Stack-based buffer overflow in Squid-cache Squid

1) Stack-based buffer overflow

EUVDB-ID: #VU32298

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-4052

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing crafted Edge Side Includes (ESI) responses. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update to version 3.5.17.

Vulnerable software versions

Squid: 2.3.stable1 - 3.5.16

CPE2.3

• cpe:2.3:a:squid-cache_org:squid:2.3.stable1:*:*:*:*:*:*:*
• cpe:2.3:a:squid-cache_org:squid:2.3.devel2:*:*:*:*:*:*:*
• cpe:2.3:a:squid-cache_org:squid:2.3.stable2:*:*:*:*:*:*:*
• cpe:2.3:a:squid-cache_org:squid:*:*:*:*:*:*:*:*
• cpe:2.3:a:squid-cache_org:squid:3.0.stable1:*:*:*:*:*:*:*
• cpe:2.3:a:squid-cache_org:squid:3.0.stable2:*:*:*:*:*:*:*
• cpe:2.3:a:squid-cache_org:squid:3.0.stable3:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
https://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
https://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
https://www.debian.org/security/2016/dsa-3625
https://www.openwall.com/lists/oss-security/2016/04/20/6
https://www.openwall.com/lists/oss-security/2016/04/20/9
https://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
https://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
https://www.securityfocus.com/bid/86788
https://www.securityfocus.com/bid/91787
https://www.securitytracker.com/id/1035647
https://www.squid-cache.org/Advisories/SQUID-2016_6.txt
https://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.