Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.4287 USN-4191: QEMU vulnerabilities 14 November 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: QEMU Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Access Privileged Data -- Existing Account Denial of Service -- Existing Account Unauthorised Access -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-15890 CVE-2019-14378 CVE-2019-13164 CVE-2019-12155 CVE-2019-12068 Reference: ESB-2019.4253 ESB-2019.4164 ESB-2019.4122 ESB-2019.4105 ESB-2019.3944.2 ESB-2019.3474 Original Bulletin: https://usn.ubuntu.com/4191-1/ https://usn.ubuntu.com/4191-2/ Comment: This bulletin contains two (2) Ubuntu security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4191-1: QEMU vulnerabilities 14 November 2019 qemu vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 19.10 o Ubuntu 19.04 o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Summary Several security issues were fixed in QEMU. Software Description o qemu - Machine emulator and virtualizer Details It was discovered that the LSI SCSI adapter emulator implementation in QEMU did not properly validate executed scripts. A local attacker could use this to cause a denial of service. (CVE-2019-12068) Sergej Schumilo, Cornelius Aschermann and Simon WArner discovered that the qxl paravirtual graphics driver implementation in QEMU contained a null pointer dereference. A local attacker in a guest could use this to cause a denial of service. (CVE-2019-12155) Riccardo Schirone discovered that the QEMU bridge helper did not properly validate network interface names. A local attacker could possibly use this to bypass ACL restrictions. (CVE-2019-13164) It was discovered that a heap-based buffer overflow existed in the SLiRP networking implementation of QEMU. A local attacker in a guest could use this to cause a denial of service or possibly execute arbitrary code in the host. (CVE-2019-14378) It was discovered that a use-after-free vulnerability existed in the SLiRP networking implementation of QEMU. A local attacker in a guest could use this to cause a denial of service. (CVE-2019-15890) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 19.10 qemu - 1:4.0+dfsg-0ubuntu9.1 qemu-kvm - 1:4.0+dfsg-0ubuntu9.1 qemu-system-common - 1:4.0+dfsg-0ubuntu9.1 qemu-system-gui - 1:4.0+dfsg-0ubuntu9.1 qemu-system-x86 - 1:4.0+dfsg-0ubuntu9.1 qemu-user-static - 1:4.0+dfsg-0ubuntu9.1 qemu-utils - 1:4.0+dfsg-0ubuntu9.1 Ubuntu 19.04 qemu - 1:3.1+dfsg-2ubuntu3.6 qemu-kvm - 1:3.1+dfsg-2ubuntu3.6 qemu-system-common - 1:3.1+dfsg-2ubuntu3.6 qemu-system-gui - 1:3.1+dfsg-2ubuntu3.6 qemu-system-x86 - 1:3.1+dfsg-2ubuntu3.6 qemu-user-static - 1:3.1+dfsg-2ubuntu3.6 qemu-utils - 1:3.1+dfsg-2ubuntu3.6 Ubuntu 18.04 LTS qemu - 1:2.11+dfsg-1ubuntu7.20 qemu-kvm - 1:2.11+dfsg-1ubuntu7.20 qemu-system-common - 1:2.11+dfsg-1ubuntu7.20 qemu-system-x86 - 1:2.11+dfsg-1ubuntu7.20 qemu-user-static - 1:2.11+dfsg-1ubuntu7.20 qemu-utils - 1:2.11+dfsg-1ubuntu7.20 Ubuntu 16.04 LTS qemu - 1:2.5+dfsg-5ubuntu10.42 qemu-kvm - 1:2.5+dfsg-5ubuntu10.42 qemu-system-common - 1:2.5+dfsg-5ubuntu10.42 qemu-system-x86 - 1:2.5+dfsg-5ubuntu10.42 qemu-user-static - 1:2.5+dfsg-5ubuntu10.42 qemu-utils - 1:2.5+dfsg-5ubuntu10.42 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . After a standard system update you need to restart all QEMU virtual machines to make all the necessary changes. References o CVE-2019-12068 o CVE-2019-12155 o CVE-2019-13164 o CVE-2019-14378 o CVE-2019-15890 ============================================================================== USN-4191-2: QEMU vulnerabilities 14 November 2019 qemu vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 14.04 ESM Summary Several security issues were fixed in QEMU. Software Description o qemu - Machine emulator and virtualizer Details USN-4191-2 fixed a vulnerability in QEMU. This update provides the corresponding update for Ubuntu 14.04 ESM. Original advisory details: It was discovered that the LSI SCSI adapter emulator implementation in QEMU did not properly validate executed scripts. A local attacker could use this to cause a denial of service. (CVE-2019-12068) Sergej Schumilo, Cornelius Aschermann and Simon WArner discovered that the qxl paravirtual graphics driver implementation in QEMU contained a null pointer dereference. A local attacker in a guest could use this to cause a denial of service. (CVE-2019-12155) Riccardo Schirone discovered that the QEMU bridge helper did not properly validate network interface names. A local attacker could possibly use this to bypass ACL restrictions. (CVE-2019-13164) It was discovered that a heap-based buffer overflow existed in the SLiRP networking implementation of QEMU. A local attacker in a guest could use this to cause a denial of service or possibly execute arbitrary code in the host. (CVE-2019-14378) It was discovered that a use-after-free vulnerability existed in the SLiRP networking implementation of QEMU. A local attacker in a guest could use this to cause a denial of service. (CVE-2019-15890) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM qemu - 2.0.0+dfsg-2ubuntu1.47 qemu-common - 2.0.0+dfsg-2ubuntu1.47 qemu-kvm - 2.0.0+dfsg-2ubuntu1.47 qemu-system-common - 2.0.0+dfsg-2ubuntu1.47 qemu-system-x86 - 2.0.0+dfsg-2ubuntu1.47 qemu-user-static - 2.0.0+dfsg-2ubuntu1.47 qemu-utils - 2.0.0+dfsg-2ubuntu1.47 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . After a standard system update you need to restart all QEMU virtual machines to make all the necessary changes. References o USN-4191-1 o CVE-2019-12068 o CVE-2019-12155 o CVE-2019-13164 o CVE-2019-14378 o CVE-2019-15890 - --------------------------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 iQIVAwUBXczlfmaOgq3Tt24GAQjvrRAAn1wQoo/97srSfkWssFNTe11+KPbim3EB YCIRj+SIdLWNdiOgtF9kdK///8Kj+J09k5O+67sF/AOyM+vcAHVPQpKpfkkSZ65A Mj+wbjCHrXYyyZjLs2ITIV9jCXzZ8ip+XgKrcNLgdBHyJG+DEacTKMQ3ArM6Wa6o ZYdWSbmcJAlMl8IFZVQ8tFPFLaijN4HrvVJtJjRgH6HcuFfCgH7CeyH6R0pflqGF CjV5ss3EMSyRX62AwaZxwu9T8chj5lWi4f/zuzWPOUNjFWcCjWfjMGOkaP2ccSyb t//Zgm9NY76MT9tsW9pDcTmw1x3GbtAv5+hU5eCVFetcsxzCsQWjnqHXlhKZ6BYI qnhQdz0bgXAn2YS9tnPGndHkRpFfk1NmrT8Zxfcxc21MxWzv8VkUbLXWMHVAaJzg afeO4pcTnT6dUpelcPc826KLQLbW84LPBs1r6yDbXmd4xQjC9QwWFlLr2/cdiSn1 b1ZYF9aISHsfqiFijMgVw97BKyS1PngPs+pDu6ZRzdb0fJFwiPIXX6ymYlkNKUbn hPjtKQvO7cVZxjCFZqzJZ/AJM9IrIIdVi+22t083wxWr0vtF8YpdaWfF5BPCNa65 DPIcwbLh8/+n3Xb6K93tKFhSqKkPMzmSmNRm0VbDY4P5TFdlw1x7Kh9n1qgO5yQF NtlQqjT/6Zw= =P8hs -----END PGP SIGNATURE-----