CVE-2016-4554

Linux vulnerability

CVSS

8.6

EPSS

38.9%

EPSS pct

98th

Exploited

No known

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.

Affected vendor

Oracle

Affected product

Linux

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Weakness type (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

Published

2016-05-10

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to integrity.

Its EPSS score of 38.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2016-4554

Confirm whether Oracle Linux is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2016-4554.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2016-4554

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2016-4554 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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