Ce mail provient de l'extérieur, restons vigilants ===================================================================== CERT-Renater d Note d'Information No. 2025/VULN725 _____________________________________________________________________ DATE : 23/10/2025 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running BIND versions prior to 9.18.41, 9.20.15, 9.21.14, BIND Supported Preview Edition versions prior to 9.18.41-S1, 9.20.15-S1. ===================================================================== https://kb.isc.org/docs/cve-2025-40780 https://kb.isc.org/docs/cve-2025-40778 https://kb.isc.org/docs/cve-2025-8677 _____________________________________________________________________ CVE-2025-40780: Cache poisoning due to weak PRNG New Published on Oct 22, 2025 Darren Ankney Documentation BIND 9 Security Advisories CVE-2025-40780: Cache poisoning due to weak PRNG CVE: CVE-2025-40780 Title: Cache poisoning due to weak PRNG Document version: 2.0 Posting date: 22 October 2025 Program impacted: BIND 9 Versions affected: BIND 9.16.0 -> 9.16.50 9.18.0 -> 9.18.39 9.20.0 -> 9.20.13 9.21.0 -> 9.21.12 BIND Supported Preview Edition 9.16.8-S1 -> 9.16.50-S1 9.18.11-S1 -> 9.18.39-S1 9.20.9-S1 -> 9.20.13-S1 (Versions prior to 9.11.0 were not assessed.) Severity: High Exploitable: Remotely Description: In specific circumstances, due to a weakness in the Pseudo Random Number Generator (PRNG) that is used, it is possible for an attacker to predict the source port and query ID that BIND will use. Impact: BIND can be tricked into caching attacker responses, if the spoofing is successful. Authoritative services are believed to be unaffected by this vulnerability but it is important to read: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries Resolvers are affected by this vulnerability. CVSS Score: 8.6 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit: https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N&version=3.1. Workarounds: No workarounds known. Active exploits: We are not aware of any active exploits. Solution: Upgrade to the patched release most closely related to your current version of BIND 9: 9.18.41 9.20.15 9.21.14 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. 9.18.41-S1 9.20.15-S1 Acknowledgments: ISC would like to thank Prof. Amit Klein and Omer Ben Simhon from Hebrew University of Jerusalem for bringing this vulnerability to our attention. Document revision history: 1.0 Early Notification, 8 October 2025 1.1 Revised public disclosure date, 14 October 2025 1.2 Revised the list of fixed versions, 15 October 2025 2.0 Public disclosure, 22 October 2025 Related documents: See our BIND 9 Security Vulnerability Matrix for a complete listing of security vulnerabilities and versions affected. Do you still have questions? Questions regarding this advisory should be mailed to bind-security@isc.org or posted as confidential GitLab issues at https://gitlab.isc.org/isc-projects/bind9/-/issues/new?issue[confidential]=true. 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 https://www.isc.org/download/. ISC Security Vulnerability Disclosure Policy: Details of our current security advisory policy and practice can be found in the ISC Software Defect and Security Vulnerability Disclosure Policy at https://kb.isc.org/docs/aa-00861. The Knowledgebase article https://kb.isc.org/docs/cve-2025-40780 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. _____________________________________________________________________ CVE-2025-40778: Cache poisoning attacks with unsolicited RRs New Published on Oct 22, 2025 Darren Ankney Documentation BIND 9 Security Advisories CVE-2025-40778: Cache poisoning attacks with unsolicited RRs CVE: CVE-2025-40778 Title: Cache poisoning attacks with unsolicited RRs Document version: 2.0 Posting date: 22 October 2025 Program impacted: BIND 9 Versions affected: BIND 9.11.0 -> 9.16.50 9.18.0 -> 9.18.39 9.20.0 -> 9.20.13 9.21.0 -> 9.21.12 BIND Supported Preview Edition 9.11.3-S1 -> 9.16.50-S1 9.18.11-S1 -> 9.18.39-S1 9.20.9-S1 -> 9.20.13-S1 (Versions prior to 9.11.0 were not specifically assessed but are also believed to be affected) Severity: High Exploitable: Remotely Description: Under certain circumstances, BIND is too lenient when accepting records from answers, allowing an attacker to inject forged data into the cache. Impact: Forged records can be injected into cache during a query, which can potentially affect resolution of future queries. Authoritative services are believed to be unaffected by this vulnerability but it is important to read: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries Resolvers are affected by this vulnerability. CVSS Score: 8.6 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit: https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N&version=3.1. Workarounds: No workarounds known. Active exploits: We are not aware of any active exploits. Solution: Upgrade to the patched release most closely related to your current version of BIND 9: 9.18.41 9.20.15 9.21.14 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. 9.18.41-S1 9.20.15-S1 Acknowledgments: ISC would like to thank Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan from Tsinghua University for bringing this vulnerability to our attention. Document revision history: 1.0 Early Notification, 8 October 2025 1.1 Revised public disclosure date, 14 October 2025 1.2 Revised the list of fixed versions, 15 October 2025 2.0 Public disclosure, 22 October 2025 Related documents: See our BIND 9 Security Vulnerability Matrix for a complete listing of security vulnerabilities and versions affected. Do you still have questions? Questions regarding this advisory should be mailed to bind-security@isc.org or posted as confidential GitLab issues at https://gitlab.isc.org/isc-projects/bind9/-/issues/new?issue[confidential]=true. 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 https://www.isc.org/download/. ISC Security Vulnerability Disclosure Policy: Details of our current security advisory policy and practice can be found in the ISC Software Defect and Security Vulnerability Disclosure Policy at https://kb.isc.org/docs/aa-00861. The Knowledgebase article https://kb.isc..org/docs/cve-2025-40778 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. _____________________________________________________________________ CVE-2025-8677: Resource exhaustion via malformed DNSKEY handling New Published on Oct 22, 2025 DF Ben Scott Documentation BIND 9 Security Advisories CVE-2025-8677: Resource exhaustion via malformed DNSKEY handling CVE: CVE-2025-8677 Title: Resource exhaustion via malformed DNSKEY handling Document version: 2.0 Posting date: 22 October 2025 Program impacted: BIND 9 Versions affected: BIND 9.18.0 -> 9.18.39 9.20.0 -> 9.20.13 9.21.0 -> 9.21.12 BIND Supported Preview Edition 9.18.11-S1 -> 9.18.39-S1 9.20.9-S1 -> 9.20.13-S1 Severity: High Exploitable: Remotely Description: Querying for records within a specially crafted zone containing certain malformed DNSKEY records can lead to CPU exhaustion. Impact: An attacker could overwhelm the server, significantly impacting performance and leading to denial of service for legitimate clients. Authoritative services are believed to be unaffected by this vulnerability but it is important to read: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries Resolvers are affected by this vulnerability. CVSS Score: 7.5 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit: https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H&version=3.1. Workarounds: No workarounds known. Active exploits: We are not aware of any active exploits. Solution: Upgrade to the patched release most closely related to your current version of BIND 9: 9.18.41 9.20.15 9.21.14 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. 9.18.41-S1 9.20.15-S1 Acknowledgments: ISC would like to thank Zuyao Xu and Xiang Li from the All-in-One Security and Privacy Laboratory at Nankai University for bringing this vulnerability to our attention. Document revision history: 1.0 Early Notification, 8 October 2025 1.1 Early fix withdrawn due to regression, 13 October 2025 1.2 Revised public disclosure date, 14 October 2025 1.3 Revised the list of fixed versions, 15 October 2025 2.0 Public disclosure, 22 October 2025 Related documents: See our BIND 9 Security Vulnerability Matrix for a complete listing of security vulnerabilities and versions affected. Do you still have questions? Questions regarding this advisory should be mailed to bind-security@isc.org or posted as confidential GitLab issues at https://gitlab.isc.org/isc-projects/bind9/-/issues/new?issue[confidential]=true. 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 https://www.isc.org/download/. ISC Security Vulnerability Disclosure Policy: Details of our current security advisory policy and practice can be found in the ISC Software Defect and Security Vulnerability Disclosure Policy at https://kb.isc.org/docs/aa-00861. The Knowledgebase article https://kb.isc.org/docs/cve-2025-8677 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. ========================================================= + 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 + =========================================================