Input validation error in Squid-cache Squid



Published: 2016-05-10 | Updated: 2020-07-28
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2016-4555
CWE ID CWE-20
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 medium risk vulnerability.

1) Input validation error

Risk: Medium

CVSSv3: 6.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2016-4555

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

client_side_request.cc in Squid 3.x before 3.5.18 and 4.x before 4.0.10 allows remote servers to cause a denial of service (crash) via crafted Edge Side Includes (ESI) responses.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Squid: 2.3.devel2, 2.3.devel3, 2.3.stable1, 2.3.stable2, 2.3.stable3, 2.3.stable4, 2.3.stable5, 3.0, 3.0.stable1, 3.0.stable2, 3.0.stable3, 3.0.stable4, 3.0.stable5, 3.0.stable6, 3.0.stable7, 3.0.stable8, 3.0.stable9, 3.0.stable10, 3.0.stable11, 3.0.stable12, 3.0.stable13, 3.0.stable14, 3.0.stable15, 3.0.stable16, 3.0.stable17, 3.0.stable18, 3.0.stable19, 3.0.stable20, 3.0.stable21, 3.0.stable22, 3.0.stable23, 3.0.stable24, 3.0.stable25, 3.0.stable26, 3.1, 3.1.0.1, 3.1.0.2, 3.1.0.3, 3.1.0.4, 3.1.0.5, 3.1.0.6, 3.1.0.7, 3.1.0.8, 3.1.0.9, 3.1.0.10, 3.1.0.11, 3.1.0.12, 3.1.0.13, 3.1.0.14, 3.1.0.15, 3.1.0.16, 3.1.0.17, 3.1.0.18, 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.5.1, 3.1.6, 3.1.7, 3.1.8, 3.1.9, 3.1.10, 3.1.11, 3.1.12, 3.1.12.1, 3.1.12.2, 3.1.12.3, 3.1.13, 3.1.14, 3.1.15, 3.1.16, 3.1.17, 3.1.18, 3.1.19, 3.1.20, 3.1.21, 3.1.22, 3.1.23, 3.2, 3.2.0.1, 3.2.0.2, 3.2.0.3, 3.2.0.4, 3.2.0.5, 3.2.0.6, 3.2.0.7, 3.2.0.8, 3.2.0.9, 3.2.0.10, 3.2.0.11, 3.2.0.12, 3.2.0.13, 3.2.0.14, 3.2.0.15, 3.2.0.16, 3.2.0.17, 3.2.0.18, 3.2.0.19, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 3.2.10, 3.2.11, 3.2.12, 3.2.13, 3.2.14, 3.3, 3.3.0, 3.3.0.1, 3.3.0.2, 3.3.0.3, 3.3.1, 3.3.2, 3.3.3, 3.3.4, 3.3.5, 3.3.6, 3.3.7, 3.3.8, 3.3.9, 3.3.10, 3.3.11, 3.3.12, 3.3.13, 3.3.14, 3.4, 3.4.0.1, 3.4.0.2, 3.4.0.3, 3.4.1, 3.4.2, 3.4.3, 3.4.4, 3.4.4.1, 3.4.4.2, 3.4.5, 3.4.6, 3.4.7, 3.4.8, 3.4.9, 3.4.10, 3.4.11, 3.4.12, 3.4.13, 3.4.14, 3.5, 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://bugs.squid-cache.org/show_bug.cgi?id=4455
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.openwall.com/lists/oss-security/2016/05/06/3
http://www.openwall.com/lists/oss-security/2016/05/06/5
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.securitytracker.com/id/1035770
http://www.squid-cache.org/Advisories/SQUID-2016_9.txt
http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_9.patch
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_9.patch
http://www.ubuntu.com/usn/USN-2995-1
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.