medium
5.5
CWE
362 416 415
Advisory Published
CVE Published
Updated

CVE-2017-15129: Race Condition

First published: Thu Jan 04 2018(Updated: )

A use-after-free vulnerability was found in a network namespaces code affecting the Linux kernel since v4.0-rc1 through v4.15-rc5. The function get_net_ns_by_id() does not check for the net::count value after it has found a peer network in netns_ids idr which could lead to double free and memory corruption. This vulnerability could allow an unprivileged local user 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. References: <a href="https://marc.info/?l=linux-netdev&amp;m=151370451121029&amp;w=2">https://marc.info/?l=linux-netdev&amp;m=151370451121029&amp;w=2</a> <a href="https://marc.info/?t=151370468900001&amp;r=1&amp;w=2">https://marc.info/?t=151370468900001&amp;r=1&amp;w=2</a> (a whole thread) <a href="http://seclists.org/oss-sec/2018/q1/7">http://seclists.org/oss-sec/2018/q1/7</a> An upstream patch: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=21b5944350052d2583e82dd59b19a9ba94a007f0">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=21b5944350052d2583e82dd59b19a9ba94a007f0</a>

Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Linux Kernel<4.14.11
Linux Kernel>=4.0<4.14.11
Linux Kernel=4.15-rc1
Linux Kernel=4.15-rc2
Linux Kernel=4.15-rc3
Linux Kernel=4.15-rc4
Red Hat Fedora=27
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=17.10
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux Compute Node EUS=7.4
Red Hat Enterprise Linux Desktop=7.0
Red Hat Enterprise Linux Server EUS=7.4
Red Hat Enterprise Linux Server EUS=7.6
Red Hat Enterprise Linux Server EUS=7.7
Red Hat Enterprise Linux for IBM Z Systems=7.0
Red Hat Enterprise Linux for IBM Z Systems (s390x)=7.4
Red Hat Enterprise Linux for Power, big endian=7.0
Red Hat Enterprise Linux for Power, Big Endian EUS=7.4
Red Hat Enterprise Linux for Power, little endian - Extended Update Support=7.4
Red Hat Enterprise Linux for Real Time=7.0
Red Hat Enterprise Linux for Real Time for NFV=7
Red Hat Enterprise Linux for Scientific Computing=7.0
Red Hat Enterprise Linux Server=7.0
Red Hat Enterprise Linux Server=7.4
Red Hat Enterprise Linux Server=7.4
Red Hat Enterprise Linux Server=7.6
Red Hat Enterprise Linux Server=7.7
Red Hat Enterprise Linux Server Update Services for SAP Solutions=7.4
Red Hat Enterprise Linux Workstation=7.0
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.133-1
6.12.22-1

Remedy

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=21b5944350052d2583e82dd59b19a9ba94a007f0

Remedy

https://github.com/torvalds/linux/commit/21b5944350052d2583e82dd59b19a9ba94a007f0

Remedy

https://marc.info/?l=linux-netdev&m=151370451121029&w=2

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1531174

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Reference Links

Frequently Asked Questions

  • What is CVE-2017-15129?

    CVE-2017-15129 is a use-after-free vulnerability found in the Linux kernel before version 4.14.11.

  • How severe is CVE-2017-15129?

    CVE-2017-15129 has a severity level of medium.

  • How does CVE-2017-15129 impact Linux systems?

    CVE-2017-15129 can lead to a double free and may allow an attacker to execute arbitrary code or cause a denial of service.

  • Which Linux kernel versions are affected by CVE-2017-15129?

    Linux kernel versions before 4.14.11 are affected by CVE-2017-15129.

  • Is there a fix for CVE-2017-15129?

    Yes, updating the Linux kernel to version 4.14.11 or later fixes CVE-2017-15129.

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