CVE-2017-2636
Published: 07 March 2017
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.
From the Ubuntu security team
Alexander Popov discovered that the N_HDLC line discipline implementation in the Linux kernel contained a double-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly gain administrative privileges.
Priority
High
CVSS 3 base score: 7.8
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
Patches: Introduced by be10eb7589337e5defbe214dae038a53dd21add8 Fixed by 82f2341c94d270421f383641b7cd670e474db56b |
||
|
linux-armadaxp Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-aws Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-azure Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-euclid Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-flo Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-gcp Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-gke Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-grouper Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-hwe Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-kvm Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-linaro-omap Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-linaro-shared Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-linaro-vexpress Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-lts-quantal Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-lts-raring Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-lts-saucy Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-maguro Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-mako Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-manta Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-oem Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-qcm-msm Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
|
linux-ti-omap4 Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.11~rc2)
|
Notes
| Author | Note |
|---|---|
| jdstrand | android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.10 and earlier preview kernels linux-lts-saucy no longer receives official support linux-lts-quantal no longer receives official support |
| tyhicks | all of our kernels are affected as CONFIG_N_HDLC=m is set in all releases |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2636
- http://www.openwall.com/lists/oss-security/2017/03/07/6
- https://ubuntu.com/security/notices/USN-3219-1
- https://ubuntu.com/security/notices/USN-3218-1
- https://ubuntu.com/security/notices/USN-3219-2
- https://ubuntu.com/security/notices/USN-3220-1
- https://ubuntu.com/security/notices/USN-3220-2
- https://ubuntu.com/security/notices/USN-3221-1
- https://ubuntu.com/security/notices/USN-3221-2
- https://ubuntu.com/security/notices/USN-3220-3
- NVD
- Launchpad
- Debian