CVE-2021-34741

A vulnerability in the email scanning algorithm of Cisco AsyncOS software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to perform a denial of service (DoS) attack against an affected device. This vulnerability is due to insufficient input validation of incoming emails. An attacker could exploit this vulnerability by sending a crafted email through Cisco ESA. A successful exploit could allow the attacker to exhaust all the available CPU resources on an affected device for an extended period of time, preventing other emails from being processed and resulting in a DoS condition.

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-JOm9ETfO	Vendor Advisory

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Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:o:cisco:asyncos:13.7.0-093:::::::*
	cpe:2.3:o:cisco:asyncos:13.5.3-010:::::::*
	cpe:2.3:o:cisco:asyncos::::::::

OR	cpe:2.3:h:cisco:s695:-:::::::*
	cpe:2.3:h:cisco:s395:-:::::::*
	cpe:2.3:h:cisco:s195:-:::::::*
	cpe:2.3:h:cisco:m690x:-:::::::*
	cpe:2.3:h:cisco:m680:-:::::::*
	cpe:2.3:h:cisco:m390:-:::::::*
	cpe:2.3:h:cisco:m390x:-:::::::*
	cpe:2.3:h:cisco:m380:-:::::::*
	cpe:2.3:h:cisco:m190:-:::::::*
	cpe:2.3:h:cisco:m170:-:::::::*
	cpe:2.3:h:cisco:m690:-:::::::*

Information

Published : 2021-11-04 09:15

Updated : 2022-10-27 09:42

NVD link : CVE-2021-34741

Mitre link : CVE-2021-34741

JSON object : View

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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Products Affected

cisco

s695
m680
s395
m170
s195
m690x
m380
asyncos
m690
m390
m390x
m190

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