Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2271 USN-4031-1: Linux kernel vulnerability 25 June 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Access Privileged Data -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-12817 Original Bulletin: https://usn.ubuntu.com/4031-1/ - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4031-1: Linux kernel vulnerability 24 June 2019 linux, linux-hwe vulnerability A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 19.04 o Ubuntu 18.10 o Ubuntu 18.04 LTS Summary 64-Bit PowerPC systems could be made to expose sensitive information. Software Description o linux - Linux kernel o linux-hwe - Linux hardware enablement (HWE) kernel Details It was discovered that the Linux kernel did not properly separate certain memory mappings when creating new userspace processes on 64-bit Power (ppc64el) systems. A local attacker could use this to access memory contents or cause memory corruption of other processes on the system. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04 linux-image-5.0.0-19-generic - 5.0.0-19.20 linux-image-generic - 5.0.0.19.20 linux-image-virtual - 5.0.0.19.20 Ubuntu 18.10 linux-image-4.18.0-24-generic - 4.18.0-24.25 linux-image-generic - 4.18.0.24.25 linux-image-powerpc-e500mc - 4.18.0.24.25 linux-image-powerpc-smp - 4.18.0.24.25 linux-image-powerpc64-emb - 4.18.0.24.25 linux-image-powerpc64-smp - 4.18.0.24.25 linux-image-virtual - 4.18.0.24.25 Ubuntu 18.04 LTS linux-image-4.18.0-24-generic - 4.18.0-24.25~18.04.1 linux-image-generic-hwe-18.04 - 4.18.0.24.74 linux-image-virtual-hwe-18.04 - 4.18.0.24.74 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References o CVE-2019-12817 - --------------------------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 iQIVAwUBXRFR/2aOgq3Tt24GAQhTvw//UP27IUl5golEVI5OwFNQGJxHJFu/Rg/M w27wNWRQTTXwsvh5N4EvXMpIPYoGyZw98ux2WkpbiOCo0ekrYCrXml/BFGN4byhA whzKJkpK/NgxP8Ic/p3lo1FCXnGqKxud2EZa2S2K9Sp9wipAWMByw0iTRFnZvQ++ zI09ujx6X0grX/VHGDSg4RGuDDc+DmuV++yKtpS58A+R9Kp0tzbJcFc1AGzTaENh U0yMtBIQ2JaLjVyz5ee3T5N2Wj8Ba9El1R0Y4str7jGHYW+Q2K8zhuhthUP2feA1 BhyyzS/QbBX7rwaoYHZLBJaRYX9PxWsEVMfm64E8O+niqEu8uPh8uXWDmSlM4GA2 MmKonVK+lZYpQjVBxxqAGjoUX5pXzqhVLTjh4R2FkJrs8bVjGjlaTqM0oYgvXVJM ifCEwVlor31f3uckK04yqz466XxZtAJ4aMMJMKk9xC2K+sH3hHRiabf6u7x2Jsls 8yZ49qF1WjMGV9as40voRtEULk20vecM9WjC5q1qu736L+kJQc3JmsYTrE2U6m/L vToNgWeb1FvVId1zHLH8Fa8R+48YEG2eea40CyBIBLdqqB0t2ibxDOYRnixuCpzD 4LnQogplNdn04MFJ5Tyw367ljJD56LedibP6NfykLgL+yC7Sujq9gRW22T+0NMU5 zwc1cT9yRag= =3vyJ -----END PGP SIGNATURE-----