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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2233 Important: kernel-rt security and bug fix update 7 September 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel-rt Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Impact/Access: Root Compromise -- Existing Account Access Privileged Data -- Existing Account Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-9077 CVE-2017-9076 CVE-2017-9075 CVE-2017-9074 CVE-2017-8890 CVE-2017-8797 CVE-2017-7889 CVE-2017-7533 CVE-2017-7187 CVE-2017-6951 CVE-2017-6001 CVE-2017-5970 CVE-2017-2671 CVE-2016-10088 CVE-2016-9806 CVE-2016-9685 CVE-2016-9604 CVE-2016-9576 CVE-2016-8645 CVE-2016-7097 CVE-2016-7042 CVE-2015-8839 Reference: ASB-2017.0141 ASB-2017.0032 ESB-2017.2220 ESB-2017.2214 Original Bulletin: https://access.redhat.com/errata/RHSA-2017:2669 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2017:2669-01 Product: Red Hat Enterprise MRG for RHEL-6 Advisory URL: https://access.redhat.com/errata/RHSA-2017:2669 Issue date: 2017-09-06 CVE Names: CVE-2015-8839 CVE-2016-10088 CVE-2016-7042 CVE-2016-7097 CVE-2016-8645 CVE-2016-9576 CVE-2016-9604 CVE-2016-9685 CVE-2016-9806 CVE-2017-2671 CVE-2017-5970 CVE-2017-6001 CVE-2017-6951 CVE-2017-7187 CVE-2017-7533 CVE-2017-7889 CVE-2017-8797 CVE-2017-8890 CVE-2017-9074 CVE-2017-9075 CVE-2017-9076 CVE-2017-9077 ===================================================================== 1. Summary: An update for kernel-rt is now available for Red Hat Enterprise MRG 2. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: MRG Realtime for RHEL 6 Server v.2 - noarch, x86_64 3. Description: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * A race condition was found in the Linux kernel, present since v3.14-rc1 through v4.12. The race happens between threads of inotify_handle_event() and vfs_rename() while running the rename operation against the same file. As a result of the race the next slab data or the slab's free list pointer can be corrupted with attacker-controlled data, which may lead to the privilege escalation. (CVE-2017-7533, Important) * It was found that the NFSv4 server in the Linux kernel did not properly validate layout type when processing NFSv4 pNFS LAYOUTGET and GETDEVICEINFO operands. A remote attacker could use this flaw to soft-lockup the system and thus cause denial of service. (CVE-2017-8797, Important) This update also fixes multiple Moderate and Low impact security issues: CVE-2017-8797 CVE-2015-8839 CVE-2016-9576 CVE-2016-7042 CVE-2016-7097 CVE-2016-8645 CVE-2016-9576 CVE-2016-9806 CVE-2016-10088 CVE-2017-2671 CVE-2017-5970 CVE-2017-6001 CVE-2017-6951 CVE-2017-7187 CVE-2017-7889 CVE-2017-8890 CVE-2017-9074 CVE-2017-8890 CVE-2017-9075 CVE-2017-8890 CVE-2017-9076 CVE-2017-8890 CVE-2017-9077 CVE-2016-9604 CVE-2016-9685 Documentation for these issues are available from the Technical Notes document linked to in the References section. Red Hat would like to thank Leilei Lin (Alibaba Group), Fan Wu (The University of Hong Kong), and Shixiong Zhao (The University of Hong Kong) for reporting CVE-2017-7533 and Marco Grassi for reporting CVE-2016-8645. The CVE-2016-7042 issue was discovered by Ondrej Kozina (Red Hat); the CVE-2016-7097 issue was discovered by Andreas Gruenbacher (Red Hat) and Jan Kara (SUSE); the CVE-2016-9604 issue was discovered by David Howells (Red Hat); and the CVE-2016-9685 issue was discovered by Qian Cai (Red Hat). 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1323577 - CVE-2015-8839 kernel: ext4 filesystem page fault race condition with fallocate call. 1368938 - CVE-2016-7097 kernel: Setting a POSIX ACL via setxattr doesn't clear the setgid bit 1373966 - CVE-2016-7042 kernel: Stack corruption while reading /proc/keys when gcc stack protector is enabled 1389433 - CVE-2016-9604 kernel: security: The built-in keyrings for security tokens can be joined as a session and then modified by the root user 1393904 - CVE-2016-8645 kernel: a BUG() statement can be hit in net/ipv4/tcp_input.c 1396941 - CVE-2016-9685 kernel: Memory leaks in xfs_attr_list.c error paths 1401502 - CVE-2016-9806 kernel: netlink: double-free in netlink_dump 1403145 - CVE-2016-9576 kernel: Use after free in SCSI generic device interface 1412210 - CVE-2016-10088 kernel: Use after free in SCSI generic device interface (CVE-2016-9576 regression) 1421638 - CVE-2017-5970 kernel: ipv4: Invalid IP options could cause skb->dst drop 1422825 - CVE-2017-6001 kernel: Race condition between multiple sys_perf_event_open() calls 1433252 - CVE-2017-6951 kernel: NULL pointer dereference in keyring_search_aux function 1434327 - CVE-2017-7187 kernel: scsi: Stack-based buffer overflow in sg_ioctl function 1436649 - CVE-2017-2671 kernel: ping socket / AF_LLC connect() sin_family race 1444493 - CVE-2017-7889 kernel: mm subsystem does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism 1450972 - CVE-2017-8890 kernel: Double free in the inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c 1452679 - CVE-2017-9074 kernel: net: IPv6 fragmentation implementation of nexthdr field may be associated with an invalid option 1452688 - CVE-2017-9076 kernel: net: IPv6 DCCP implementation mishandles inheritance 1452691 - CVE-2017-9075 kernel: net: sctp_v6_create_accept_sk function mishandles inheritance 1452744 - CVE-2017-9077 kernel: net: tcp_v6_syn_recv_sock function mishandles inheritance 1466329 - CVE-2017-8797 kernel: NFSv4 server does not properly validate layout type when processing NFSv4 pNFS LAYOUTGET operand 1468283 - CVE-2017-7533 kernel: a race between inotify_handle_event() and sys_rename() 1479016 - update the MRG 2.5.z 3.10 kernel-rt sources 6. Package List: MRG Realtime for RHEL 6 Server v.2: Source: kernel-rt-3.10.0-693.2.1.rt56.585.el6rt.src.rpm noarch: kernel-rt-doc-3.10.0-693.2.1.rt56.585.el6rt.noarch.rpm kernel-rt-firmware-3.10.0-693.2.1.rt56.585.el6rt.noarch.rpm x86_64: kernel-rt-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-debug-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-debug-devel-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-debuginfo-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-devel-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-trace-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-trace-devel-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-vanilla-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-vanilla-debuginfo-3.10.0-693.2.1.rt56.585.el6rt.x86_64.rpm kernel-rt-vanilla-devel-3.10.0-693.2.1.rt56.585.el6rt.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-2015-8839 https://access.redhat.com/security/cve/CVE-2016-10088 https://access.redhat.com/security/cve/CVE-2016-7042 https://access.redhat.com/security/cve/CVE-2016-7097 https://access.redhat.com/security/cve/CVE-2016-8645 https://access.redhat.com/security/cve/CVE-2016-9576 https://access.redhat.com/security/cve/CVE-2016-9604 https://access.redhat.com/security/cve/CVE-2016-9685 https://access.redhat.com/security/cve/CVE-2016-9806 https://access.redhat.com/security/cve/CVE-2017-2671 https://access.redhat.com/security/cve/CVE-2017-5970 https://access.redhat.com/security/cve/CVE-2017-6001 https://access.redhat.com/security/cve/CVE-2017-6951 https://access.redhat.com/security/cve/CVE-2017-7187 https://access.redhat.com/security/cve/CVE-2017-7533 https://access.redhat.com/security/cve/CVE-2017-7889 https://access.redhat.com/security/cve/CVE-2017-8797 https://access.redhat.com/security/cve/CVE-2017-8890 https://access.redhat.com/security/cve/CVE-2017-9074 https://access.redhat.com/security/cve/CVE-2017-9075 https://access.redhat.com/security/cve/CVE-2017-9076 https://access.redhat.com/security/cve/CVE-2017-9077 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/articles/3173821 8. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWbCElYx+lLeg9Ub1AQiZbg/9F76DI4dpi/c2zASwY2v66uQDoHlmYEcG oWY4M53gCBgkL2a4Oc2P7/PNyfW9U5dXGd0pJeuDe4209PD7d2ZD9D2Epmwd3bVY 1k/L5r/ZVWw6h+8slyTq3bxlZXcOmmzcSrC4FU8tsyPXQF2KXX1Dcu083YXJ2SzO 80Q3MEHwHrPAmeUGuzAbehtkjiEdk5BrrBuuv2qB+IgTx9cdtJW/NQGk2uSCqcXV HCtMOTzDS9D9evowimaLsBph4mpoJkLSBxjRJvwNbn5F60T8tgzIapT03iX3o4eL siSkufj1GPc+37MHEf3H4lklMFSnfQIXZFbEr+qoVhuCPiOjWsqQuB8Sy/jX9ZNQ ClyizHFEsj82l1g4XrG3QmsrF3v3lHOd8mgQFFDlPlNVvateSa7Mwq76VG3TqLsI wVUDN+WpIR83r8wVpENgwlTneSuCv5bDwL9ylfMF0/5NHPStl9K8OcVOXeW5vGe1 sJabGle7ToboHReiTtGu41OvcXV0lkWkNQ0Bh6Y7Za5D3/HScADulxk4mTk1ZUCr i/5L/H0fcd2kfZkTQTK+DU8PBG3ice7/jbbabsr+/pOHLzaAIhYjue0eJtAEJl0i L0IjU2ielx7cZNer5AtpmwUCLvq3IDyIKAyHGH1JlBGbo8WUyCJ1v121PnL3sz1n NuiHPoOzu90= =aCBi -----END PGP SIGNATURE-----