Vulnerability Report

CVE-2016-4554

Title: Squid-Cache Squid

Other

Proof Of Concept

No public PoC currently indexed for CVE-2016-4554.

CWE Category CWE-345
Published Date May 10, 2016
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 8.6 CVSS v3.0
Exploit Probability (EPSS)
38.89%

Vulnerability Summary

CVE-2016-4554: 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.

Impacted Vendors

S
squid 1
S
squid-cache 1

Reference Links

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html http://www.debian.org/security/2016/dsa-3625 http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html http://www.securitytracker.com/id/1035769 http://www.squid-cache.org/Advisories/SQUID-2016_8.txt http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID-2016_8.patch http://www.squid-cache.org/Versions/v3/3.2/changesets/SQUID-2016_8.patch http://www.squid-cache.org/Versions/v3/3.3/changesets/SQUID-2016_8.patch http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_8.patch http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_8.patch http://www.ubuntu.com/usn/USN-2995-1 https://access.redhat.com/errata/RHSA-2016:1138 https://access.redhat.com/errata/RHSA-2016:1139 https://access.redhat.com/errata/RHSA-2016:1140 https://security.gentoo.org/glsa/201607-01 http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html http://www.debian.org/security/2016/dsa-3625 http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html http://www.securitytracker.com/id/1035769 http://www.squid-cache.org/Advisories/SQUID-2016_8.txt http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID-2016_8.patch http://www.squid-cache.org/Versions/v3/3.2/changesets/SQUID-2016_8.patch http://www.squid-cache.org/Versions/v3/3.3/changesets/SQUID-2016_8.patch http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_8.patch http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_8.patch http://www.ubuntu.com/usn/USN-2995-1 https://access.redhat.com/errata/RHSA-2016:1138 https://access.redhat.com/errata/RHSA-2016:1139 https://access.redhat.com/errata/RHSA-2016:1140 https://security.gentoo.org/glsa/201607-01
CVSS v3.0
Source Entity [email protected]
Severity HIGH
8.6
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:N/I:P/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-4554 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Affected Stack

No specific products linked.