CVE-2017-11176: Use After Free

Published Jul 11, 2017
·
Updated

The mqnotify function in the Linux kernel through 4.11.9 does not set the sock pointer to NULL upon entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact.

Other sources

The mqnotify function in the Linux kernel through 4.11.9 does not set the sock pointer to NULL upon entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to possibly cause a situation where a value may be used after being freed (Use after free) which may lead to memory corruption or other unspecified other impact.

Upstream patch:

https://github.com/torvalds/linux/commit/f991af3daabaecff34684fd51fac80319d1baad1

Mitre advisory: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11176

What is use after free: https://access.redhat.com/use-after-free-flaw-type

— Red Hat

Affected Software

33 affected componentsFixes available
Linux Linux kernel<3.2.92
Linux Linux kernel>=3.3<3.16.47
Linux Linux kernel>=3.17<3.18.61
Linux Linux kernel>=3.19<4.1.43
Linux Linux kernel>=4.2<4.4.77
Linux Linux kernel>=4.5<4.9.38
Linux Linux kernel>=4.10<4.11.11
Linux Linux kernel>=4.12<4.12.2
Debian Debian Linux=8.0
Debian Debian Linux=9.0
ubuntu/linux<3.13.0-135.184
3.13.0-135.184
ubuntu/linux-lts-xenial<4.4.0-93.116~14.04.1
4.4.0-93.116~14.04.1
ubuntu/linux<4.4.0-93.116
4.4.0-93.116
ubuntu/linux-aws<4.4.0-1032.41
4.4.0-1032.41
ubuntu/linux-gcp<4.10.0-1008.8
4.10.0-1008.8
ubuntu/linux-gke<4.4.0-1028.28
4.4.0-1028.28
ubuntu/linux-hwe<4.13.0-32.35~16.04.1
4.13.0-32.35~16.04.1
ubuntu/linux-raspi2<4.4.0-1071.79
4.4.0-1071.79
ubuntu/linux-snapdragon<4.4.0-1073.78
4.4.0-1073.78
ubuntu/linux-azure-fde*
ubuntu/linux-azure-fde-5.15*
ubuntu/linux-gke*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-azure-6.11*
ubuntu/linux-gcp-6.11*
ubuntu/linux-hwe-6.11*
ubuntu/linux-lowlatency-hwe-6.11*
ubuntu/linux-raspi-realtime*
debian/linux
6.1.176-16.1.190-16.12.107-16.12.116-17.2.15-17.3.4-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 3.13.0-135.184
  2. Upgrade

    Upgrade ubuntu/linux-lts-xenial to a version that resolves this vulnerability.

    Fixed in 4.4.0-93.116~14.04.1
  3. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 4.4.0-93.116
  4. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.4.0-1032.41
  5. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 4.10.0-1008.8
  6. Upgrade

    Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.

    Fixed in 4.4.0-1028.28
  7. Upgrade

    Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.

    Fixed in 4.13.0-32.35~16.04.1
  8. Upgrade

    Upgrade ubuntu/linux-raspi2 to a version that resolves this vulnerability.

    Fixed in 4.4.0-1071.79
  9. Upgrade

    Upgrade ubuntu/linux-snapdragon to a version that resolves this vulnerability.

    Fixed in 4.4.0-1073.78
  10. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.4-1
  11. Upgrade

    Upgrade Linux kernel to a version that resolves this vulnerability.

    Patch f991af3daabaecff34684fd51fac80319d1baad1

Event History

Jul 11, 2017
CVE Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
CVE Published
via MITRE·11:00 PM
Data Sourced
via MITRE·11:00 PM
Description
Data Sourced
via NVD·11:29 PM
RemedyDescriptionSeverityWeaknessAffected Software
Jul 13, 2017
Data Sourced
via Red Hat·12:13 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is CVE-2017-11176?

CVE-2017-11176 is a vulnerability in the Linux kernel that allows attackers to cause a denial of service or have unspecified other impact.

2

How severe is CVE-2017-11176?

CVE-2017-11176 has a severity rating of medium.

3

What software versions are affected by CVE-2017-11176?

CVE-2017-11176 affects Linux kernel versions 3.13.0-135.184, 4.4.0-93.116, 4.10.0-38.42, and 4.13~.

4

How can I fix CVE-2017-11176?

To fix CVE-2017-11176, update your Linux kernel to a version that includes the patch.

5

Where can I find more information about CVE-2017-11176?

You can find more information about CVE-2017-11176 on the CVE website and the Red Hat website.

Company

Resources

Contact

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