Insufficient verification of data authenticity in Squid-cache Squid

Published: 2016-05-10 | Updated: 2020-07-28

Risk	High
Patch available	YES
Number of vulnerabilities	1
CVE ID	CVE-2016-4554
CWE ID	CWE-345
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Squid Server applications / IDS/IPS systems, Firewalls and proxy servers
Vendor	Squid-cache.org

Security Advisory

This security advisory describes one high risk vulnerability.

1) Insufficient verification of data authenticity

Risk: High

CVSSv3: 7.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2016-4554

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Squid: 3.5.0.1, 3.5.0.2, 3.5.0.3, 3.5.0.4, 3.5.1, 3.5.2, 3.5.3, 3.5.4, 3.5.5, 3.5.6, 3.5.7, 3.5.8, 3.5.9, 3.5.10, 3.5.11, 3.5.12, 3.5.13, 3.5.14, 3.5.15, 3.5.16, 3.5.17

CPE

External 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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.