CVE-2016-4556
published 2016-05-10CVE-2016-4556: Double free vulnerability in Esi.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 a crafted…
PriorityP344high7.5CVSS 3.0
AVNACLPRNUINSUCNINAH
EPSS
23.11%
97.5th percentile
Double free vulnerability in Esi.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 a crafted Edge Side Includes (ESI) response.
Affected
149 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | squid | — | — |
| oracle | linux | — | — |
| oracle | linux | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
| squid-cache | squid | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →The vulnerability is triggered via a crafted ESI (Edge Side Includes) response from a remote server; monitor Squid worker crashes (SIGSEGV/segfault) originating from ESIContext or ESIInclude::Start processing ↗
- →Exploitation requires Squid to be configured as a reverse-proxy or with TLS/HTTPS interception enabled; scope the detection to those deployment modes ↗
- →Look for repeated or unexpected Squid worker process restarts (crash loop) as an indicator of active exploitation of this double-free in ESI response handling ↗
- ·Only Squid versions 3.x before 3.5.18 and 4.x before 4.0.10 are affected; instances running patched versions are not vulnerable ↗
- ·Red Hat Enterprise Linux 5 is listed as not affected; focus detection efforts on RHEL 6/7 and Fedora deployments running vulnerable Squid builds ↗
- ·Upstream patches are available for Squid 3.5 and 3.4 branches via the SQUID-2016_9 advisory; verify patch application before deprioritising detection ↗
CVSS provenance
nvdv3.07.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv8.2HIGH
vendor_ubuntu8.2HIGH
vendor_debian7.5LOW
vendor_redhat7.5HIGH
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GHSA
GHSA-2xhq-835p-4pg5: Double free vulnerability in Esi
ghsa_unreviewed·2022-05-13
CVE-2016-4556 [HIGH] GHSA-2xhq-835p-4pg5: Double free vulnerability in Esi
Double free vulnerability in Esi.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 a crafted Edge Side Includes (ESI) response.
OSV
squid3 vulnerabilities
osv·2016-06-09·CVSS 8.2
CVE-2016-3947 [HIGH] squid3 vulnerabilities
squid3 vulnerabilities
Yuriy M. Kaminskiy discovered that the Squid pinger utility incorrectly
handled certain ICMPv6 packets. A remote attacker could use this issue to
cause Squid to crash, resulting in a denial of service, or possibly cause
Squid to leak information into log files. (CVE-2016-3947)
Yuriy M. Kaminskiy discovered that the Squid cachemgr.cgi tool incorrectly
handled certain crafted data. A remote attacker could use this issue to
cause Squid to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2016-4051)
It was discovered that Squid incorrectly handled certain Edge Side Includes
(ESI) responses. A remote attacker could possibly use this issue to cause
Squid to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-
OSV
CVE-2016-4556: Double free vulnerability in Esi
osv·2016-05-10·CVSS 7.5
CVE-2016-4556 [HIGH] CVE-2016-4556: Double free vulnerability in Esi
Double free vulnerability in Esi.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 a crafted Edge Side Includes (ESI) response.
Ubuntu
Squid vulnerabilities
vendor_ubuntu·2016-06-09·CVSS 8.2
CVE-2016-3947 [HIGH] Squid vulnerabilities
Title: Squid vulnerabilities
Summary: Several security issues were fixed in Squid.
Yuriy M. Kaminskiy discovered that the Squid pinger utility incorrectly
handled certain ICMPv6 packets. A remote attacker could use this issue to
cause Squid to crash, resulting in a denial of service, or possibly cause
Squid to leak information into log files. (CVE-2016-3947)
Yuriy M. Kaminskiy discovered that the Squid cachemgr.cgi tool incorrectly
handled certain crafted data. A remote attacker could use this issue to
cause Squid to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2016-4051)
It was discovered that Squid incorrectly handled certain Edge Side Includes
(ESI) responses. A remote attacker could possibly use this issue to cause
Squid to crash, resulting in a
Red Hat
squid: SIGSEGV in ESIContext response handling
vendor_redhat·2016-05-06·CVSS 7.5
CVE-2016-4556 [HIGH] CWE-20 squid: SIGSEGV in ESIContext response handling
squid: SIGSEGV in ESIContext response handling
Double free vulnerability in Esi.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 a crafted Edge Side Includes (ESI) response.
An incorrect reference counting flaw was found in the way Squid processes ESI responses. If Squid is configured as reverse-proxy, for TLS/HTTPS interception, an attacker controlling a server accessed by Squid, could crash the squid worker, causing a Denial of Service attack.
Package: squid (Red Hat Enterprise Linux 5) - Not affected
Debian
CVE-2016-4556: squid - Double free vulnerability in Esi.cc in Squid 3.x before 3.5.18 and 4.x before 4....
vendor_debian·2016·CVSS 7.5
CVE-2016-4556 [HIGH] CVE-2016-4556: squid - Double free vulnerability in Esi.cc in Squid 3.x before 3.5.18 and 4.x before 4....
Double free vulnerability in Esi.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 a crafted Edge Side Includes (ESI) response.
Scope: local
bookworm: resolved
bullseye: resolved
forky: resolved
sid: resolved
trixie: resolved
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2016-4556 squid: SIGSEGV in ESIContext response handling
bugzilla·2016-05-10·CVSS 7.5
CVE-2016-4556 [HIGH] CVE-2016-4556 squid: SIGSEGV in ESIContext response handling
CVE-2016-4556 squid: SIGSEGV in ESIContext response handling
Due to incorrect reference counting Squid is vulnerable to a denial of service attack when processing ESI responses.
External references:
http://www.squid-cache.org/Advisories/SQUID-2016_9.txt
Upstream fixes:
Squid 3.5:
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_9.patch
Squid 3.4:
http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_9.patch
NOTE:
For the other related CVE, CVE-2016-4555, see Bug 1334246
Discussion:
Created busybox tracking bugs for this issue:
Affects: fedora-all [bug 1334787]
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2016:1139 https://access.redhat.com/errata/RHSA-2016:1139
---
This issue has been addressed
Bugzilla
CVE-2016-4556 squid: SegFault from ESIInclude::Start [fedora-all]
bugzilla·2016-05-10·CVSS 7.5
CVE-2016-4556 [HIGH] CVE-2016-4556 squid: SegFault from ESIInclude::Start [fedora-all]
CVE-2016-4556 squid: SegFault from ESIInclude::Start [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of Fedora. Whil
Bugzilla
CVE-2016-4553 CVE-2016-4554 CVE-2016-4555 CVE-2016-4556 squid: various flaws [fedora-all]
bugzilla·2016-05-09·CVSS 8.6
CVE-2016-4553 [HIGH] CVE-2016-4553 CVE-2016-4554 CVE-2016-4555 CVE-2016-4556 squid: various flaws [fedora-all]
CVE-2016-4553 CVE-2016-4554 CVE-2016-4555 CVE-2016-4556 squid: various flaws [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported
Bugzilla
CVE-2016-4555 squid: SegFault from ESIInclude::Start
bugzilla·2016-05-09·CVSS 7.5
CVE-2016-4555 [HIGH] CVE-2016-4555 squid: SegFault from ESIInclude::Start
CVE-2016-4555 squid: SegFault from ESIInclude::Start
Due to incorrect pointer handling Squid is vulnerable to a denial of service attack when processing ESI responses.
External references:
http://www.squid-cache.org/Advisories/SQUID-2016_9.txt
Upstream fixes:
Squid 3.5:
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_9.patch
Squid 3.4:
http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_9.patch
NOTE:
For For the other related CVE, CVE-2016-4556, see Bug 1334786
Discussion:
Created squid tracking bugs for this issue:
Affects: fedora-all [bug 1334251]
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2016:1139 https://access.redhat.com/errata/RHSA-2016:1139
---
This issue has been addressed in the
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.htmlhttp://lists.opensuse.org/opensuse-updates/2016-08/msg00069.htmlhttp://www.debian.org/security/2016/dsa-3625http://www.openwall.com/lists/oss-security/2016/05/06/3http://www.openwall.com/lists/oss-security/2016/05/06/5http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.htmlhttp://www.securitytracker.com/id/1035770http://www.squid-cache.org/Advisories/SQUID-2016_9.txthttp://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_9.patchhttp://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_9.patchhttp://www.ubuntu.com/usn/USN-2995-1https://access.redhat.com/errata/RHSA-2016:1138https://access.redhat.com/errata/RHSA-2016:1139https://access.redhat.com/errata/RHSA-2016:1140https://security.gentoo.org/glsa/201607-01http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.htmlhttp://lists.opensuse.org/opensuse-updates/2016-08/msg00069.htmlhttp://www.debian.org/security/2016/dsa-3625http://www.openwall.com/lists/oss-security/2016/05/06/3http://www.openwall.com/lists/oss-security/2016/05/06/5http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.htmlhttp://www.securitytracker.com/id/1035770http://www.squid-cache.org/Advisories/SQUID-2016_9.txthttp://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_9.patchhttp://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_9.patchhttp://www.ubuntu.com/usn/USN-2995-1https://access.redhat.com/errata/RHSA-2016:1138https://access.redhat.com/errata/RHSA-2016:1139https://access.redhat.com/errata/RHSA-2016:1140https://security.gentoo.org/glsa/201607-01
2016-05-10
Published