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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2079 Moderate: kernel security and bug fix update 12 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-2015.2037 ESB-2015.2035 ESB-2015.1865 ESB-2015.1592 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2015-1583.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-2015:1583-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1583.html Issue date: 2015-08-11 CVE Names: CVE-2015-3636 ===================================================================== 1. Summary: Updated kernel packages that fix one security issue and several bugs are now available for Red Hat Enterprise Linux 6.5 Extended 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 Compute Node Optional EUS (v. 6.5) - x86_64 Red Hat Enterprise Linux HPC Node EUS (v. 6.5) - noarch, x86_64 Red Hat Enterprise Linux Server EUS (v. 6.5) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 6.5) - 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: * Previously, the bridge device did not propagate VLAN information to its ports and Generic Receive Offload (GRO) information to devices that sit on top. This resulted in lower receive performance of VLANs over bridge devices because GRO was not enabled. An attempt to resolve this problem was made with BZ#858198 by introducing a patch that allows VLANs to be registered with the participating bridge ports and adds GRO to the bridge device feature set, however, that attempt introduced a number of regressions, which broke the vast majority of stacked setups involving bridge devices and VLANs. This update reverts the patch provided by BZ#858198 and removes support for this capability. (BZ#1131697) * The backlog data could previously not be consumed when the audit_log_start() function was running even if audit_log_start() called the wait_for_auditd() function to consume it. As only auditd could consume the backlog data, audit_log_start() terminated unexpectedly. Consequently, the system became unresponsive until the backlog timeout was up again. With this update, audit_log_start() no longer terminates and the system shuts down and reboots gracefully in a timely manner. (BZ#1140490) * This update introduces a set of patches with a new VLAN model to conform to upstream standards. In addition, this set of patches fixes other issues such as transmission of Internet Control Message Protocol (ICMP) fragments. (BZ#1173560) * Due to a bug in the audit code, a kernel panic occurred in the tasklist_lock variable if SELinux was in permissive or enforcing mode. A patch has been applied to fix this bug, and the operating system now continues to work normally. (BZ#1236103) * If a server returned an empty or malformed READDIR response, the NFS client could previously terminate unexpectedly while attempting to decode that response. This update uses the response size to determine if existing pages of data are available for decoding, and the client only decodes the responses if they exist. As a result, the NFS client no longer attempts to decode pages of data that may not exist, and the aforementioned crash is thus avoided. (BZ#1232133) * Previously, if a slave device had a receive handler registered, then an error unwind of bonding device enslave function became broken, which led to a kernel oops. This update detaches the slave in the unwind path, and the aforementioned oops no longer occurs. (BZ#1222482) * 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#1235930) 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 HPC Node EUS (v. 6.5): Source: kernel-2.6.32-431.61.2.el6.src.rpm noarch: kernel-abi-whitelists-2.6.32-431.61.2.el6.noarch.rpm kernel-doc-2.6.32-431.61.2.el6.noarch.rpm kernel-firmware-2.6.32-431.61.2.el6.noarch.rpm x86_64: kernel-2.6.32-431.61.2.el6.x86_64.rpm kernel-debug-2.6.32-431.61.2.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm kernel-debug-devel-2.6.32-431.61.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-431.61.2.el6.x86_64.rpm kernel-devel-2.6.32-431.61.2.el6.x86_64.rpm kernel-headers-2.6.32-431.61.2.el6.x86_64.rpm perf-2.6.32-431.61.2.el6.x86_64.rpm perf-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.5): Source: kernel-2.6.32-431.61.2.el6.src.rpm x86_64: kernel-debug-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-431.61.2.el6.x86_64.rpm perf-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm python-perf-2.6.32-431.61.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 6.5): Source: kernel-2.6.32-431.61.2.el6.src.rpm i386: kernel-2.6.32-431.61.2.el6.i686.rpm kernel-debug-2.6.32-431.61.2.el6.i686.rpm kernel-debug-debuginfo-2.6.32-431.61.2.el6.i686.rpm kernel-debug-devel-2.6.32-431.61.2.el6.i686.rpm kernel-debuginfo-2.6.32-431.61.2.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-431.61.2.el6.i686.rpm kernel-devel-2.6.32-431.61.2.el6.i686.rpm kernel-headers-2.6.32-431.61.2.el6.i686.rpm perf-2.6.32-431.61.2.el6.i686.rpm perf-debuginfo-2.6.32-431.61.2.el6.i686.rpm python-perf-debuginfo-2.6.32-431.61.2.el6.i686.rpm noarch: kernel-abi-whitelists-2.6.32-431.61.2.el6.noarch.rpm kernel-doc-2.6.32-431.61.2.el6.noarch.rpm kernel-firmware-2.6.32-431.61.2.el6.noarch.rpm ppc64: kernel-2.6.32-431.61.2.el6.ppc64.rpm kernel-bootwrapper-2.6.32-431.61.2.el6.ppc64.rpm kernel-debug-2.6.32-431.61.2.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-431.61.2.el6.ppc64.rpm kernel-debug-devel-2.6.32-431.61.2.el6.ppc64.rpm kernel-debuginfo-2.6.32-431.61.2.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-431.61.2.el6.ppc64.rpm kernel-devel-2.6.32-431.61.2.el6.ppc64.rpm kernel-headers-2.6.32-431.61.2.el6.ppc64.rpm perf-2.6.32-431.61.2.el6.ppc64.rpm perf-debuginfo-2.6.32-431.61.2.el6.ppc64.rpm python-perf-debuginfo-2.6.32-431.61.2.el6.ppc64.rpm s390x: kernel-2.6.32-431.61.2.el6.s390x.rpm kernel-debug-2.6.32-431.61.2.el6.s390x.rpm kernel-debug-debuginfo-2.6.32-431.61.2.el6.s390x.rpm kernel-debug-devel-2.6.32-431.61.2.el6.s390x.rpm kernel-debuginfo-2.6.32-431.61.2.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-431.61.2.el6.s390x.rpm kernel-devel-2.6.32-431.61.2.el6.s390x.rpm kernel-headers-2.6.32-431.61.2.el6.s390x.rpm kernel-kdump-2.6.32-431.61.2.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-431.61.2.el6.s390x.rpm kernel-kdump-devel-2.6.32-431.61.2.el6.s390x.rpm perf-2.6.32-431.61.2.el6.s390x.rpm perf-debuginfo-2.6.32-431.61.2.el6.s390x.rpm python-perf-debuginfo-2.6.32-431.61.2.el6.s390x.rpm x86_64: kernel-2.6.32-431.61.2.el6.x86_64.rpm kernel-debug-2.6.32-431.61.2.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm kernel-debug-devel-2.6.32-431.61.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-431.61.2.el6.x86_64.rpm kernel-devel-2.6.32-431.61.2.el6.x86_64.rpm kernel-headers-2.6.32-431.61.2.el6.x86_64.rpm perf-2.6.32-431.61.2.el6.x86_64.rpm perf-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 6.5): Source: kernel-2.6.32-431.61.2.el6.src.rpm i386: kernel-debug-debuginfo-2.6.32-431.61.2.el6.i686.rpm kernel-debuginfo-2.6.32-431.61.2.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-431.61.2.el6.i686.rpm perf-debuginfo-2.6.32-431.61.2.el6.i686.rpm python-perf-2.6.32-431.61.2.el6.i686.rpm python-perf-debuginfo-2.6.32-431.61.2.el6.i686.rpm ppc64: kernel-debug-debuginfo-2.6.32-431.61.2.el6.ppc64.rpm kernel-debuginfo-2.6.32-431.61.2.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-431.61.2.el6.ppc64.rpm perf-debuginfo-2.6.32-431.61.2.el6.ppc64.rpm python-perf-2.6.32-431.61.2.el6.ppc64.rpm python-perf-debuginfo-2.6.32-431.61.2.el6.ppc64.rpm s390x: kernel-debug-debuginfo-2.6.32-431.61.2.el6.s390x.rpm kernel-debuginfo-2.6.32-431.61.2.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-431.61.2.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-431.61.2.el6.s390x.rpm perf-debuginfo-2.6.32-431.61.2.el6.s390x.rpm python-perf-2.6.32-431.61.2.el6.s390x.rpm python-perf-debuginfo-2.6.32-431.61.2.el6.s390x.rpm x86_64: kernel-debug-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-431.61.2.el6.x86_64.rpm perf-debuginfo-2.6.32-431.61.2.el6.x86_64.rpm python-perf-2.6.32-431.61.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-431.61.2.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 iD8DBQFVyg3MXlSAg2UNWIIRApHOAKCQLSI7H+SCy1hQSQ/3zKH1kUqoiACaAwoX gAcx0r9Pffm+qmcpxeP4ehc= =rMCo - -----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 iQIVAwUBVcqiHH6ZAP0PgtI9AQJp2xAAxDv4i2FSPb+l1Ka5MUI1RAb7QYQY/IJZ fU1cF5NLsTA5WJtEBjrBgszzxHMOons6nBXVzOzqZxj2hynV/u82NayEZiMSEm5L Y2rmBwpTtg+Lf6khsFXNeEkH2zF+joQ7JZEMkCXjG3o9efDxFPDu1CuE2MqTfcHE MNPrZPjUXdq4dhmQhk3nSqeRMVYOpkGPNoNimNl5uqm69tTfiruHMO3P70EwEPLB 3SzGZcK5krfsO8vPpGUH+SzbSqIPg7e19yfC3v5GMcUaJUKUBxCuvwN0grRTemGa r8NCqnhKpwOcxlUhiGrYT2vznVuXMOP/9y6XKPcmU2dZhyBJ7nIaWJcP1Yigty20 syB0eFacqNd47AJRrQhvCKFC5WBCOAhOrCB9XFA8EvvFFxZEVxfSbt2mLMLaBuT0 x9giGjIwAoeVATzDKQ5F5KNxhJqFKyj75zy0QYa7lFL7/TfFdGLI5JFgGMgGfHyI kLoCMepQGxl9m4Un/nAMzvGkrz9mrLgbV/2gCn1/60cByPwcf9tRbuHvS5mrPzr/ E6XkZW8v67MLr0EHOt6O4Ue7oKKAihpHz5sg+VrNI4lLGzft3otFpU6/7WJZemHC GMNdK07jejw7o5Hu0RvqH/6JWoSG8xxMIG0bQHt8qXnsWgp/DasEkqIQ5sKl4faL zWHVuN8eUGg= =Q0xz -----END PGP SIGNATURE-----