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CVE-2019-1921— Cisco Email Security Appliance Content Filter Bypass Vulnerability

Quick assessment

Affected
Cisco Cisco Email Security Appliance (ESA)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco Email Security Appliance（ESA）是美国思科（Cisco）公司的一个电子邮件安全设备。 Cisco ESA中附件的扫描存在输入验证错误漏洞，该漏洞源于程序没有对邮件正文执行正确的输入验证。远程攻击者可通过使用特殊的格式命名恶意的附件利用该漏洞绕过所配置的内容过滤器。

AI Predicted 9.0 Difficulty: Easy EPSS 1.41% · P72
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I. Basic Information for CVE-2019-1921

Vulnerability Information
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Vulnerability Title
Cisco Email Security Appliance Content Filter Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the attachment scanning of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass configured content filters on the device. The vulnerability is due to improper input validation of the email body. An attacker could exploit this vulnerability by naming a malicious attachment with a specific pattern. A successful exploit could allow the attacker to bypass configured content filters that would normally block the attachment.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Email Security Appliance 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Email Security Appliance（ESA）是美国思科（Cisco）公司的一个电子邮件安全设备。 Cisco ESA中附件的扫描存在输入验证错误漏洞，该漏洞源于程序没有对邮件正文执行正确的输入验证。远程攻击者可通过使用特殊的格式命名恶意的附件利用该漏洞绕过所配置的内容过滤器。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Email Security Appliance (ESA) 12.0.0-419 -

II. Public POCs for CVE-2019-1921

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III. Intelligence Information for CVE-2019-1921

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Vendor Advisories for CVE-2019-1921 (1)

Same Patch Batch · Cisco · 2019-07-06 · 13 CVEs total

CVE-2019-1930 Cisco Firepower Management Center RSS Cross-Site Scripting Vulnerabilities
CVE-2019-1931 Cisco Firepower Management Center RSS Cross-Site Scripting Vulnerabilities
CVE-2019-1932 Cisco Advanced Malware Protection for Endpoints Windows Command Injection Vulnerability
CVE-2019-1933 Cisco Email Security Appliance Content Filter Bypass Vulnerability
CVE-2019-1922 Cisco IP Phone 7800 and 8800 Series Session Initiation Protocol Denial of Service Vulnerab
CVE-2019-1893 Cisco Enterprise NFV Infrastructure Software Command Injection Vulnerability
CVE-2019-1894 Cisco Enterprise NFV Infrastructure Software Arbitrary File Read and Write Vulnerability
CVE-2019-1909 Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability
CVE-2019-1911 Cisco Unified Communications Domain Manager Restricted Shell Escape Vulnerability
CVE-2019-1887 Cisco Unified Communications Manager Session Initiation Protocol Denial of Service Vulnera
CVE-2019-1891 Cisco Small Business Series Switches HTTP Denial of Service Vulnerability
CVE-2019-1892 Cisco Small Business Series Switches Memory Corruption Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Email Security Appliance (ESA)
Same vendor: Cisco
Same weakness: CWE-20

V. Comments for CVE-2019-1921

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