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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2474.2 Dnsmasq vulnerabilities 5 January 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: dnsmasq Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-14496 CVE-2017-14495 CVE-2017-14494 CVE-2017-14493 CVE-2017-14492 CVE-2017-14491 Reference: ESB-2017.2473 ESB-2017.2471 ESB-2017.2470 Original Bulletin: http://www.ubuntu.com/usn/usn-3430-1 http://www.ubuntu.com/usn/usn-3430-3 Revision History: January 5 2018: Vendor updated with regression notification & fix October 3 2017: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3430-1 October 02, 2017 dnsmasq vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 17.04 - - Ubuntu 16.04 LTS - - Ubuntu 14.04 LTS Summary: Several security issues were fixed in Dnsmasq. Software Description: - - dnsmasq: Small caching DNS proxy and DHCP/TFTP server Details: Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-14491) Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled IPv6 router advertisements. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-14492) Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DHCPv6 requests. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-14493) Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DHCPv6 packets. A remote attacker could use this issue to possibly obtain sensitive memory contents. (CVE-2017-14494) Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker could use this issue to cause Dnsmasq to consume memory, resulting in a denial of service. (CVE-2017-14495) Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker could use this issue to cause Dnsmasq to crash, resulting in a denial of service. (CVE-2017-14496) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.04: dnsmasq 2.76-5ubuntu0.1 dnsmasq-base 2.76-5ubuntu0.1 dnsmasq-utils 2.76-5ubuntu0.1 Ubuntu 16.04 LTS: dnsmasq 2.75-1ubuntu0.16.04.3 dnsmasq-base 2.75-1ubuntu0.16.04.3 dnsmasq-utils 2.75-1ubuntu0.16.04.3 Ubuntu 14.04 LTS: dnsmasq 2.68-1ubuntu0.2 dnsmasq-base 2.68-1ubuntu0.2 dnsmasq-utils 2.68-1ubuntu0.2 After a standard system update you need to reboot your computer to make all the necessary changes. References: https://www.ubuntu.com/usn/usn-3430-1 CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494, CVE-2017-14495, CVE-2017-14496 Package Information: https://launchpad.net/ubuntu/+source/dnsmasq/2.76-5ubuntu0.1 https://launchpad.net/ubuntu/+source/dnsmasq/2.75-1ubuntu0.16.04.3 https://launchpad.net/ubuntu/+source/dnsmasq/2.68-1ubuntu0.2 - ------------------------------------------------------------------------------- ========================================================================== Ubuntu Security Notice USN-3430-3 January 04, 2018 dnsmasq regression ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 12.04 ESM Summary: USN-3430-2 introduced regression in Dnsmasq. Software Description: - - dnsmasq: Small caching DNS proxy and DHCP/TFTP server Details: USN-3430-2 fixed several vulnerabilities. The update introduced a new regression that breaks DNS resolution. This update addresses the problem. We apologize for the inconvenience. Original advisory details:  Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher  discovered that Dnsmasq incorrectly handled DNS requests. A remote  attacker could use this issue to cause Dnsmasq to crash, resulting in  a denial of service, or possibly execute arbitrary code.  (CVE-2017-14491)   Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher  discovered that Dnsmasq incorrectly handled IPv6 router  advertisements. A remote attacker could use this issue to cause  Dnsmasq to crash, resulting in a denial of service, or possibly  execute arbitrary code. (CVE-2017-14492)   Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher  discovered that Dnsmasq incorrectly handled DHCPv6 requests. A remote  attacker could use this issue to cause Dnsmasq to crash, resulting in  a denial of service, or possibly execute arbitrary code.  (CVE-2017-14493)   Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher  discovered that Dnsmasq incorrectly handled DHCPv6 packets. A remote  attacker could use this issue to possibly obtain sensitive memory  contents. (CVE-2017-14494)   Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher  discovered that Dnsmasq incorrectly handled DNS requests. A remote  attacker could use this issue to cause Dnsmasq to consume memory,  resulting in a denial of service. (CVE-2017-14495)   Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher  discovered that Dnsmasq incorrectly handled DNS requests. A remote  attacker could use this issue to cause Dnsmasq to crash, resulting in  a denial of service. (CVE-2017-14496) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM:  dnsmasq                         2.59-4ubuntu0.4  dnsmasq-base                    2.59-4ubuntu0.4  dnsmasq-utils                   2.59-4ubuntu0.4 After a standard system update you need to reboot your computer to make all the necessary changes. References:  https://www.ubuntu.com/usn/usn-3430-3  https://www.ubuntu.com/usn/usn-3430-1  https://launchpad.net/bugs/1741262 - --------------------------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 iQIVAwUBWk7R6Ix+lLeg9Ub1AQifsQ/+OjNmr+kLEN8yhpuvF9Nxp6t1ZmT2pBUb by3hVL6zwl5W+7UDzUleHWOqYdbdeliE5P10AnWGYetCWFAKjG/csev7kOaBbncN JGaXQJ+B9GCG/vQfu7CZS8jx1tIjMrGClIvJsRQKuUIW+ZJ1JhbVMkQyat4svGJg i+n/Ed9sKYA3SDc2noJIqVLtamQ6g/aAOJyKyCst4S9ibUEqGe1Gz+J8LuY4JCL6 YRUNTIUxf0zf+orS9O4IdFyxcMjSOKncfAl5MWxadUMNU0Cg7aqsVsQHvL1qd25n NACjIVYlvcx3/hSWZf858BeyT7Z0LZqSZElnT5O1nGj0i3DjUccV5yAGGEAZvmsZ 0l12CLvbJ0knd/knmJB9hhaqlhFCnQfx5QoKUcq4Qvk/5a5kwHJUVP0ewC1SjWxj wC7lDDw9rYvpobJJ35nsULJB/ufTUTtsazFAzqRiTvr+ajxGVKnY93RzGMjj6pYS IMgNDPuFXc+FyZrZ5LntiYMCWRroP1AzSrW230fFnd8V9+ANquNDh/KygIOy7P4W PdgbA0z17LCeyilT8aKc5Y1EJ2GzgYlRP2y0fON20Thxx5FBDTmQWMdDTb/pwk3H fImozufHfnQ+3NLVsPdtLp+tP+qpo70kpCuuWyhatYT0Gct8phLa9JrDwyrlHZFD TXn+XqwDDDk= =O9r1 -----END PGP SIGNATURE-----