Vulmon Recent Vulnerabilities Research Posts Trends Blog About Contact

ALAS-2017-846

Related Vulnerabilities: CVE-2017-8890   CVE-2017-9059   CVE-2017-9074   CVE-2017-9075   CVE-2017-9076   CVE-2017-9077   CVE-2017-9242  

Module reference leak due to improper shut down of callback channel on umount:The NFSv4 implementation in the Linux kernel through 4.11.1 allows local users to cause a denial of service (resource consumption) by leveraging improper channel callback shutdown when unmounting an NFSv4 filesystem, aka a "module reference and kernel daemon" leak. (CVE-2017-9059) Incorrect overwrite check in __ip6_append_data():The __ip6_append_data function in net/ipv6/ip6_output.c in the Linux kernel through 4.11.3 is too late in checking whether an overwrite of an skb data structure may occur, which allows local users to cause a denial of service (system crash) via crafted system calls. (CVE-2017-9242) Double free in the inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c:The inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c in the Linux kernel allows attackers to cause a denial of service (double free) or possibly have unspecified other impact by leveraging use of the accept system call. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely. (CVE-2017-8890) net: tcp_v6_syn_recv_sock function mishandles inheritance:The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel mishandles inheritance, which allows 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. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely. (CVE-2017-9077) net: IPv6 DCCP implementation mishandles inheritanceThe IPv6 DCCP implementation in the Linux kernel mishandles inheritance, which allows 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. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely. (CVE-2017-9076) net: sctp_v6_create_accept_sk function mishandles inheritance:The sctp_v6_create_accept_sk function in net/sctp/ipv6.c in the Linux kernel mishandles inheritance, which allows 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. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.(CVE-2017-9075) net: IPv6 fragmentation implementation of nexthdr field may be associated with an invalid option:The IPv6 fragmentation implementation in the Linux kernel does not consider that the nexthdr field may be associated with an invalid option, which allows local users to cause a denial of service (out-of-bounds read and BUG) or possibly have unspecified other impact via crafted socket and send system calls. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely. (CVE-2017-9074)

Source

ALAS-2017-846

Amazon Linux AMI Security Advisory: ALAS-2017-846
Advisory Release Date: 2017-06-22 19:10 Pacific
Advisory Updated Date: 2017-06-22 22:52 Pacific
Severity: Medium
Issue Overview:

Module reference leak due to improper shut down of callback channel on umount:
The NFSv4 implementation in the Linux kernel through 4.11.1 allows local users to cause a denial of service (resource consumption) by leveraging improper channel callback shutdown when unmounting an NFSv4 filesystem, aka a "module reference and kernel daemon" leak. (CVE-2017-9059)

Incorrect overwrite check in __ip6_append_data():
The __ip6_append_data function in net/ipv6/ip6_output.c in the Linux kernel through 4.11.3 is too late in checking whether an overwrite of an skb data structure may occur, which allows local users to cause a denial of service (system crash) via crafted system calls. (CVE-2017-9242)

Double free in the inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c:
The inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c in the Linux kernel allows attackers to cause a denial of service (double free) or possibly have unspecified other impact by leveraging use of the accept system call. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely. (CVE-2017-8890)

net: tcp_v6_syn_recv_sock function mishandles inheritance:
The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel mishandles inheritance, which allows 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. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely. (CVE-2017-9077)

net: IPv6 DCCP implementation mishandles inheritance
The IPv6 DCCP implementation in the Linux kernel mishandles inheritance, which allows 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. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely. (CVE-2017-9076)

net: sctp_v6_create_accept_sk function mishandles inheritance:
The sctp_v6_create_accept_sk function in net/sctp/ipv6.c in the Linux kernel mishandles inheritance, which allows 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. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.(CVE-2017-9075)

net: IPv6 fragmentation implementation of nexthdr field may be associated with an invalid option:
The IPv6 fragmentation implementation in the Linux kernel does not consider that the nexthdr field may be associated with an invalid option, which allows local users to cause a denial of service (out-of-bounds read and BUG) or possibly have unspecified other impact via crafted socket and send system calls. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely. (CVE-2017-9074)


Affected Packages:

kernel


Issue Correction:
Run yum update kernel to update your system.

New Packages:
i686:
    kernel-devel-4.9.32-15.41.amzn1.i686
    kernel-debuginfo-4.9.32-15.41.amzn1.i686
    kernel-tools-devel-4.9.32-15.41.amzn1.i686
    kernel-debuginfo-common-i686-4.9.32-15.41.amzn1.i686
    kernel-tools-4.9.32-15.41.amzn1.i686
    kernel-4.9.32-15.41.amzn1.i686
    kernel-tools-debuginfo-4.9.32-15.41.amzn1.i686
    perf-4.9.32-15.41.amzn1.i686
    perf-debuginfo-4.9.32-15.41.amzn1.i686
    kernel-headers-4.9.32-15.41.amzn1.i686

noarch:
    kernel-doc-4.9.32-15.41.amzn1.noarch

src:
    kernel-4.9.32-15.41.amzn1.src

x86_64:
    kernel-tools-devel-4.9.32-15.41.amzn1.x86_64
    kernel-tools-debuginfo-4.9.32-15.41.amzn1.x86_64
    kernel-headers-4.9.32-15.41.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.9.32-15.41.amzn1.x86_64
    kernel-debuginfo-4.9.32-15.41.amzn1.x86_64
    kernel-4.9.32-15.41.amzn1.x86_64
    perf-debuginfo-4.9.32-15.41.amzn1.x86_64
    kernel-devel-4.9.32-15.41.amzn1.x86_64
    kernel-tools-4.9.32-15.41.amzn1.x86_64
    perf-4.9.32-15.41.amzn1.x86_64

Vulmon Search

Vulmon Search is a vulnerability search engine. It gives comprehensive vulnerability information through a very simple user interface.

About

Home Recent Vulnerabilities Research Posts Trends Blog About Contact

Products

Vulmon Search Vulmon Research Vulmon Alerts Vulmap

Connect

Twitter Reddit Linkedin Facebook

Vulnerability Notification Service
You don’t have to wait for vulnerability scanning results
Get Started