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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2153 Moderate: kernel security and bug fix update 19 August 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Impact/Access: Root Compromise -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2015-3636 Reference: ESB-2015.2079 ESB-2015.2037 ESB-2015.2035 ESB-2015.1865 ESB-2015.1592 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2015-1643.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: kernel security and bug fix update Advisory ID: RHSA-2015:1643-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1643.html Issue date: 2015-08-18 CVE Names: CVE-2015-3636 ===================================================================== 1. Summary: Updated kernel packages that fix one security issue and two bugs are now available for Red Hat Enterprise Linux 6.4 Advanced Update Support. Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Server AUS (v. 6.4) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 6.4) - i386, ppc64, s390x, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. * It was found that the Linux kernel's ping socket implementation did not properly handle socket unhashing during spurious disconnects, which could lead to a use-after-free flaw. On x86-64 architecture systems, a local user able to create ping sockets could use this flaw to crash the system. On non-x86-64 architecture systems, a local user able to create ping sockets could use this flaw to escalate their privileges on the system. (CVE-2015-3636, Moderate) This update also fixes the following bugs: * Due to bad memory or memory corruption, an isolated BUG_ON(mm->nr_ptes) was sometimes reported, indicating that not all the page tables allocated could be found and freed when the exit_mmap() function cleared the user address space. As a consequence, a kernel panic occurred. To fix this bug, the BUG_ON() function has been replaced by WARN_ON(), which prevents the kernel from panicking in the aforementioned situation. (BZ#1235929) * Previously, it was for the ext4 driver to read a metadata block and use it without a verification. If the metadata block was corrupted, a kernel panic could occur. With this update, verification is forced on every buffer before it is used, which uncovers possible corruption and prevents further use of the corrupted metadata buffer. (BZ#1242930) All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1218074 - CVE-2015-3636 kernel: ping sockets: use-after-free leading to local privilege escalation 6. Package List: Red Hat Enterprise Linux Server AUS (v. 6.4): Source: kernel-2.6.32-358.65.1.el6.src.rpm i386: kernel-2.6.32-358.65.1.el6.i686.rpm kernel-debug-2.6.32-358.65.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-358.65.1.el6.i686.rpm kernel-debug-devel-2.6.32-358.65.1.el6.i686.rpm kernel-debuginfo-2.6.32-358.65.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-358.65.1.el6.i686.rpm kernel-devel-2.6.32-358.65.1.el6.i686.rpm kernel-headers-2.6.32-358.65.1.el6.i686.rpm perf-2.6.32-358.65.1.el6.i686.rpm perf-debuginfo-2.6.32-358.65.1.el6.i686.rpm python-perf-debuginfo-2.6.32-358.65.1.el6.i686.rpm noarch: kernel-doc-2.6.32-358.65.1.el6.noarch.rpm kernel-firmware-2.6.32-358.65.1.el6.noarch.rpm ppc64: kernel-2.6.32-358.65.1.el6.ppc64.rpm kernel-bootwrapper-2.6.32-358.65.1.el6.ppc64.rpm kernel-debug-2.6.32-358.65.1.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-358.65.1.el6.ppc64.rpm kernel-debug-devel-2.6.32-358.65.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-358.65.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-358.65.1.el6.ppc64.rpm kernel-devel-2.6.32-358.65.1.el6.ppc64.rpm kernel-headers-2.6.32-358.65.1.el6.ppc64.rpm perf-2.6.32-358.65.1.el6.ppc64.rpm perf-debuginfo-2.6.32-358.65.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-358.65.1.el6.ppc64.rpm s390x: kernel-2.6.32-358.65.1.el6.s390x.rpm kernel-debug-2.6.32-358.65.1.el6.s390x.rpm kernel-debug-debuginfo-2.6.32-358.65.1.el6.s390x.rpm kernel-debug-devel-2.6.32-358.65.1.el6.s390x.rpm kernel-debuginfo-2.6.32-358.65.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-358.65.1.el6.s390x.rpm kernel-devel-2.6.32-358.65.1.el6.s390x.rpm kernel-headers-2.6.32-358.65.1.el6.s390x.rpm kernel-kdump-2.6.32-358.65.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-358.65.1.el6.s390x.rpm kernel-kdump-devel-2.6.32-358.65.1.el6.s390x.rpm perf-2.6.32-358.65.1.el6.s390x.rpm perf-debuginfo-2.6.32-358.65.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-358.65.1.el6.s390x.rpm x86_64: kernel-2.6.32-358.65.1.el6.x86_64.rpm kernel-debug-2.6.32-358.65.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-358.65.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-358.65.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-358.65.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-358.65.1.el6.x86_64.rpm kernel-devel-2.6.32-358.65.1.el6.x86_64.rpm kernel-headers-2.6.32-358.65.1.el6.x86_64.rpm perf-2.6.32-358.65.1.el6.x86_64.rpm perf-debuginfo-2.6.32-358.65.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-358.65.1.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 6.4): Source: kernel-2.6.32-358.65.1.el6.src.rpm i386: kernel-debug-debuginfo-2.6.32-358.65.1.el6.i686.rpm kernel-debuginfo-2.6.32-358.65.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-358.65.1.el6.i686.rpm perf-debuginfo-2.6.32-358.65.1.el6.i686.rpm python-perf-2.6.32-358.65.1.el6.i686.rpm python-perf-debuginfo-2.6.32-358.65.1.el6.i686.rpm ppc64: kernel-debug-debuginfo-2.6.32-358.65.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-358.65.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-358.65.1.el6.ppc64.rpm perf-debuginfo-2.6.32-358.65.1.el6.ppc64.rpm python-perf-2.6.32-358.65.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-358.65.1.el6.ppc64.rpm s390x: kernel-debug-debuginfo-2.6.32-358.65.1.el6.s390x.rpm kernel-debuginfo-2.6.32-358.65.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-358.65.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-358.65.1.el6.s390x.rpm perf-debuginfo-2.6.32-358.65.1.el6.s390x.rpm python-perf-2.6.32-358.65.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-358.65.1.el6.s390x.rpm x86_64: kernel-debug-debuginfo-2.6.32-358.65.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-358.65.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-358.65.1.el6.x86_64.rpm perf-debuginfo-2.6.32-358.65.1.el6.x86_64.rpm python-perf-2.6.32-358.65.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-358.65.1.el6.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2015-3636 https://access.redhat.com/security/updates/classification/#moderate 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2015 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFV04LDXlSAg2UNWIIRAtXhAKCYxNQcpcZdMRm2cp8jj4gZMsGaHACghDrC Y+B0vpAcNZNoFTWjjt2kzcU= =Tb/g - -----END PGP SIGNATURE----- - --------------------------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: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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 iQIVAwUBVdPJ9n6ZAP0PgtI9AQImMA//Qgu/tiYTpQw1ajKg1/OF1yL78MOZ/NnS uMs8JhEVNKKOO5kCjy1GB+H2plGepwR2wFU/5sOZoQ3U4dgLud5V5Z+5PDSrqRVw Uz3xxkflXnyDAqt0Vd1qD7AR1CFJox2h6AzAntEiLbic4AD8SD0+D8Zf3VHGwsgc Bvok7CAVpWY9HtlSYjfDWVMv0AIdnkw4AfNOhWdYEi4wPFuHTuFF4RXlFFmxtA/Z 0I8Tn+gnQUI8TAr+KiYRmB9JeqGl6fmfdKkVhTxEVIhV53QESicX4w9oeAhTUtb7 61nxGW623gkVwMS4fvgwLCbyjvgu++aP8AqwOP/HaB18yMS6GoQDk/+BarpyNB4e ousAG2BGFRs6Xow0B9UjTtCO1mIeWxqKFa6xL0DfAufHCvrP7YDFTr+j69b/wtC8 6bhFb7gAPunLmnEIjbtwakGKfoXH70N0ic02FNg/9fq4uGBcYfgNygNhj6+t1oUS mqIf/Ct+s8aZ9g6YtwL8iLNyI/O5WZEJvtEUroCVd7CplLJgb8aQ3GZDWNcZiFmX CZeCxknsoADl+yuAxA6D/9z8rY6J2dOGQT1n38AG3vxpMr/VCzihJ1vqlbj/sAQ9 wYUyrK/z02MPAPWBZoxmLe7ds8gSPC6wv1sU7YP9XHYGcANtLq1dlZ0pM3MpRcOQ Hj4nQ1xSOt0= =L3ug -----END PGP SIGNATURE-----