Description
Squid 3.x before 3.5.17 and 4.x before 4.0.9 allow remote attackers to obtain sensitive stack layout information via crafted Edge Side Includes (ESI) responses, related to incorrect use of assert and compiler optimization.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | squid3 | 3.4.8-6+deb8u3 | DSA-3625-1 |
| Debian 7 | squid3 | 3.1.20-2.2+deb7u5 | DLA-478-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | squid3 | 3.5.12-1ubuntu7.2 | USN-2995-1 |
| Ubuntu 14.04 LTS | squid3 | 3.3.8-1ubuntu6.8 | USN-2995-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | squid +1 | 7:3.3.8-26.el7_2.3 | RHSA-2016:1139 |
| RHEL 6 | squid | 7:3.1.23-16.el6_8.4 | RHSA-2016:1138 |
| RHEL 6 | squid34 | 7:3.4.14-9.el6_8.3 | RHSA-2016:1140 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | squid | 3.3.14-20.2 | SUSE-SU-2016:2008-1 |
| SLES 11 SP4 | squid3 | 3.1.23-8.16.30.1 | SUSE-SU-2016:2089-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | squid | 3.3.14-20.2 | SUSE-SU-2016:2008-1 |
| SLES for SAP 11 SP4 | squid3 | 3.1.23-8.16.30.1 | SUSE-SU-2016:2089-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | squid +1 | 7:3.3.8-26.el7_2.3 | ELSA-2016-1139 |
Advisories 9
- RHSA-2016:1140 Red Hat Security Advisory: squid34 security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2016:1139 Red Hat Security Advisory: squid security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2016:1138 Red Hat Security Advisory: squid security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DLA-478-1 squid3 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3625-1 squid3 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2995-1 squid3 vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2016:2008-1 Security update for squid SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2089-1 Security update for squid3 SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2016-1139 Moderate: squid security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 31, 2016
References
- http://www.squid-cache.org/Advisories/SQUID-2016_6.txt
- GLSA-201607-01 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- SUSE-SU-2016:1996 vendor-advisory
- [oss-security] 20160421 CVE Request: Squid HTTP Caching Proxy multiple issues mailing-list
- USN-2995-1 vendor-advisory
- RHSA-2016:1140 vendor-advisory
- openSUSE-SU-2016:2081 vendor-advisory
- RHSA-2016:1138 vendor-advisory
- 91787 vdb-entry
- RHSA-2016:1139 vendor-advisory
- SUSE-SU-2016:2089 vendor-advisory
- [oss-security] 20160420 Re: CVE Request: Squid HTTP Caching Proxy multiple issues mailing-list
- 1035647 vdb-entry
- DSA-3625 vendor-advisory
- 86788 vdb-entry