==================================================================== CERT-Renater Note d'Information No. 2016/VULN025 _____________________________________________________________________ DATE : 20/01/2016 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running BIND versions 9 prior to 9.9.8-P3, 9.10.3-P3. ====================================================================== https://kb.isc.org/article/AA-01335 https://kb.isc.org/article/AA-01336 _____________________________________________________________________ CVE: CVE-2015-8704 Document Version: 2.0 Posting date: 19 January 2016 Program Impacted: BIND Versions affected: 9.3.0->9.8.8, 9.9.0->9.9.8-P2, 9.9.3-S1->9.9.8-S3, 9.10.0->9.10.3-P2 Severity: High Exploitable: Remotely Description: A buffer size check used to guard against overflow could cause named to exit with an INSIST failure In apl_42.c. Impact: A server could exit due to an INSIST failure in apl_42.c when performing certain string formatting operations. Examples include (but may not be limited to): - Slaves using text-format db files could be vulnerable if receiving a malformed record in a zone transfer from their master. - Masters using text-format db files could be vulnerable if they accept a malformed record in a DDNS update message. - Recursive resolvers are potentially vulnerable when debug logging, if they are fed a deliberately malformed record by a malicious server. - A server which has cached a specially constructed record could encounter this condition while performing 'rndc dumpdb'. Please Note: Versions of BIND from 9.3 through 9.8 are also affected, but these branches are beyond their "end of life" (EOL) and no longer receive testing or security fixes from ISC. For current information on which versions are actively supported, please see http://www.isc.org/downloads/. CVSS Score: 6.8 CVSS Vector: (AV:N/AC:L/Au:S/C:N/I:N/A:C) For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit: http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2&vector=(AV:N/AC:L/Au:S/C:N/I:N/A:C) Workarounds: None Active exploits: No known active exploits. Solution: Upgrade to the patched release most closely related to your current version of BIND. These can all be downloaded from http://www.isc.org/downloads. - BIND 9 version 9.9.8-P3 - BIND 9 version 9.10.3-P3 BIND 9 Supported Preview edition is a feature preview version of BIND provided exclusively to eligible ISC Support customers. - BIND 9 version 9.9.8-S4 Document Revision History: 1.0 Advance Notification 12 January 2016 2.0 Public Disclosure 19 January 2016 Related Documents: See our BIND9 Security Vulnerability Matrix at https://kb.isc.org/article/AA-00913 for a complete listing of Security Vulnerabilities and versions affected. If you'd like more information on ISC Subscription Support and Advance Security Notifications, please visit http://www.isc.org/support/. Do you still have questions? Questions regarding this advisory should go to security-officer@isc.org. To report a new issue, please encrypt your message using security-officer@isc.org's PGP key which can be found here: https://www.isc.org/downloads/software-support-policy/openpgp-key/. If you are unable to use encrypted email, you may also report new issues at: https://www.isc.org/community/report-bug/. Note: ISC patches only currently supported versions. When possible we indicate EOL versions affected. (For current information on which versions are actively supported, please see http://www.isc.org/downloads/). ISC Security Vulnerability Disclosure Policy: Details of our current security advisory policy and practice can be found here: https://kb.isc.org/article/AA-00861 This Knowledge Base article: https://kb.isc.org/article/AA-01335 is the complete and official security advisory document. Legal Disclaimer: Internet Systems Consortium (ISC) is providing this notice on an "AS IS" basis. No warranty or guarantee of any kind is expressed in this notice and none should be implied. ISC expressly excludes and disclaims any warranties regarding this notice or materials referred to in this notice, including, without limitation, any implied warranty of merchantability, fitness for a particular purpose, absence of hidden defects, or of non-infringement. Your use or reliance on this notice or materials referred to in this notice is at your own risk. ISC may change this notice at any time. A stand-alone copy or paraphrase of the text of this document that omits the document URL is an uncontrolled copy. Uncontrolled copies may lack important information, be out of date, or contain factual errors. (c) 2001-2016 Internet Systems Consortium - --------------------------------------------------------------------------- CVE: CVE-2015-8705 Document Version: 2.0 Posting date: 19 January 2016 Program Impacted: BIND Versions affected: 9.10.0->9.10.3-P2 Severity: Medium Exploitable: Remotely Description: In versions of BIND 9.10, errors can occur when OPT pseudo-RR data or ECS options are formatted to text. In 9.10.3 through 9.10.3-P2, the issue may result in a REQUIRE assertion failure in buffer.c. In prior 9.10 versions, it may result in named crashing (such as with a segmentation fault) or other misbehavior due to a buffer overrun. Impact: This issue can affect both authoritative and recursive servers if they are performing debug logging. (It may also crash related tools which use the same code, such as dig or delv.) CVSS Score: 5.4 CVSS Vector: (AV:N/AC:H/Au:N/C:N/I:N/A:C) For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit: http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2&vector=(AV:N/AC:H/Au:N/C:N/I:N/A:C) Workarounds: CVE-2015-8705 can be avoided in named by disabling debug logging. Active exploits: No known active exploits. Solution: Upgrade to the patched release most closely related to your current version of BIND. This can be downloaded from http://www.isc.org/downloads. - BIND 9 version 9.10.3-P3 Acknowledgements: ISC would like to thank Tatuya Jinmei of Infoblox for discovering and reporting one of the issues corrected in this fix. Document Revision History: 1.0 Advance Notification 12 January 2016 1.1 "Versions affected", "Severity", "Description", and "Impact" information corrected. 15 January 2016 2.0 Public disclosure 19 January 2016 Related Documents: See our BIND9 Security Vulnerability Matrix at https://kb.isc.org/article/AA-00913 for a complete listing of Security Vulnerabilities and versions affected. If you'd like more information on ISC Subscription Support and Advance Security Notifications, please visit http://www.isc.org/support/. Do you still have questions? Questions regarding this advisory should go to security-officer@isc.org. To report a new issue, please encrypt your message using security-officer@isc.org's PGP key which can be found here: https://www.isc.org/downloads/software-support-policy/openpgp-key/. If you are unable to use encrypted email, you may also report new issues at: https://www.isc.org/community/report-bug/. Note: ISC patches only currently supported versions. When possible we indicate EOL versions affected. (For current information on which versions are actively supported, please see http://www.isc.org/downloads/). ISC Security Vulnerability Disclosure Policy: Details of our current security advisory policy and practice can be found here: https://kb.isc.org/article/AA-00861 This Knowledge Base article: https://kb.isc.org/article/AA-01336 is the complete and official security advisory document. Legal Disclaimer: Internet Systems Consortium (ISC) is providing this notice on an "AS IS" basis. No warranty or guarantee of any kind is expressed in this notice and none should be implied. ISC expressly excludes and disclaims any warranties regarding this notice or materials referred to in this notice, including, without limitation, any implied warranty of merchantability, fitness for a particular purpose, absence of hidden defects, or of non-infringement. Your use or reliance on this notice or materials referred to in this notice is at your own risk. ISC may change this notice at any time. A stand-alone copy or paraphrase of the text of this document that omits the document URL is an uncontrolled copy. Uncontrolled copies may lack important information, be out of date, or contain factual errors. (c) 2001-2016 Internet Systems Consortium ========================================================== Serveur de référence du CERT-Renater https://services.renater.fr/ssi/ ========================================================== + CERT-RENATER | tel : 01-53-94-20-44 + + 23 - 25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email: cert@support.renater.fr + ==========================================================