Test ID:	1.3.6.1.4.1.25623.1.0.882747
Category:	CentOS Local Security Checks
Title:	CentOS Update for kernel CESA-2017:1615 centos7
Summary:	Check the version of kernel
Description:	Summary: Check the version of kernel Vulnerability Insight: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * A flaw was found in the way Linux kernel allocates heap memory to build the scattergather list from a fragment list(skb_shinfo(skb)- frag_list) in the socket buffer(skb_buff). The heap overflow occurred if 'MAX_SKB_FRAGS + 1' parameter and 'NETIF_F_FRAGLIST' feature were used together. A remote user or process could use this flaw to potentially escalate their privilege on a system. (CVE-2017-7477, Important) * The NFS2/3 RPC client could send long arguments to the NFS server. These encoded arguments are stored in an array of memory pages, and accessed using pointer variables. Arbitrarily long arguments could make these pointers point outside the array and cause an out-of-bounds memory access. A remote user or program could use this flaw to crash the kernel (denial of service). (CVE-2017-7645, Important) * The NFSv2 and NFSv3 server implementations in the Linux kernel through 4.10.13 lacked certain checks for the end of a buffer. A remote attacker could trigger a pointer-arithmetic error or possibly cause other unspecified impacts using crafted requests related to fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c. (CVE-2017-7895, Important) * The Linux kernel built with the Kernel-based Virtual Machine (CONFIG_KVM) support was vulnerable to an incorrect segment selector(SS) value error. The error could occur while loading values into the SS register in long mode. A user or process inside a guest could use this flaw to crash the guest, resulting in DoS or potentially escalate their privileges inside the guest. (CVE-2017-2583, Moderate) * A flaw was found in the Linux kernel's handling of packets with the URG flag. Applications using the splice() and tcp_splice_read() functionality could allow a remote attacker to force the kernel to enter a condition in which it could loop indefinitely. (CVE-2017-6214, Moderate) Red Hat would like to thank Ari Kauppi for reporting CVE-2017-7895 and Xiaohan Zhang (Huawei Inc.) for reporting CVE-2017-2583. Bug Fix(es): * Previously, the reserved-pages counter (HugePages_Rsvd) was bigger than the total-pages counter (HugePages_Total) in the /proc/meminfo file, and HugePages_Rsvd underflowed. With this update, the HugeTLB feature of the Linux kernel has been fixed, and HugePages_Rsvd underflow no longer occurs. (BZ#1445184) * If a directory on a NFS client was modified while being listed, the NFS client could restart the directory listing multiple times. Consequently, the performance of listing the directory was sub-optimal. With this update, the restarting of the di ... Description truncated, please see the referenced URL(s) for more information. Affected Software/OS: kernel on CentOS 7 Solution: Please Install the Updated Packages. CVSS Score: 10.0 CVSS Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2017-2583 95673 http://www.securityfocus.com/bid/95673 DSA-3791 http://www.debian.org/security/2017/dsa-3791 RHSA-2017:1615 https://access.redhat.com/errata/RHSA-2017:1615 RHSA-2017:1616 https://access.redhat.com/errata/RHSA-2017:1616 USN-3754-1 https://usn.ubuntu.com/3754-1/ [oss-security] 20170119 CVE-2017-2583 Kernel: Kvm: vmx/svm potential privilege escalation inside guest http://www.openwall.com/lists/oss-security/2017/01/19/2 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=33ab91103b3415e12457e3104f0e4517ce12d0f3 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.5 https://bugzilla.redhat.com/show_bug.cgi?id=1414735 https://github.com/torvalds/linux/commit/33ab91103b3415e12457e3104f0e4517ce12d0f3 Common Vulnerability Exposure (CVE) ID: CVE-2017-6214 BugTraq ID: 96421 http://www.securityfocus.com/bid/96421 Debian Security Information: DSA-3804 (Google Search) http://www.debian.org/security/2017/dsa-3804 RedHat Security Advisories: RHSA-2017:1372 https://access.redhat.com/errata/RHSA-2017:1372 RedHat Security Advisories: RHSA-2017:1615 RedHat Security Advisories: RHSA-2017:1616 RedHat Security Advisories: RHSA-2017:1647 https://access.redhat.com/errata/RHSA-2017:1647 http://www.securitytracker.com/id/1037897 Common Vulnerability Exposure (CVE) ID: CVE-2017-7477 1038500 http://www.securitytracker.com/id/1038500 98014 http://www.securityfocus.com/bid/98014 https://bugzilla.redhat.com/show_bug.cgi?id=1445207 https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=4d6fa57b4dab0d77f4d8e9d9c73d1e63f6fe8fee https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=5294b83086cc1c35b4efeca03644cf9d12282e5b Common Vulnerability Exposure (CVE) ID: CVE-2017-7645 BugTraq ID: 97950 http://www.securityfocus.com/bid/97950 Debian Security Information: DSA-3886 (Google Search) http://www.debian.org/security/2017/dsa-3886 https://marc.info/?l=linux-nfs&m=149218228327497&w=2 https://marc.info/?l=linux-nfs&m=149247516212924&w=2 RedHat Security Advisories: RHSA-2018:1319 https://access.redhat.com/errata/RHSA-2018:1319 Common Vulnerability Exposure (CVE) ID: CVE-2017-7895 BugTraq ID: 98085 http://www.securityfocus.com/bid/98085 RedHat Security Advisories: RHSA-2017:1715 https://access.redhat.com/errata/RHSA-2017:1715 RedHat Security Advisories: RHSA-2017:1723 https://access.redhat.com/errata/RHSA-2017:1723 RedHat Security Advisories: RHSA-2017:1766 https://access.redhat.com/errata/RHSA-2017:1766 RedHat Security Advisories: RHSA-2017:1798 https://access.redhat.com/errata/RHSA-2017:1798 RedHat Security Advisories: RHSA-2017:2412 https://access.redhat.com/errata/RHSA-2017:2412 RedHat Security Advisories: RHSA-2017:2428 https://access.redhat.com/errata/RHSA-2017:2428 RedHat Security Advisories: RHSA-2017:2429 https://access.redhat.com/errata/RHSA-2017:2429 RedHat Security Advisories: RHSA-2017:2472 https://access.redhat.com/errata/RHSA-2017:2472 RedHat Security Advisories: RHSA-2017:2732 https://access.redhat.com/errata/RHSA-2017:2732
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