National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2018-1000027 Detail

Current Description

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.

Source:  MITRE
Description Last Modified:  02/09/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 3.9

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0

Access Vector (AV): Network
Access Complexity (AC): Insufficient_Info
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.squid-cache.org/Advisories/SQUID-2018_2.txt Patch Vendor Advisory
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2018_2.patch Patch Vendor Advisory
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2018_2.patch Patch Vendor Advisory
https://github.com/squid-cache/squid/pull/129/files Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/02/msg00001.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/02/msg00002.html Third Party Advisory
https://usn.ubuntu.com/3557-1/
https://www.debian.org/security/2018/dsa-4122 Third Party Advisory

Technical Details

Vulnerability Type (View All)

  • NULL Pointer Dereference (CWE-476)

Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-1000027
NVD Published Date:
02/09/2018
NVD Last Modified:
03/15/2018