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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1740 Linux kernel vulnerabilities 12 June 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Root Compromise -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-8781 CVE-2018-8087 CVE-2018-7492 CVE-2018-1092 CVE-2018-1068 Reference: ESB-2018.1738 ESB-2018.1736 ESB-2018.1727 ESB-2018.0962 ESB-2018.0923 ESB-2018.0844 Original Bulletin: http://www.ubuntu.com/usn/usn-3677-1 http://www.ubuntu.com/usn/usn-3677-2 Comment: This bulletin contains two (2) Ubuntu security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3677-1 June 11, 2018 linux, linux-raspi2 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 17.10 Summary: Several security issues were fixed in the Linux kernel. Software Description: - - linux: Linux kernel - - linux-raspi2: Linux kernel for Raspberry Pi 2 Details: It was discovered that the netfilter subsystem of the Linux kernel did not properly validate ebtables offsets. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-1068) Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly handle corrupted meta data in some situations. An attacker could use this to specially craft an ext4 file system that caused a denial of service (system crash) when mounted. (CVE-2018-1092) It was discovered that a NULL pointer dereference existed in the RDS (Reliable Datagram Sockets) protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-7492) It was discovered that the 802.11 software simulator implementation in the Linux kernel contained a memory leak when handling certain error conditions. A local attacker could possibly use this to cause a denial of service (memory exhaustion). (CVE-2018-8087) Eyal Itkin discovered that the USB displaylink video adapter driver in the Linux kernel did not properly validate mmap offsets sent from userspace. A local attacker could use this to expose sensitive information (kernel memory) or possibly execute arbitrary code. (CVE-2018-8781) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.10: linux-image-4.13.0-1022-raspi2 4.13.0-1022.23 linux-image-4.13.0-45-generic 4.13.0-45.50 linux-image-4.13.0-45-generic-lpae 4.13.0-45.50 linux-image-4.13.0-45-lowlatency 4.13.0-45.50 linux-image-generic 4.13.0.45.48 linux-image-generic-lpae 4.13.0.45.48 linux-image-lowlatency 4.13.0.45.48 linux-image-raspi2 4.13.0.1022.20 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: https://usn.ubuntu.com/usn/usn-3677-1 CVE-2018-1068, CVE-2018-1092, CVE-2018-7492, CVE-2018-8087, CVE-2018-8781 Package Information: https://launchpad.net/ubuntu/+source/linux/4.13.0-45.50 https://launchpad.net/ubuntu/+source/linux-raspi2/4.13.0-1022.23 - ------------------------------------------------------------------------------- ========================================================================== Ubuntu Security Notice USN-3677-2 June 12, 2018 linux-hwe, linux-gcp, linux-oem vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 16.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - - linux-hwe: Linux hardware enablement (HWE) kernel - - linux-oem: Linux kernel for OEM processors Details: USN-3677-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.10. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 17.10 for Ubuntu 16.04 LTS. It was discovered that the netfilter subsystem of the Linux kernel did not properly validate ebtables offsets. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-1068) Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly handle corrupted meta data in some situations. An attacker could use this to specially craft an ext4 file system that caused a denial of service (system crash) when mounted. (CVE-2018-1092) It was discovered that a NULL pointer dereference existed in the RDS (Reliable Datagram Sockets) protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-7492) It was discovered that the 802.11 software simulator implementation in the Linux kernel contained a memory leak when handling certain error conditions. A local attacker could possibly use this to cause a denial of service (memory exhaustion). (CVE-2018-8087) Eyal Itkin discovered that the USB displaylink video adapter driver in the Linux kernel did not properly validate mmap offsets sent from userspace. A local attacker could use this to expose sensitive information (kernel memory) or possibly execute arbitrary code. (CVE-2018-8781) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: linux-image-4.13.0-1019-gcp 4.13.0-1019.23 linux-image-4.13.0-1030-oem 4.13.0-1030.33 linux-image-4.13.0-45-generic 4.13.0-45.50~16.04.1 linux-image-4.13.0-45-generic-lpae 4.13.0-45.50~16.04.1 linux-image-4.13.0-45-lowlatency 4.13.0-45.50~16.04.1 linux-image-gcp 4.13.0.1019.21 linux-image-generic-hwe-16.04 4.13.0.45.64 linux-image-generic-lpae-hwe-16.04 4.13.0.45.64 linux-image-gke 4.13.0.1019.21 linux-image-lowlatency-hwe-16.04 4.13.0.45.64 linux-image-oem 4.13.0.1030.35 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: https://usn.ubuntu.com/usn/usn-3677-2 https://usn.ubuntu.com/usn/usn-3677-1 CVE-2018-1068, CVE-2018-1092, CVE-2018-7492, CVE-2018-8087, CVE-2018-8781 Package Information: https://launchpad.net/ubuntu/+source/linux-gcp/4.13.0-1019.23 https://launchpad.net/ubuntu/+source/linux-hwe/4.13.0-45.50~16.04.1 https://launchpad.net/ubuntu/+source/linux-oem/4.13.0-1030.33 - --------------------------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 iQIVAwUBWx9gd2aOgq3Tt24GAQgoQg/+MgcqbC49kFdzt+YUMjb5SzXKyyCgisjW NTxbmkHqTwdnj/qf7TL0yWvtpNz8dMFkXdGDN7tZEJH08Ez0RWQQMx/zYohiUOx/ luWFy9lE0WC4AEpEkAbJDV5YOSLZfpHV2nwvaHILl10U5VNV6tdIcnPQSEV+VT0a lvppfbqG5XX/Sna5JdvYlti5+PUhhsT52ju3gPThJYQaLGF5luUFxE0ANt3b/ebJ P8S1je2vOrEQ4b2gWZTOVPEggQrwF5MY+WPlsoxGJBsclO8pK22i1lRcmCmTA3cP RNMjnVR+NGcYhIWlkpQVT8JxiSeXjsEoCkqYsvMp4F5pKTZgMkY5zABUKn6Dep4M V/TneZKZaV47ll+ZxALxi7upYnH+PnU5mMl9hCidWgTOsSygUJC0UAGP92KSDomo znF9vMmV9l5hds4itU7YBWrrU8Bdu2hnauDanf2BsmBEiL3xh3SuzGf23mt53mGC tcbIgJxxHLfK22oMDVgt+cPEAAaHL6lPn+0f0CP1CRIBNMKoHZHgYid2wvbh0+Ev CDziMCraGZ1QoER9URsBYCbcnaU7NHmHu8RLj9o4wUVYxlPjeAE2UNW29JI/OQSc pc4X5zcaTXg6uVyk90qzxfckS/JNM80RcgDzkOLmUZmn6wqGQR/6ip0Fcl7D+S1j BRUS5FGcgI8= =jXL/ -----END PGP SIGNATURE-----