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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.1158 SUSE Security Update: Recommended update for xen 5 April 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: xen Publisher: SUSE Operating System: SUSE Impact/Access: Increased Privileges -- Existing Account Access Privileged Data -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-19967 Reference: ESB-2019.1098.3 Original Bulletin: https://www.suse.com/support/update/announcement/2019/suse-su-20190875-1/ - --------------------------BEGIN INCLUDED TEXT-------------------- SUSE Security Update: Recommended update for xen ______________________________________________________________________________ Announcement ID: SUSE-SU-2019:0875-1 Rating: important References: #1026236 #1027519 #1114988 #1126140 #1126141 #1126192 #1126195 #1126196 #1126197 #1126198 #1126201 #1126325 #1127400 #1127620 Cross-References: CVE-2018-19967 Affected Products: SUSE Linux Enterprise Module for Server Applications 15 SUSE Linux Enterprise Module for Basesystem 15 ______________________________________________________________________________ An update that solves one vulnerability and has 13 fixes is now available. Description: This update for xen fixes the following issues: Security issues fixed: - CVE-2018-19967: Fixed HLE constructs that allowed guests to lock up the host, resulting in a Denial of Service (DoS). (XSA-282) (bsc#1114988) - Fixed an issue which could allow malicious PV guests may cause a host crash or gain access to data pertaining to other guests.Additionally, vulnerable configurations are likely to be unstable even in the absence of an attack (bsc#1126198). - Fixed multiple access violations introduced by XENMEM_exchange hypercall which could allow a single PV guest to leak arbitrary amounts of memory, leading to a denial of service (bsc#1126192). - Fixed an issue which could allow a malicious unprivileged guest userspace process to escalate its privilege to that of other userspace processes in the same guest and potentially thereby to that of the guest operating system (bsc#1126201). - Fixed an issue which could allow malicious or buggy x86 PV guest kernels to mount a Denial of Service attack affecting the whole system (bsc#1126197). - Fixed an issue which could allow an untrusted PV domain with access to a physical device to DMA into its own pagetables leading to privilege escalation (bsc#1126195). - Fixed an issue which could allow a malicious or buggy x86 PV guest kernels can mount a Denial of Service attack affecting the whole system (bsc#1126196). - Fixed an issue which could allow malicious 64bit PV guests to cause a host crash (bsc#1127400). - Fixed an issue which could allow malicious or buggy guests with passed through PCI devices to be able to escalate their privileges, crash the host, or access data belonging to other guests. Additionally memory leaks were also possible (bsc#1126140). - Fixed a race condition issue which could allow malicious PV guests to escalate their privilege to that of the hypervisor (bsc#1126141). Other issues fixed: - Upstream bug fixes (bsc#1027519) - Fixed an issue where setup of grant_tables and other variables may fail (bsc#1126325). - Added a requirement for xen, xl.cfg firmware="pvgrub32|pvgrub64 (bsc#1127620). - Added Xen cmdline option "suse_vtsc_tolerance" to avoid TSC emulation for HVM domUs (bsc#1026236). Patch Instructions: To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: - SUSE Linux Enterprise Module for Server Applications 15: zypper in -t patch SUSE-SLE-Module-Server-Applications-15-2019-875=1 - SUSE Linux Enterprise Module for Basesystem 15: zypper in -t patch SUSE-SLE-Module-Basesystem-15-2019-875=1 Package List: - SUSE Linux Enterprise Module for Server Applications 15 (x86_64): xen-4.10.3_02-3.14.1 xen-debugsource-4.10.3_02-3.14.1 xen-devel-4.10.3_02-3.14.1 xen-tools-4.10.3_02-3.14.1 xen-tools-debuginfo-4.10.3_02-3.14.1 - SUSE Linux Enterprise Module for Basesystem 15 (x86_64): xen-debugsource-4.10.3_02-3.14.1 xen-libs-4.10.3_02-3.14.1 xen-libs-debuginfo-4.10.3_02-3.14.1 xen-tools-domU-4.10.3_02-3.14.1 xen-tools-domU-debuginfo-4.10.3_02-3.14.1 References: https://www.suse.com/security/cve/CVE-2018-19967.html https://bugzilla.suse.com/1026236 https://bugzilla.suse.com/1027519 https://bugzilla.suse.com/1114988 https://bugzilla.suse.com/1126140 https://bugzilla.suse.com/1126141 https://bugzilla.suse.com/1126192 https://bugzilla.suse.com/1126195 https://bugzilla.suse.com/1126196 https://bugzilla.suse.com/1126197 https://bugzilla.suse.com/1126198 https://bugzilla.suse.com/1126201 https://bugzilla.suse.com/1126325 https://bugzilla.suse.com/1127400 https://bugzilla.suse.com/1127620 - --------------------------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). 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