CVE-2018-1000027
squid - security update
7.5
HIGH
CVSS 3.1
EPSS 66.0%
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.
How to fix CVE-2018-1000027
To remediate CVE-2018-1000027, upgrade the affected package to a fixed version below.
- —upgrade to 3.5.27-r2 or later
- —upgrade to 4.1-1 or later
- —upgrade to 2.7.STABLE9-4.1+deb7u3 or later
Is CVE-2018-1000027 being exploited?
Likely — EPSS is 66.0%, placing CVE-2018-1000027 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (3)
- from 0, < 3.5.27-r2
- from 0, < 4.1-1
- from 0, < 2.7.STABLE9-4.1+deb7u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |