// For flags

CVE-2016-4554

squid: Header Smuggling issue in HTTP Request processing

Severity Score

8.6
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

mime_header.cc en Squid en versiones anteriores a 3.5.18 permite a atacantes remotos eludir restricciones destinadas al mismo origen y posiblemente llevar a cabo ataques de envenenamiento de caché a través de una cabecera HTTP Host manipulada, también conocido como un problema "contrabando de peticiones".

An input validation flaw was found in Squid's mime_get_header_field() function, which is used to search for headers within HTTP requests. An attacker could send an HTTP request from the client side with specially crafted header Host header that bypasses same-origin security protections, causing Squid operating as interception or reverse-proxy to contact the wrong origin server. It could also be used for cache poisoning for client not following RFC 7230.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
Attack Vector
Network
Attack Complexity
High
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2016-05-06 CVE Reserved
  • 2016-05-10 CVE Published
  • 2024-05-05 EPSS Updated
  • 2024-08-06 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
  • CWE-345: Insufficient Verification of Data Authenticity
CAPEC
References (19)
URL Tag Source
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html Third Party Advisory
http://www.securitytracker.com/id/1035769 Third Party Advisory
URL Date SRC
URL Date SRC
http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID-2016_8.patch 2019-12-27
http://www.squid-cache.org/Versions/v3/3.2/changesets/SQUID-2016_8.patch 2019-12-27
http://www.squid-cache.org/Versions/v3/3.3/changesets/SQUID-2016_8.patch 2019-12-27
http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_8.patch 2019-12-27
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_8.patch 2019-12-27
URL Date SRC
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html 2019-12-27
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html 2019-12-27
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html 2019-12-27
http://www.debian.org/security/2016/dsa-3625 2019-12-27
http://www.squid-cache.org/Advisories/SQUID-2016_8.txt 2019-12-27
http://www.ubuntu.com/usn/USN-2995-1 2019-12-27
https://access.redhat.com/errata/RHSA-2016:1138 2019-12-27
https://access.redhat.com/errata/RHSA-2016:1139 2019-12-27
https://access.redhat.com/errata/RHSA-2016:1140 2019-12-27
https://security.gentoo.org/glsa/201607-01 2019-12-27
https://access.redhat.com/security/cve/CVE-2016-4554 2016-05-31
https://bugzilla.redhat.com/show_bug.cgi?id=1334241 2016-05-31
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Oracle
Search vendor "Oracle"
 Linux
Search vendor "Oracle" for product "Linux"
 6
Search vendor "Oracle" for product "Linux" and version "6"
-
Affected
Oracle
Search vendor "Oracle"
 Linux
Search vendor "Oracle" for product "Linux"
 7
Search vendor "Oracle" for product "Linux" and version "7"
-
Affected
Squid-cache
Search vendor "Squid-cache"
 Squid
Search vendor "Squid-cache" for product "Squid"
 <= 3.5.17
Search vendor "Squid-cache" for product "Squid" and version " <= 3.5.17"
-
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 12.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"
lts
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 14.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"
lts
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 15.10
Search vendor "Canonical" for product "Ubuntu Linux" and version "15.10"
-
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 16.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"
lts
Affected