SUSE-SU-2017:2067-1

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SUSE-SU-2017:2067-1

Summary: Security update for Linux Kernel Live Patch 1 for SLE 12 SP2

Details: This update for the Linux Kernel 4.4.21-81 fixes several issues. The following security bugs were fixed: - CVE-2017-7533: A bug in inotify code allowed local users to escalate privilege (bsc#1050751). - CVE-2017-8797: The NFSv4 server in the Linux kernel did not properly validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO or LAYOUTGET operand in a UDP packet from a remote attacker. This type value is uninitialized upon encountering certain error conditions. This value is used as an array index for dereferencing, which leads to an OOPS and eventually a DoS of knfsd and a soft-lockup of the whole system (bsc#1046202) - CVE-2017-7645: The NFSv2/NFSv3 server in the nfsd subsystem in the Linux kernel allowed remote attackers to cause a denial of service (system crash) via a long RPC reply, related to net/sunrpc/svc.c, fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c (bsc#1046191). - CVE-2017-2636: Race condition in drivers/tty/n_hdlc.c in the Linux kernel allowed local users to gain privileges or cause a denial of service (double free) by setting the HDLC line discipline (bsc#1027575). - CVE-2017-9242: The __ip6_append_data function in net/ipv6/ip6_output.c in the Linux kernel is too late in checking whether an overwrite of an skb data structure may occur, which allowed local users to cause a denial of service (system crash) via crafted system calls (bsc#1042892). - CVE-2017-9077: The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel mishandled inheritance, which allowed local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890 (bsc#1042364). - CVE-2017-8890: The inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c in the Linux kernel allowed attackers to cause a denial of service (double free) or possibly have unspecified other impact by leveraging use of the accept system call (bsc#1038564).

References: https://www.suse.com/support/update/announcement/2017/suse-su-20172067-1/, https://bugzilla.suse.com/1027575, https://bugzilla.suse.com/1038564, https://bugzilla.suse.com/1042364, https://bugzilla.suse.com/1042892, https://bugzilla.suse.com/1046191, https://bugzilla.suse.com/1046202, https://bugzilla.suse.com/1046206, https://bugzilla.suse.com/1050751, https://www.suse.com/security/cve/CVE-2017-2636, https://www.suse.com/security/cve/CVE-2017-7533, https://www.suse.com/security/cve/CVE-2017-7645, https://www.suse.com/security/cve/CVE-2017-8797, https://www.suse.com/security/cve/CVE-2017-8890, https://www.suse.com/security/cve/CVE-2017-9077, https://www.suse.com/security/cve/CVE-2017-9242