Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2019.2609
Squid 4.8 is available
15 July 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Squid HTTP Proxy
Publisher: Squid HTTP Proxy Team
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Cross-site Scripting -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-13345 CVE-2019-12854 CVE-2019-12529
CVE-2019-12527 CVE-2019-12525
Reference: ESB-2019.2479
Original Bulletin:
http://lists.squid-cache.org/pipermail/squid-announce/2019-July/000100.html
http://www.squid-cache.org/Advisories/SQUID-2019_1.txt
http://www.squid-cache.org/Advisories/SQUID-2019_2.txt
http://www.squid-cache.org/Advisories/SQUID-2019_3.txt
http://www.squid-cache.org/Advisories/SQUID-2019_5.txt
http://www.squid-cache.org/Advisories/SQUID-2019_6.txt
- --------------------------BEGIN INCLUDED TEXT--------------------
The Squid HTTP Proxy team is very pleased to announce the availability
of the Squid-4.8 release!
This release is a security release resolving several issues found in
the prior Squid releases.
The major changes to be aware of:
* SQUID-2019:1 Denial of Service issue in cachemgr.cgi
(CVE-2019-12854)
This issue security vulnerability is in the cachemgr.cgi tool (not the
squid proxy). With certain requests the cachemgr.cgi may access
unallocated memory.
On systems with memory access protections this can result in the CGI
process terminating unexpectedly. Resulting in a denial of service for
all clients using it.
See the advisory for more details:
<http://www.squid-cache.org/Advisories/SQUID-2019_1.txt>
* SQUID-2019:2 Denial of Service in HTTP Basic Authentication
(CVE-2019-12529)
The Basic authentication credentials decoder may access memory outside
the decode buffer.
On systems with memory access protections this can result in the Squid
process being terminated unexpectedly. Resulting in a denial of service
for all clients using the proxy.
See the advisory for more details:
<http://www.squid-cache.org/Advisories/SQUID-2019_2.txt>
* SQUID-2019:3 Denial of Service in HTTP Digest Authentication
(CVE-2019-12525)
The HTTP Request header parser for Digest authentication may access
memory outside the allocated memory buffer.
On systems with memory access protections this can result in the Squid
process being terminated unexpectedly. Resulting in a denial of service
for all clients using the proxy.
See the advisory for more details:
<http://www.squid-cache.org/Advisories/SQUID-2019_3.txt>
* SQUID-2019:5 Heap Overflow issue in HTTP Basic Authentication
(CVE-2019-12527)
This allows a malicious client to write a substantial amount of
arbitrary data to the heap. Potentially gaining ability to execute
arbitrary code.
On systems with memory access protections this can result in the Squid
process being terminated unexpectedly. Resulting in a denial of service
for all clients using the proxy.
This issue is limited to traffic accessing the Squid Cache Manager
reports or using the FTP protocol gateway.
See the advisory for more details:
<http://www.squid-cache.org/Advisories/SQUID-2019_5.txt>
* SQUID-2019:6 Multiple Cross-Site Scripting issues in cachemgr.cgi
(CVE-2019-13345)
This allows a malicious server to embed URLs in its content such that
user credentials and other information can be extracted from a client or
administrator with access to the Squid cachemgr.cgi tool URL.
See the advisory for more details:
<http://www.squid-cache.org/Advisories/SQUID-2019_6.txt>
* Regression: Fix tls-min-version= being ignored
Squid-4 has been allowing negotiation of TLS versions prohibited by this
option. Also, for some configurations the tls-options= also does not
work as intended. This release fixes both these options to work as
documented.
* Add the NO_TLSv1_3 option to available tls-options values
This release brings the ability to prohibit OpenSSL from negotiating
TLS/1.3 with clients, peers or servers.
* Bug 4953: to_localhost does not include ::
Some OS treat unspecified destination address as an implicit
localhost connection attempt. This was a well-known issue with IPv4
which was supposed to be prohibited with IPv6 traffic. However, once
again OS have appeared which treat IPv6 :: as an alias of localhost.
To make matters worse some domains return :: explicitly as their IP
address to DNS AAAA queries.
We have added ::/128 to the pre-defined to_localhost ACL. Any users of
that ACL not able to update are advised to add this to their squid.conf
immediately:
acl to_localhost dst ::/128
* Bug 4889: Ignore ECONNABORTED in accept(2)
This shows up as a large number of hung socket connections and/or
cache.log entries like:
oldAccept ...: (53) Software caused connection abort
It primarily occurs on OpenBSD 6.5 and later, but may be seen on other
systems as well.
All users of Squid are urged to upgrade as soon as possible.
See the ChangeLog for the full list of changes in this and earlier
releases.
Please refer to the release notes at
http://www.squid-cache.org/Versions/v4/RELEASENOTES.html
when you are ready to make the switch to Squid-4
This new release can be downloaded from our HTTP or FTP servers
http://www.squid-cache.org/Versions/v4/
ftp://ftp.squid-cache.org/pub/squid/
ftp://ftp.squid-cache.org/pub/archive/4/
or the mirrors. For a list of mirror sites see
http://www.squid-cache.org/Download/http-mirrors.html
http://www.squid-cache.org/Download/mirrors.html
If you encounter any issues with this release please file a bug report.
http://bugs.squid-cache.org/
Amos Jeffries
_______________________________________________
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=CXwC
-----END PGP SIGNATURE-----