A buffer overflow flaw was found in the way the Squid cachemgr.cgi utility processed remotely relayed Squid input. When the CGI interface utility is used, a remote attacker could possibly use this flaw to execute arbitrary code. (CVE-2016-4051)

Buffer overflow and input validation flaws were found in the way Squid processed ESI responses. If Squid was used as a reverse proxy, or for TLS/HTTPS interception, a remote attacker able to control ESI components on an HTTP server could use these flaws to crash Squid, disclose parts of the stack memory, or possibly execute arbitrary code as the user running Squid. (CVE-2016-4052 , CVE-2016-4053 , CVE-2016-4054)

An input validation flaw was found in Squid's mime_get_header_field() function, which is used to search for headers within HTTP requests. An attacker could send an HTTP request from the client side with specially crafted header Host header that bypasses same-origin security protections, causing Squid operating as interception or reverse-proxy to contact the wrong origin server. It could also be used for cache poisoning for client not following RFC 7230.
(CVE-2016-4554)

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. (CVE-2016-4556)

Security Fix(es) :

  - A buffer overflow flaw was found in the way the Squid     cachemgr.cgi utility processed remotely relayed Squid     input. When the CGI interface utility is used, a remote     attacker could possibly use this flaw to execute     arbitrary code. (CVE-2016-4051)

  - Buffer overflow and input validation flaws were found in     the way Squid processed ESI responses. If Squid was used     as a reverse proxy, or for TLS/HTTPS interception, a     remote attacker able to control ESI components on an     HTTP server could use these flaws to crash Squid,     disclose parts of the stack memory, or possibly execute     arbitrary code as the user running Squid.
    (CVE-2016-4052, CVE-2016-4053, CVE-2016-4054)

  - An input validation flaw was found in the way Squid     handled intercepted HTTP Request messages. An attacker     could use this flaw to bypass the protection against     issues related to CVE-2009-0801, and perform cache     poisoning attacks on Squid. (CVE-2016-4553)

  - An input validation flaw was found in Squid's     mime_get_header_field() function, which is used to     search for headers within HTTP requests. An attacker     could send an HTTP request from the client side with     specially crafted header Host header that bypasses     same-origin security protections, causing Squid     operating as interception or reverse-proxy to contact     the wrong origin server. It could also be used for cache     poisoning for client not following RFC 7230.
    (CVE-2016-4554)

  - A NULL pointer dereference flaw was found in the way     Squid processes ESI responses. If Squid was used as a     reverse proxy or for TLS/HTTPS interception, a malicious     server could use this flaw to crash the Squid worker     process. (CVE-2016-4555)

  - 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. (CVE-2016-4556)

Security Fix(es) :

  - A buffer overflow flaw was found in the way the Squid     cachemgr.cgi utility processed remotely relayed Squid     input. When the CGI interface utility is used, a remote     attacker could possibly use this flaw to execute     arbitrary code. (CVE-2016-4051)

  - Buffer overflow and input validation flaws were found in     the way Squid processed ESI responses. If Squid was used     as a reverse proxy, or for TLS/HTTPS interception, a     remote attacker able to control ESI components on an     HTTP server could use these flaws to crash Squid,     disclose parts of the stack memory, or possibly execute     arbitrary code as the user running Squid.
    (CVE-2016-4052, CVE-2016-4053, CVE-2016-4054)

  - An input validation flaw was found in Squid's     mime_get_header_field() function, which is used to     search for headers within HTTP requests. An attacker     could send an HTTP request from the client side with     specially crafted header Host header that bypasses     same-origin security protections, causing Squid     operating as interception or reverse-proxy to contact     the wrong origin server. It could also be used for cache     poisoning for client not following RFC 7230.
    (CVE-2016-4554)

  - 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. (CVE-2016-4556)

Bugfix

----

Security fix for CVE-2016-4553, CVE-2016-4554, CVE-2016-4555, CVE-2016-4556

----

Security fix for CVE-2016-4051, CVE-2016-4052, CVE-2016-4053, CVE-2016-4054

----

Security fix for CVE-2016-3947 and CVE-2016-3948

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for squid3 fixes the following issues :

  - Multiple issues in pinger ICMP processing.
    (CVE-2014-7141, CVE-2014-7142)

  - CVE-2016-3947: Buffer overrun issue in pinger ICMPv6     processing. (bsc#973782)

  - CVE-2016-4554: fix header smuggling issue in HTTP     Request processing (bsc#979010)

  - Fix multiple Denial of Service issues in HTTP Response     processing. (CVE-2016-2569, CVE-2016-2570,     CVE-2016-2571, CVE-2016-2572, bsc#968392, bsc#968393,     bsc#968394, bsc#968395)

  - Regression caused by the DoS fixes above (bsc#993299)

  - CVE-2016-3948: Fix denial of service in HTTP Response     processing (bsc#973783)

  - CVE-2016-4051: fixes buffer overflow in cachemgr.cgi     (bsc#976553)

  - CVE-2016-4052, CVE-2016-4053, CVE-2016-4054 :

  - fixes multiple issues in ESI processing (bsc#976556)

  - CVE-2016-4556: fixes double free vulnerability in Esi.cc     (bsc#979008)

  - CVE-2015-5400: Improper Protection of Alternate Path     (bsc#938715)

  - CVE-2014-6270: fix off-by-one in snmp subsystem     (bsc#895773)

  - Memory leak in squid3 when using external_acl     (bsc#976708)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the squid package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A buffer overflow flaw was found in the way the Squid     cachemgr.cgi utility processed remotely relayed Squid     input. When the CGI interface utility is used, a remote     attacker could possibly use this flaw to execute     arbitrary code. (CVE-2016-4051)

  - Buffer overflow and input validation flaws were found     in the way Squid processed ESI responses. If Squid was     used as a reverse proxy, or for TLS/HTTPS interception,     a remote attacker able to control ESI components on an     HTTP server could use these flaws to crash Squid,     disclose parts of the stack memory, or possibly execute     arbitrary code as the user running Squid.
    (CVE-2016-4052, CVE-2016-4053, CVE-2016-4054)

  - An input validation flaw was found in the way Squid     handled intercepted HTTP Request messages. An attacker     could use this flaw to bypass the protection against     issues related to CVE-2009-0801, and perform cache     poisoning attacks on Squid. (CVE-2016-4553)

  - An input validation flaw was found in Squid's     mime_get_header_field() function, which is used to     search for headers within HTTP requests. An attacker     could send an HTTP request from the client side with     specially crafted header Host header that bypasses     same-origin security protections, causing Squid     operating as interception or reverse-proxy to contact     the wrong origin server. It could also be used for     cache poisoning for client not following RFC 7230.
    (CVE-2016-4554)

  - A NULL pointer dereference flaw was found in the way     Squid processes ESI responses. If Squid was used as a     reverse proxy or for TLS/HTTPS interception, a     malicious server could use this flaw to crash the Squid     worker process. (CVE-2016-4555)

  - 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. (CVE-2016-4556)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Published	Updated	Severity
91627	Amazon Linux AMI : squid (ALAS-2016-713)	Nessus	Amazon Linux Local Security Checks	6/16/2016	4/18/2018	high
91645	Scientific Linux Security Update : squid34 on SL6.x i386/x86_64 (20160531)	Nessus	Scientific Linux Local Security Checks	6/17/2016	1/14/2021	high
91646	Scientific Linux Security Update : squid on SL6.x i386/x86_64 (20160531)	Nessus	Scientific Linux Local Security Checks	6/17/2016	1/14/2021	high
92268	Fedora 24 : 7:squid (2016-95edf19d8a)	Nessus	Fedora Local Security Checks	7/15/2016	2/2/2026	high
93294	SUSE SLES11 Security Update : squid3 (SUSE-SU-2016:2089-1)	Nessus	SuSE Local Security Checks	9/2/2016	1/27/2026	high
99788	EulerOS 2.0 SP1 : squid (EulerOS-SA-2016-1025)	Nessus	Huawei Local Security Checks	5/1/2017	12/22/2025	high

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