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OpenAdvisories
Unscored Public exploit CVE-2017-2636 EUVD-2017-11797GHSA-gxfh-c6q2-wcm7

Race condition in drivers/tty/n_hdlc.c in the Linux kernel through 4.10.1 allows local users to gain privileges or cause a denial of servic…

Published Mar 7, 2017 · Updated Aug 5, 2024 · Assigned by redhat

Package: linux Package: linux Package: linux-aws Package: linux-gke Package: linux-hwe Package: linux-lts-xenial Package: linux-raspi2 Package: linux-snapdragon Ecosystem: Debian Ecosystem: Ubuntu

Description

Race condition in drivers/tty/n_hdlc.c in the Linux kernel through 4.10.1 allows local users to gain privileges or cause a denial of service (double free) by setting the HDLC line discipline.

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 14 linux 4.9.16-1 —
Debian 13 linux 4.9.16-1 —
Debian 12 linux 4.9.16-1 —
Debian 8 linux 3.16.39-1+deb8u2 DSA-3804-1
Debian 7 linux 3.2.86-1 DLA-849-1

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux 4.4.0-66.87 USN-3220-1
Ubuntu 16.04 LTS linux-aws 4.4.0-1007.16 USN-3220-3
Ubuntu 16.04 LTS linux-gke 4.4.0-1005.6 USN-3220-1
Ubuntu 16.04 LTS linux-hwe 4.8.0-41.44~16.04.1 USN-3221-2
Ubuntu 16.04 LTS linux-raspi2 4.4.0-1046.53 USN-3220-1
Ubuntu 16.04 LTS linux-snapdragon 4.4.0-1050.54 USN-3220-1
Ubuntu 14.04 LTS linux 3.13.0-112.159 USN-3219-1
Ubuntu 14.04 LTS linux-lts-xenial 4.4.0-66.87~14.04.1 USN-3220-2

Red Hat

Security tracker ↗
ReleasePackageFixed inAdvisory
RHEL 7 kernel-rt +10 3.10.0-514.16.1.rt56.437.el7 RHSA-2017:0931
RHEL 7 perf +18 3.10.0-514.16.1.el7 RHSA-2017:0933
RHEL 6 perf +16 2.6.32-696.1.1.el6 RHSA-2017:0892
Show 9 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Red Hat Rhel Mission Critical 6 perf +9 2.6.32-220.71.1.el6 RHSA-2017:1126
RHEL 7.2 EUS perf +18 3.10.0-327.53.1.el7 RHSA-2017:1125
RHEL 6.7 EUS perf +16 2.6.32-573.42.1.el6 RHSA-2017:1233
RHEL 6.6 TUS perf +10 2.6.32-504.60.2.el6 RHSA-2017:1488
RHEL 6.6 AUS perf +10 2.6.32-504.60.2.el6 RHSA-2017:1488
RHEL 6.5 TUS perf +10 2.6.32-431.80.1.el6 RHSA-2017:1232
RHEL 6.5 AUS perf +10 2.6.32-431.80.1.el6 RHSA-2017:1232
RHEL 6.4 AUS perf +9 2.6.32-358.78.1.el6 RHSA-2017:0986
Red Hat MRG 2 kernel-rt +10 1:3.10.0-514.rt56.219.el6rt RHSA-2017:0932

SUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
SLES 12 SP2 kernel-docs 4.4.49-92.14.3 SUSE-SU-2017:0864-1
SLES 12 SP2 kernel-syms +3 4.4.49-92.14.1 SUSE-SU-2017:0864-1
SLES 12 SP1 kernel-docs 3.12.69-60.64.35.3 SUSE-SU-2017:0865-1
SLES 12 SP1 kernel-xen +4 3.12.69-60.64.35.1 SUSE-SU-2017:0865-1
SLES 12 SP1 kgraft-patch-SLE12-SP1_Update_10 8-2.1 SUSE-SU-2017:2072-1
SLES 12 SP1 kgraft-patch-SLE12-SP1_Update_11 7-2.1 SUSE-SU-2017:2073-1
SLES 12 SP1 kgraft-patch-SLE12-SP1_Update_12 6-2.1 SUSE-SU-2017:2049-1
SLES 12 SP1 kgraft-patch-SLE12-SP1_Update_13 5-2.1 SUSE-SU-2017:2092-1
SLES 12 SP1 kgraft-patch-SLE12-SP1_Update_7 +1 10-2.1 SUSE-SU-2017:2088-1, SUSE-SU-2017:2060-1
SLES 12 SP1 kgraft-patch-SLE12-SP1_Update_9 9-2.1 SUSE-SU-2017:2061-1
SLES 12 kernel-ec2 +3 3.12.61-52.69.2 SUSE-SU-2017:0866-1, SUSE-SU-2017:0865-1
SLES 12 kernel-syms 3.12.61-52.69.1 SUSE-SU-2017:0866-1
SLES 12 kgraft-patch-SLE12_Update_16 8-2.1 SUSE-SU-2017:2099-1
SLES 12 kgraft-patch-SLE12_Update_17 +1 7-2.1 SUSE-SU-2017:2095-1, SUSE-SU-2017:2093-1
SLES 12 kgraft-patch-SLE12_Update_19 6-2.1 SUSE-SU-2017:2096-1
SLES 12 kgraft-patch-SLE12_Update_20 1-2.3 SUSE-SU-2017:0866-1
SLES 11 SP4 kernel-docs 3.0.101-97.3 SUSE-SU-2017:0912-1
SLES 11 SP4 kernel-ec2 +8 3.0.101-97.1 SUSE-SU-2025:0152-1, SUSE-SU-2017:0912-1
SLES 11 SP3 kernel-ec2 +7 3.0.101-0.47.99.1 SUSE-SU-2017:0913-1
Show 11 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 12 SP2 kernel-syms +2 4.4.49-92.14.1 SUSE-SU-2017:0864-1
SLES for SAP 12 SP1 kernel-xen +3 3.12.69-60.64.35.1 SUSE-SU-2017:0865-1
SLES for SAP 12 SP1 kgraft-patch-SLE12-SP1_Update_10 8-2.1 SUSE-SU-2017:2072-1
SLES for SAP 12 SP1 kgraft-patch-SLE12-SP1_Update_11 7-2.1 SUSE-SU-2017:2073-1
SLES for SAP 12 SP1 kgraft-patch-SLE12-SP1_Update_12 6-2.1 SUSE-SU-2017:2049-1
SLES for SAP 12 SP1 kgraft-patch-SLE12-SP1_Update_13 5-2.1 SUSE-SU-2017:2092-1
SLES for SAP 12 SP1 kgraft-patch-SLE12-SP1_Update_7 +1 10-2.1 SUSE-SU-2017:2088-1, SUSE-SU-2017:2060-1
SLES for SAP 12 SP1 kgraft-patch-SLE12-SP1_Update_9 9-2.1 SUSE-SU-2017:2061-1
SLES for SAP 12 kernel-syms 3.12.61-52.69.1 SUSE-SU-2017:0866-1
SLES for SAP 12 kernel-xen +2 3.12.61-52.69.2 SUSE-SU-2017:0866-1
SLES for SAP 12 kgraft-patch-SLE12_Update_16 8-2.1 SUSE-SU-2017:2099-1
SLES for SAP 12 kgraft-patch-SLE12_Update_17 +1 7-2.1 SUSE-SU-2017:2095-1, SUSE-SU-2017:2093-1
SLES for SAP 12 kgraft-patch-SLE12_Update_19 6-2.1 SUSE-SU-2017:2096-1
SLES for SAP 12 kgraft-patch-SLE12_Update_20 1-2.3 SUSE-SU-2017:0866-1
SLES for SAP 11 SP4 kernel-ec2 +8 3.0.101-97.1 SUSE-SU-2017:0912-1
SLE Real Time 12 SP2 kernel-rt +3 4.4.74-7.10.1 SUSE-SU-2017:1990-1
SLE Real Time 11 SP4 kernel-rt +3 3.0.101.rt130-69.5.1 SUSE-SU-2017:2342-1
SLE Live Patching 12 kgraft-patch-SLE12-SP2_Update_0 8-18.7.1 SUSE-SU-2017:2062-1
SLE Live Patching 12 kgraft-patch-SLE12-SP2_Update_1 8-2.1 SUSE-SU-2017:2067-1
SLE Live Patching 12 kgraft-patch-SLE12-SP2_Update_2 +2 7-2.1 SUSE-SU-2017:2068-1, SUSE-SU-2017:2065-1, SUSE-SU-2017:2043-1
SLE Live Patching 12 kgraft-patch-SLE12-SP2_Update_5 5-2.1 SUSE-SU-2017:2063-1
SLE Live Patching 12 kgraft-patch-SLE12-SP2_Update_6 +1 1-2.1 SUSE-SU-2017:0865-1, SUSE-SU-2017:0864-1
SUSE OpenStack Cloud 5 kernel-ec2 +6 3.0.101-0.47.99.1 SUSE-SU-2017:0913-1
SUSE Manager Proxy 2.1 kernel-ec2 +6 3.0.101-0.47.99.1 SUSE-SU-2017:0913-1
SUSE Manager 2.1 kernel-ec2 +6 3.0.101-0.47.99.1 SUSE-SU-2017:0913-1
SUSE Linux Enterprise Point of Sale 11 SP3 kernel-ec2 +6 3.0.101-0.47.99.1 SUSE-SU-2017:0913-1

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 7 dtrace-modules-3.8.13-118.17.4.el6uek 0.4.5-3.el6 ELSA-2017-3534
Oracle Linux 7 dtrace-modules-3.8.13-118.17.4.el7uek 0.4.5-3.el7 ELSA-2017-3534
Oracle Linux 7 dtrace-modules-4.1.12-61.1.33.el6uek 0.5.3-2.el6 ELSA-2017-3533
Oracle Linux 7 dtrace-modules-4.1.12-61.1.33.el7uek 0.5.3-2.el7 ELSA-2017-3533
Oracle Linux 7 kernel-uek +5 3.8.13-118.17.4.el7uek ELSA-2017-3534, ELSA-2017-3533
Oracle Linux 7 perf +11 3.10.0-514.16.1.el7 ELSA-2017-0933

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • alexzorin/cve-2017-2636-el ★ 1 · Mar 9, 2017

    Ansible role for workaround for CVE-2017-2636 (Red Hat) - https://access.redhat.com/security/cve/CVE-2017-2636

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 46

References