Scientific Linux Security Update : squid on SL6.x i386/x86_64

This script is Copyright (C) 2016 Tenable Network Security, Inc.

Synopsis :

The remote Scientific Linux host is missing one or more security

Description :

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.

- 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)

See also :

Solution :

Update the affected squid and / or squid-debuginfo packages.

Risk factor :

Medium / CVSS Base Score : 6.8

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 91646 ()

Bugtraq ID:

CVE ID: CVE-2016-4051

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