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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.1756 Squid Proxy Cache Security Update Advisory SQUID-2014:4 3 October 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Squid Publisher: Squid Operating System: Linux variants OS X HP-UX AIX Solaris BSD variants Impact/Access: Access Privileged Data -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-7142 CVE-2014-7141 Original Bulletin: http://www.squid-cache.org/Advisories/SQUID-2014_4.txt - --------------------------BEGIN INCLUDED TEXT-------------------- __________________________________________________________________ Squid Proxy Cache Security Update Advisory SQUID-2014:4 __________________________________________________________________ Advisory ID: SQUID-2014:4 Date: September 15, 2014 Summary: Multiple issues in pinger ICMP processing. Affected versions: Squid 3.x -> 3.4.7 Fixed in version: Squid 3.4.8 __________________________________________________________________ http://www.squid-cache.org/Advisories/SQUID-2014_4.txt http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7141 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7142 __________________________________________________________________ Problem Description: Due to incorrect bounds checking Squid pinger binary is vulnerable to denial of service or information leak attack when processing larger than normal ICMP or ICMPv6 packets. Due to incorrect input validation Squid pinger binary is vulnerable to denial of service or information leak attacks when processing ICMP or ICMPv6 packets. __________________________________________________________________ Severity: Several bugs allow any remote server to perform a denial of service attack on the Squid service by crashing the pinger. Some of these bugs allow attackers to leak arbitrary amounts of information from the heap into Squid log files. This is of higher importance than usual because the pinger process operates with root priviliges. __________________________________________________________________ Updated Packages: This bug is fixed by Squid version 3.4.8 In addition, patches addressing this problem for stable releases can be found in our patch archives: Squid 3.1: http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10490.patch Squid 3.2: http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11830.patch Squid 3.3: http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12683.patch Squid 3.4: http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13173.patch If you are using a prepackaged version of Squid then please refer to the package vendor for availability information on updated packages. __________________________________________________________________ Determining if your version is vulnerable: All Squid built with --disable-icmp are not vulnerable to these problems. Check the server running processes list to determine if the Squid service is running a "pinger" child process. All unpatched Squid-2.x and Squid-3.x versions up to and including 3.4.7 running the pinger process are vulnerable to these problems. __________________________________________________________________ Workaround: Configuring the firewall controlling access to Squid service such that only ICMP ECHO packets are allowed delivery to the Squid pinger process will limit the denial of service vulnerability. __________________________________________________________________ Contact details for the Squid project: For installation / upgrade support on binary packaged versions of Squid: Your first point of contact should be your binary package vendor. If you install and build Squid from the original Squid sources then the squid-users@squid-cache.org mailing list is your primary support point. For subscription details see http://www.squid-cache.org/Support/mailing-lists.html. For reporting of non-security bugs in the latest release the squid bugzilla database should be used http://bugs.squid-cache.org/. For reporting of security sensitive bugs send an email to the squid-bugs@squid-cache.org mailing list. It's a closed list (though anyone can post) and security related bug reports are treated in confidence until the impact has been established. __________________________________________________________________ Credits: Several of the vulnerabilities were discovered and fixed by Sebastian Krahmer of the OpenSUSE Project. Some of the vulnerabilities were discovered and fixed by Amos Jeffries of Treehouse Networks Ltd. __________________________________________________________________ Revision history: 2014-09-09 08:39 GMT Initial Report 2014-09-15 08:15 GMT Patches and Packages Released 2014-09-22 06:08 GMT CVE assignment __________________________________________________________________ END - --------------------------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: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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 iQIVAwUBVC3boBLndAQH1ShLAQL1CBAAsoT5/R9rBV1HO3ZDtax4x2OMHkZTo7W5 2eRyaRbQTMmCL1eqg/cQumPnP2G4CqqzXhfZJMYWQoRTmsJSEFdoFgBH2hfoA1n3 1XchssbUZUNv1Ycf1XnckI1uwNcpbQfhRS2ZCXQFfWOfkFZmwmwB2OLsSmv7Un/g KsJMYOCftMpja8B42A5jDv8uCxkIb67MDKX7Ql/P8fg2rhzTUAb33Obv3urAjON8 KNV/kiqg6SA5o6RyBk3oNyphdOJyXRIowUCA1bH/OLD+vVunox9otAH7BlQBGP3K Z93AwevFP1vzZ0t+Lh90GpMRhJvNo77M0IeArGdYOWqxZCYopQRfKSrhdvdaCdac lfOhDkyPnrjjZYxdmqeeRSQAnCaelBU9D0zVPd2x+Tlo4UGrPbJfDKb5nurQk9uW Mp8CHRWgSN5wJkge6wLzeUL2gHUzWSu1Ty5IqeVnEtXtlIpqT9x0iD4+7yjQ8y01 YIosZfJIWY2LmcYdDEdmVHPdGCtq95zdPlWe+1h3NYr94Ohx6iKBRuOjdGcOgxEU ZvGWlaYH9h6KpmswO49XmMoi7t1AnM1/a3JoLNaPNg2okT5YBMeiEy3RCOw9qASe MLEnr6Xl/jEqind3mTUOZs13hpQJRP+T2Vw7zusBdpDvHswKBBPXZQ6azpah4T05 bMF09J+l8J4= =wnte -----END PGP SIGNATURE-----