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

CVE-2018-1172

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

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.

MEDIUM · CVSS 5.9 EPSS 0.08729
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  • EPSS percentile: top 7% of all CVEs by exploitation likelihood
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

1
squid-cache squidall versions
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.0 · zdi-disclosures@trendmicro.com
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Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 May 2018 · 09:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

3
suse-csafopenSUSE-SU-2024:11403-1
suse-csafSUSE-SU-2018:1365-1
suse-csafSUSE-SU-2018:1122-1
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.squid-cache.org/Advisories/SQUID-2018_3.txtVendor Advisory
https://zerodayinitiative.com/advisories/ZDI-18-309Third Party AdvisoryVDB Entry
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