CVE-2018-1000024

high-risk
Published 2018-02-09

The Squid Software Foundation Squid HTTP Caching Proxy version 3.0 to 3.5.27, 4.0 to 4.0.22 contains a Incorrect Pointer Handling vulnerability in ESI Response Processing that can result in Denial of Service for all clients using the proxy.. This attack appear to be exploitable via Remote server delivers an HTTP response payload containing valid but unusual ESI syntax.. This vulnerability appears to have been fixed in 4.0.23 and later.

Do I need to act?

~
9.2% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (7)

Affected Vendors

Debian Canonical Squid-Cache

References (12)

Patch http://www.squid-cache.org/Advisories/SQUID-2018_1.txt
Release Notes http://www.squid-cache.org/Versions/
Mailing List https://lists.debian.org/debian-lts-announce/2018/02/msg00001.html
Third Party Advisory https://usn.ubuntu.com/3557-1/
https://usn.ubuntu.com/4059-2/
Third Party Advisory https://www.debian.org/security/2018/dsa-4122
Patch http://www.squid-cache.org/Advisories/SQUID-2018_1.txt
Release Notes http://www.squid-cache.org/Versions/
Mailing List https://lists.debian.org/debian-lts-announce/2018/02/msg00001.html
Third Party Advisory https://usn.ubuntu.com/3557-1/
https://usn.ubuntu.com/4059-2/
Third Party Advisory https://www.debian.org/security/2018/dsa-4122
50
/ 100
high-risk
Severity 26/34 · High
Exploitability 10/34 · Low
Exposure 14/34 · Moderate