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CVE
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CVE-2018-1000027Date: (C)2018-02-15   (M)2023-12-22


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.5CVSS Score : 5.0
Exploit Score: 3.9Exploit Score: 10.0
Impact Score: 3.6Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: NONEAuthentication: NONE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: PARTIAL
Integrity: NONE 
Availability: HIGH 
  
Reference:
DSA-4122
USN-3557-1
USN-4059-2
https://lists.debian.org/debian-lts-announce/2018/02/msg00001.html
https://lists.debian.org/debian-lts-announce/2018/02/msg00002.html
http://www.squid-cache.org/Advisories/SQUID-2018_2.txt
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2018_2.patch
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2018_2.patch
https://github.com/squid-cache/squid/pull/129/files

CPE    6
cpe:/o:debian:debian_linux:9.0
cpe:/o:debian:debian_linux:7.0
cpe:/o:debian:debian_linux:8.0
cpe:/a:squid-cache:squid
...
CWE    1
CWE-476
OVAL    18
oval:org.secpod.oval:def:1800289
oval:org.secpod.oval:def:1800865
oval:org.secpod.oval:def:1600930
oval:org.secpod.oval:def:503578
...

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