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CVE-2019-1905— Cisco Email Security Appliance GZIP 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。AsyncOS Software是运行在其中的一套操作系统。 Cisco ESA中的AsyncOS Software的GZIP解压引擎存在输入验证错误漏洞，该漏洞源于程序没有正确地验证GZIP格式的文件。远程攻击者可借助特制的GZIP压缩文件利用该漏洞绕过所配置的内容过滤器。

AI Predicted 7.5 Difficulty: Easy EPSS 1.36% · P71

Possible ATT&CK Techniques 1 AI

T1565 · Data Manipulation
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I. Basic Information for CVE-2019-1905

Vulnerability Information
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Vulnerability Title
Cisco Email Security Appliance GZIP Content Filter Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the GZIP decompression engine 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 validation of GZIP-formatted files. An attacker could exploit this vulnerability by sending a malicious file inside a crafted GZIP-compressed file. A successful exploit could allow the attacker to bypass configured content filters that would normally drop the email.
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 AsyncOS Software 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。AsyncOS Software是运行在其中的一套操作系统。 Cisco ESA中的AsyncOS Software的GZIP解压引擎存在输入验证错误漏洞，该漏洞源于程序没有正确地验证GZIP格式的文件。远程攻击者可借助特制的GZIP压缩文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 -

II. Public POCs for CVE-2019-1905

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III. Intelligence Information for CVE-2019-1905

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Vendor Advisories for CVE-2019-1905 (2)

Same Patch Batch · Cisco · 2019-06-20 · 24 CVEs total

CVE-2019-1632 Cisco Integrated Management Controller Cross-Site Request Forgery Vulnerability
CVE-2019-1899 Cisco RV110W, RV130W, and RV215W Routers Information Disclosure Vulnerability
CVE-2019-1903 Cisco Security Manager XML Entity Expansion Vulnerability
CVE-2019-1906 Cisco Prime Infrastructure Virtual Domain Privilege Escalation Vulnerability
CVE-2019-1878 Cisco TelePresence Endpoint Command Shell Injection Vulnerability
CVE-2019-1879 Cisco Integrated Management Controller CLI Command Injection Vulnerability
CVE-2019-1897 Cisco RV110W, RV130W, and RV215W Routers Denial of Service Vulnerability
CVE-2019-1898 Cisco RV110W, RV130W, and RV215W Routers Unauthenticated syslog File Access Vulnerability
CVE-2019-1874 Cisco Prime Service Catalog Cross-Site Request Forgery Vulnerability
CVE-2019-1875 Cisco Prime Service Catalog Cross-Site Scripting Vulnerability
CVE-2019-1876 Cisco Wide Area Application Services Software HTTPS Proxy Authentication Bypass Vulnerabil
CVE-2019-1631 Cisco Integrated Management Controller Information Disclosure Vulnerability
CVE-2019-1623 Cisco Meeting Server CLI Command Injection Vulnerability
CVE-2019-1843 Cisco RV110W, RV130W, and RV215W Routers Management Interface Denial of Service Vulnerabil
CVE-2019-1848 Cisco DNA Center Authentication Bypass Vulnerability
CVE-2019-1869 Cisco StarOS Denial of Service Vulnerability
CVE-2019-1627 Cisco Integrated Management Controller Information Disclosure Vulnerability
CVE-2019-1628 Cisco Integrated Management Controller Denial of Service Vulnerability
CVE-2019-1629 Cisco Integrated Management Controller Arbitrary File Write Vulnerability
CVE-2019-1630 Cisco Integrated Management Controller Denial of Service Vulnerability

Showing top 20 of 24 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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

V. Comments for CVE-2019-1905

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