// For flags

CVE-2018-1172

The Squid Software Foundation Squid Reverse Proxy sslBumpAccessCheck Null Pointer Dereference Denial of Service Vulnerability

Severity Score

5.9
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

Esta vulnerabilidad permite que atacantes remotos denieguen el servicio de instalaciones vulnerables de The Squid Software Foundation Squid 3.5.27-20180318. No se requiere autenticación para explotar esta vulnerabilidad. Este error en concreto existe en ClientRequestContext::sslBumpAccessCheck(). Una petición manipulada puede desencadenar la desreferencia de un puntero NULL. Un atacante puede aprovechar esta vulnerabilidad para crear una condición de denegación de servicio (DoS) a los usuarios del sistema. Anteriormente era ZDI-CAN-6088.

This vulnerability allows remote attackers to deny service on vulnerable installations of The Squid Software Foundation Squid. 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.

*Credits: Michael Marshall of Trend Micro
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2017-12-05 CVE Reserved
  • 2018-04-19 CVE Published
  • 2024-03-25 EPSS Updated
  • 2024-08-05 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-476: NULL Pointer Dereference
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Squid-cache
Search vendor "Squid-cache"
 Squid
Search vendor "Squid-cache" for product "Squid"
 3.5.27
Search vendor "Squid-cache" for product "Squid" and version "3.5.27"
-
Affected