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CVE-2018-0447— Cisco Email Security Appliance URL Filtering 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）公司的一套电子邮件安全设备。该设备提供垃圾邮件保护、邮件加密、数据丢失防护等功能。AsyncOS Software是一套使用在其中的操作系统。 Cisco ESA的AsyncOS Software中的反垃圾邮件保护机制存在访问控制错误漏洞，该漏洞源于不完整的输入验证检测机制（用于检测Sender Policy Framework消息）。远程攻击者可通过发送自定义的SPF数据包利用该漏洞绕过设备所配置的URL过滤器

AI Predicted 7.5 Difficulty: Easy EPSS 2.28% · P83

Possible ATT&CK Techniques 1 AI

T1566 · Phishing
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I. Basic Information for CVE-2018-0447

Vulnerability Information
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Vulnerability Title
Cisco Email Security Appliance URL Filtering Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the anti-spam protection mechanisms of Cisco AsyncOS Software for the Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass certain content filters on an affected device. The vulnerability is due to incomplete input and validation checking mechanisms for certain Sender Policy Framework (SPF) messages that are sent to an affected device. An attacker could exploit this vulnerability by sending a customized SPF packet to an affected device. If successful, an exploit could allow the attacker to bypass the URL filters that are configured for the affected device, which could allow malicious URLs to pass through the device.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Email Security Appliance AsyncOS Software 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Email Security Appliance（ESA）是美国思科（Cisco）公司的一套电子邮件安全设备。该设备提供垃圾邮件保护、邮件加密、数据丢失防护等功能。AsyncOS Software是一套使用在其中的操作系统。 Cisco ESA的AsyncOS Software中的反垃圾邮件保护机制存在访问控制错误漏洞，该漏洞源于不完整的输入验证检测机制（用于检测Sender Policy Framework消息）。远程攻击者可通过发送自定义的SPF数据包利用该漏洞绕过设备所配置的URL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) n/a -

II. Public POCs for CVE-2018-0447

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III. Intelligence Information for CVE-2018-0447

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Vendor Advisories for CVE-2018-0447 (2)

Same Patch Batch · Cisco · 2018-10-05 · 110 CVEs total

CVE-2018-15391 Cisco Remote PHY IPv4 Fragment Denial of Service Vulnerability
CVE-2018-15408 Cisco Webex Network Recording Player and Cisco Webex Player Remote Code Execution Vulnerab
CVE-2018-15407 Cisco HyperFlex World-Readable Sensitive Information Vulnerability
CVE-2018-15406 Cisco UCS Director Stored Cross-Site Scripting Vulnerability
CVE-2018-15405 Cisco Integrated Management Controller Supervisor and Cisco UCS Director Authenticated Web
CVE-2018-15404 Cisco Integrated Management Controller Supervisor and Cisco UCS Director System Resources
CVE-2018-15403 Multiple Cisco Unified Communications Products Open Redirect Vulnerability
CVE-2018-15401 Cisco Hosted Collaboration Mediation Fulfillment Cross-Site Request Forgery Vulnerability
CVE-2018-15400 Cisco Cloud Services Platform 2100 Cross-Site Scripting Vulnerability
CVE-2018-15399 Cisco Adaptive Security Appliance TCP Syslog Denial of Service Vulnerability
CVE-2018-15398 Cisco Adaptive Security Appliance Access Control List Bypass Vulnerability
CVE-2018-15397 Cisco Adaptive Security Appliance IPsec VPN Denial of Service Vulnerability
CVE-2018-15396 Cisco Unity Connection File Upload Denial of Service Vulnerability
CVE-2018-15392 Cisco Industrial Network Director DHCP Request Processing Denial of Service Vulnerability
CVE-2018-15374 Cisco IOS XE Software Digital Signature Verification Bypass Vulnerability
CVE-2018-15377 Cisco IOS and IOS XE Software Plug and Play Agent Memory Leak Vulnerability
CVE-2018-15376 Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers Arbitrary M
CVE-2018-15375 Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers Arbitrary M
CVE-2018-15379 Cisco Prime Infrastructure Arbitrary File Upload and Command Execution Vulnerability
CVE-2018-15373 Cisco IOS and IOS XE Software Cisco Discovery Protocol Denial of Service Vulnerability

Showing top 20 of 110 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Email Security Appliance (ESA)
Same vendor: Cisco
Same weakness: CWE-284

V. Comments for CVE-2018-0447

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