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CVE-2018-1172

Published: 16 May 2018

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.

Notes

AuthorNote
mdeslaur
squid3 in Ubuntu is not built with OpenSSL support, so Ubuntu
isn't actually vulnerable to this issue.

Priority

Low

Cvss 3 Severity Score

5.9

Score breakdown

Status

Package Release Status
squid3
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Not vulnerable
(not built with --with-openssl)
cosmic Does not exist

trusty Does not exist
(trusty was not-affected [not built with --with-openssl])
upstream Needs triage

xenial Not vulnerable
(not built with --with-openssl)

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H