CVE-2018-1000027

N/A
Published: February 9, 2018 at 11:00 PM UTC
Updated: June 17, 2026 at 01:32 AM UTC
3 products affected across 3 vendorsDebian LinuxUbuntu LinuxCache Squid

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Severity
N/A
Exploit prediction
EPSS 13%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.0.23
Affected range stops below 4.0.23, so it looks safe — our inference, not a vendor statement

References (9)

x_refsource_CONFIRMThird Party Advisory
https://github.com/squid-cache/squid/pull/129/files
Mailing Listx_refsource_MLISTThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/02/msg00001.html
Mailing Listx_refsource_MLISTThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/02/msg00002.html
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
https://usn.ubuntu.com/3557-1/
Vendor Advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4059-2/

CVSS

Confidentiality
NONE
Integrity
NONE
Availability
PARTIAL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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