CVE-2019-1947 : A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA

A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause the CPU utilization to increase to 100 percent, causing a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of email messages that contain large attachments. An attacker could exploit this vulnerability by sending a malicious email message through the targeted device. A successful exploit could allow the attacker to cause a permanent DoS condition due to high CPU utilization. This vulnerability may require manual intervention to recover the ESA.

Published 2020-09-23 01:15:15

Updated 2020-10-01 14:55:39

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: Input validationDenial of service

Exploit prediction scoring system (EPSS) score for CVE-2019-1947

EPSS FAQ

0.16%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 52 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-1947

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.8	HIGH	AV:N/AC:L/Au:N/C:N/I:N/A:C	10.0	6.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Complete
8.6	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	3.9	4.0	Cisco Systems, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High
8.6	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	3.9	4.0	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2019-1947

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by:

nvd@nist.gov (Primary)
ykramarz@cisco.com (Secondary)

Products affected by CVE-2019-1947

Cisco » Asyncos » Version: 12.1.0-085
cpe:2.3:o:cisco:asyncos:12.1.0-085:*:*:*:*:*:*:*
Matching versions
Cisco » Email Security Appliance » Version: 11.1.0-131
cpe:2.3:a:cisco:email_security_appliance:11.1.0-131:*:*:*:*:*:*:*
Matching versions

Vulnerability Details : CVE-2019-1947

Exploit prediction scoring system (EPSS) score for CVE-2019-1947

CVSS scores for CVE-2019-1947

CWE ids for CVE-2019-1947

References for CVE-2019-1947

Products affected by CVE-2019-1947