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CVE-2018-1172

Quick assessment

Affected
The Squid Software Foundation The Squid Software Foundation Squid
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Squid Software Foundation Squid是一套开源的HTTP缓存代理软件。 Squid Software Foundation Squid 3.5.27-20180318版本中的‘ClientRequestContext::sslBumpAccessCheck()’函数存在安全漏洞。攻击者可通过发送特制的请求利用该漏洞造成拒绝服务（空指针逆向引用）。

AI Predicted 7.5 Difficulty: Easy EPSS 8.61% · P95

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2018-1172

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
This vulnerability allows remote attackers to deny service on vulnerable installations of The Squid Software Foundation Squid 3.5.27-20180318. Authentication is not required to exploit this vulnerability. The specific flaw exists within ClientRequestContext::sslBumpAccessCheck(). A crafted request can trigger the dereference of a null pointer. An attacker can leverage this vulnerability to create a denial-of-service condition to users of the system. Was ZDI-CAN-6088.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Squid Software Foundation Squid 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Squid Software Foundation Squid是一套开源的HTTP缓存代理软件。 Squid Software Foundation Squid 3.5.27-20180318版本中的‘ClientRequestContext::sslBumpAccessCheck()’函数存在安全漏洞。攻击者可通过发送特制的请求利用该漏洞造成拒绝服务（空指针逆向引用）。
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
The Squid Software Foundation The Squid Software Foundation Squid 3.5.27-20180318 -

II. Public POCs for CVE-2018-1172

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III. Intelligence Information for CVE-2018-1172

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IV. Related Vulnerabilities

Same weakness: CWE-476

V. Comments for CVE-2018-1172

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