CVE-2018-1000027
HIGH severity · CVSS 7.5 · CWE-476
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)13%
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: http://www.squid-cache.org/Advisories/SQUID-2018_2.txt ↗
Additional information
- NVD record
- http://www.squid-cache.org/Advisories/SQUID-2018_2.txtPatch
- http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2018_2.patchPatch
- http://www.squid-cache.org/Versions/v4/changesets/SQUID-2018_2.patchPatch
- https://github.com/squid-cache/squid/pull/129/filesAdvisory
- https://lists.debian.org/debian-lts-announce/2018/02/msg00001.htmlAdvisory
- https://lists.debian.org/debian-lts-announce/2018/02/msg00002.htmlAdvisory
- https://usn.ubuntu.com/3557-1/Advisory
- https://usn.ubuntu.com/4059-2/