CVE-2016-4554: Input Validation
First published: Mon May 09 2016(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/squid | <3.5.18 | 3.5.18 |
| Oracle Linux | =6 | |
| Oracle Linux | =7 | |
| Squid Web Proxy Cache | <=3.5.17 | |
| Ubuntu | =12.04 | |
| Ubuntu | =14.04 | |
| Ubuntu | =15.10 | |
| Ubuntu | =16.04 |
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Reference 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
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1334251
- https://hostoftroubles.com/
- https://bugzilla.redhat.com/show_bug.cgi?id=1334241
Frequently Asked Questions
What is the severity of CVE-2016-4554?
CVE-2016-4554 has a medium severity level due to its potential for abuse via header smuggling and cache poisoning.
How do I fix CVE-2016-4554?
To fix CVE-2016-4554, upgrade Squid to version 3.5.18 or later.
Which versions of Squid are affected by CVE-2016-4554?
CVE-2016-4554 affects Squid versions up to and including 3.5.17.
Can CVE-2016-4554 be exploited remotely?
Yes, CVE-2016-4554 can be exploited remotely by an attacker through a crafted HTTP Host header.
What kind of attack can CVE-2016-4554 allow?
CVE-2016-4554 can allow attackers to conduct cache poisoning attacks, compromising the integrity of the cache data.
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- version/ubuntu/15.10
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