, 2023, 3:36 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.9
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-2021-34698.
| URL | Resource |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-dos-fmHdKswk | 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-34698 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-34698 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:H Added CVSS V3.1 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H -
Initial Analysis by [email protected]
Oct. 14, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:C) 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-wsa-dos-fmHdKswk No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-dos-fmHdKswk Vendor Advisory Added CWE NIST CWE-401 Added CPE Configuration AND OR *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions from (including) 12.0 up to (excluding) 12.0.3-005 *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions from (including) 12.5 up to (excluding) 12.5.2-007 *cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* versions from (including) 14.0 up to (excluding) 14.0.1-014 OR cpe:2.3:h:cisco:web_security_appliance_s170:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:web_security_appliance_s190:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:web_security_appliance_s380:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:web_security_appliance_s390:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:web_security_appliance_s680:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:web_security_appliance_s690:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:web_security_appliance_s690x:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-34698 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-2021-34698
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.16 }} 0.02%
score
0.52642
percentile