CVE-2016-4554
squid - security update
8.6
HIGH
CVSS 3.1
EPSS 68.9%
Description
mime_header.cc in Squid before 3.5.18 allows remote attackers to bypass intended same-origin restrictions and possibly conduct cache-poisoning attacks via a crafted HTTP Host header, aka a "header smuggling" issue.
How to fix CVE-2016-4554
To remediate CVE-2016-4554, upgrade the affected package to a fixed version below.
- Debian/squid—upgrade to 4.1-1 or later
- —upgrade to 2.7.STABLE9-4.1+deb7u2 or later
Is CVE-2016-4554 being exploited?
Likely — EPSS is 68.9%, placing CVE-2016-4554 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (2)
- from 0, < 4.1-1
- from 0, < 2.7.STABLE9-4.1+deb7u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.6 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N |