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Vulnerability Details : CVE-2018-1000027

The Squid Software Foundation Squid HTTP Caching Proxy version prior to version 4.0.23 contains a NULL Pointer Dereference vulnerability in HTTP Response X-Forwarded-For header processing that can result in Denial of Service to all clients of the proxy. This attack appear to be exploitable via Remote HTTP server responding with an X-Forwarded-For header to certain types of HTTP request. This vulnerability appears to have been fixed in 4.0.23 and later.
Publish Date : 2018-02-09 Last Update Date : 2019-07-17
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 476

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2020:1068: squid security and bug fix update (Moderate) oval:com.redhat.rhsa:def:20201068 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2018-1000027

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 14.04 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 16.04 * * * Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 17.10 * * * Version Details Vulnerabilities
4 OS Debian Debian Linux 7.0 * * * Version Details Vulnerabilities
5 OS Debian Debian Linux 8.0 * * * Version Details Vulnerabilities
6 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
7 Application Squid-cache Squid * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 3
Debian Debian Linux 3
Squid-cache Squid 1

- References For CVE-2018-1000027

https://usn.ubuntu.com/4059-2/
UBUNTU USN-4059-2
https://www.debian.org/security/2018/dsa-4122
DEBIAN DSA-4122
https://usn.ubuntu.com/3557-1/
UBUNTU USN-3557-1
https://lists.debian.org/debian-lts-announce/2018/02/msg00001.html
MLIST [debian-lts-announce] 20180202 [SECURITY] [DLA 1266-1] squid3 security update
https://lists.debian.org/debian-lts-announce/2018/02/msg00002.html
MLIST [debian-lts-announce] 20180202 [SECURITY] [DLA 1267-1] squid security update
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2018_2.patch CONFIRM
http://www.squid-cache.org/Advisories/SQUID-2018_2.txt CONFIRM
https://github.com/squid-cache/squid/pull/129/files CONFIRM
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2018_2.patch CONFIRM

- Metasploit Modules Related To CVE-2018-1000027

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)
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