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SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2017:0575-1)

Description

The SUSE Linux Enterprise 12 SP2 kernel was updated to 4.4.49 to receive various security and bugfixes. The following security bugs were fixed : - CVE-2016-7117: Use-after-free vulnerability in the __sys_recvmmsg function in net/socket.c in the Linux kernel allowed remote attackers to execute arbitrary code via vectors involving a recvmmsg system call that was mishandled during error processing (bnc#1003077). - CVE-2017-5576: Integer overflow in the vc4_get_bcl function in drivers/gpu/drm/vc4/vc4_gem.c in the VideoCore DRM driver in the Linux kernel allowed local users to cause a denial of service or possibly have unspecified other impact via a crafted size value in a VC4_SUBMIT_CL ioctl call (bnc#1021294). - CVE-2017-5577: The vc4_get_bcl function in drivers/gpu/drm/vc4/vc4_gem.c in the VideoCore DRM driver in the Linux kernel did not set an errno value upon certain overflow detections, which allowed local users to cause a denial of service (incorrect pointer dereference and OOPS) via inconsistent size values in a VC4_SUBMIT_CL ioctl call (bnc#1021294). - CVE-2017-5551: The simple_set_acl function in fs/posix_acl.c in the Linux kernel preserved the setgid bit during a setxattr call involving a tmpfs filesystem, which allowed local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. (bnc#1021258). - CVE-2017-2583: The load_segment_descriptor implementation in arch/x86/kvm/emulate.c in the Linux kernel improperly emulated a 'MOV SS, NULL selector' instruction, which allowed guest OS users to cause a denial of service (guest OS crash) or gain guest OS privileges via a crafted application (bnc#1020602). - CVE-2017-2584: arch/x86/kvm/emulate.c in the Linux kernel allowed local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free) via a crafted application that leverages instruction emulation for fxrstor, fxsave, sgdt, and sidt (bnc#1019851). - CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here' (bnc#1010933). - CVE-2016-9806: Race condition in the netlink_dump function in net/netlink/af_netlink.c in the Linux kernel allowed local users to cause a denial of service (double free) or possibly have unspecified other impact via a crafted application that made sendmsg system calls, leading to a free operation associated with a new dump that started earlier than anticipated (bnc#1013540). - CVE-2017-5897: fixed a bug in the Linux kernel IPv6 implementation which allowed remote attackers to trigger an out-of-bounds access, leading to a denial-of-service attack (bnc#1023762). - CVE-2017-5970: Fixed a possible denial-of-service that could have been triggered by sending bad IP options on a socket (bsc#1024938). - CVE-2017-5986: an application could have triggered a BUG_ON() in sctp_wait_for_sndbuf() if the socket TX buffer was full, a thread was waiting on it to queue more data, and meanwhile another thread peeled off the association being used by the first thread (bsc#1025235). The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


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