CVE-2017-16995
Published: 27 December 2017
The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.4 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging incorrect sign extension.
From the Ubuntu security team
Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
Priority
CVSS 3 base score: 7.8
Status
Package | Release | Status |
---|---|---|
linux Launchpad, Ubuntu, Debian |
artful |
Released
(4.13.0-25.29)
|
bionic |
Not vulnerable
(4.13.0-25.29)
|
|
precise |
Not vulnerable
|
|
trusty |
Not vulnerable
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.4.0-119.143)
|
|
zesty |
Ignored
(reached end-of-life)
|
|
linux-armadaxp Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-aws Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
precise |
Does not exist
|
|
trusty |
Released
(4.4.0-1016.16)
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.4.0-1054.63)
|
|
zesty |
Does not exist
|
|
linux-azure Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
precise |
Does not exist
|
|
trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.13.0-1005.7)
|
|
zesty |
Does not exist
|
|
linux-euclid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.4.0-9026.28)
|
|
zesty |
Does not exist
|
|
linux-flo Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Ignored
(abandoned)
|
|
zesty |
Does not exist
|
|
linux-gcp Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.13.0-1006.9)
|
|
zesty |
Does not exist
|
|
linux-gke Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Not vulnerable
|
|
zesty |
Does not exist
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Not vulnerable
|
|
zesty |
Ignored
(reached end-of-life)
|
|
linux-grouper Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-hwe Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.13.0-26.29~16.04.2)
|
|
zesty |
Does not exist
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.18.0-8.9~18.04.1)
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.13.0-26.29~16.04.2)
|
|
zesty |
Does not exist
|
|
linux-kvm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.4.0-1020.25)
|
|
zesty |
Does not exist
|
|
linux-linaro-omap Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-linaro-shared Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-linaro-vexpress Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-quantal Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Ignored
(end-of-life)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-raring Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Ignored
(end-of-life)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-saucy Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Ignored
(end-of-life)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [out of standard support])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [was needs-triage now end-of-life])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [out of standard support])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Released
(4.4.0-119.143~14.04.1)
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-maguro Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-mako Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Ignored
(abandoned)
|
|
zesty |
Does not exist
|
|
linux-manta Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-oem Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.15.0-1002.3)
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.13.0-1015.16)
|
|
zesty |
Does not exist
|
|
linux-qcm-msm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
artful |
Released
(4.13.0-1011.11)
|
bionic |
Not vulnerable
(4.15.0-1006.7)
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.4.0-1086.94)
|
|
zesty |
Ignored
(reached end-of-life)
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
artful |
Released
(4.4.0-1088.93)
|
bionic |
Not vulnerable
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.4.0-1088.93)
|
|
zesty |
Ignored
(reached end-of-life)
|
|
linux-ti-omap4 Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
Notes
Author | Note |
---|---|
tyhicks | Mitigation for this vulnerability is available by setting the kernel.unprivileged_bpf_disabled sysctl to 1: $ sudo sysctl kernel.unprivileged_bpf_disabled=1 $ echo kernel.unprivileged_bpf_disabled=1 | \ sudo tee /etc/sysctl.d/90-CVE-2017-16995-CVE-2017-16996.conf |
smb | Current breaks sha1 (taken from the fix patch) only makes 4.14+ affected. However upstream stable backported a fix for it. So I will modify the breaks sha1 to point to when the surrounding code was added. |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16995
- http://openwall.com/lists/oss-security/2017/12/21/2
- https://ubuntu.com/security/notices/USN-3523-1
- https://ubuntu.com/security/notices/USN-3523-2
- https://ubuntu.com/security/notices/USN-3523-3
- https://ubuntu.com/security/notices/USN-3619-1
- https://ubuntu.com/security/notices/USN-3619-2
- https://ubuntu.com/security/notices/USN-3633-1
- NVD
- Launchpad
- Debian