High severity8.6NVD Advisory· Published May 10, 2016· Updated Jun 17, 2026
CVE-2016-4553
CVE-2016-4553
Description
client_side.cc in Squid before 3.5.18 and 4.x before 4.0.10 does not properly ignore the Host header when absolute-URI is provided, which allows remote attackers to conduct cache-poisoning attacks via an HTTP request.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
21cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*+ 9 more
- cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*range: <=3.5.17
- cpe:2.3:a:squid-cache:squid:4.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:4.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:4.0.3:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:4.0.4:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:4.0.5:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:4.0.6:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:4.0.7:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:4.0.8:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:4.0.9:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*+ 3 more
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:*
- osv-coords5 versionspkg:rpm/opensuse/squid&distro=openSUSE%20Tumbleweedpkg:rpm/suse/squid3&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/squid3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/squid&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1pkg:rpm/suse/squid&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1
< 4.16-1.5+ 4 more
- (no CPE)range: < 4.16-1.5
- (no CPE)range: < 3.1.23-8.16.30.1
- (no CPE)range: < 3.1.23-8.16.30.1
- (no CPE)range: < 3.3.14-20.2
- (no CPE)range: < 3.3.14-20.2
Patches
Vulnerability mechanics
References
13- bugs.squid-cache.org/show_bug.cginvdVendor Advisory
- www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.htmlnvdThird Party Advisory
- www.securitytracker.com/id/1035768nvdThird Party Advisory
- www.squid-cache.org/Advisories/SQUID-2016_7.txtnvdVendor Advisory
- www.ubuntu.com/usn/USN-2995-1nvdThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.htmlnvd
- lists.opensuse.org/opensuse-updates/2016-08/msg00069.htmlnvd
- www.debian.org/security/2016/dsa-3625nvd
- www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-14039.patchnvd
- access.redhat.com/errata/RHSA-2016:1139nvd
- access.redhat.com/errata/RHSA-2016:1140nvd
- security.gentoo.org/glsa/201607-01nvd
News mentions
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