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.
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. |
Priority
Status
Package | Release | Status |
---|---|---|
linux-flo Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc5)
|
bionic |
Does not exist
|
|
artful |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
xenial |
Ignored
(abandoned)
|
|
zesty |
Does not exist
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
artful |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-aws Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc5)
|
bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
artful |
Does not exist
|
|
trusty |
Released
(4.4.0-1016.16)
|
|
xenial |
Released
(4.4.0-1054.63)
|
|
zesty |
Does not exist
|
|
linux-hwe Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc5)
|
bionic |
Not vulnerable
|
|
artful |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Released
(4.13.0-26.29~16.04.2)
|
|
zesty |
Does not exist
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc5)
|
bionic |
Released
(4.18.0-8.9~18.04.1)
|
|
artful |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Released
(4.13.0-26.29~16.04.2)
|
|
zesty |
Does not exist
|
|
linux-gke Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc5)
|
bionic |
Does not exist
|
|
artful |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Not vulnerable
|
|
zesty |
Does not exist
|
|
linux-azure Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc5)
|
bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
artful |
Does not exist
|
|
trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
xenial |
Released
(4.13.0-1005.7)
|
|
zesty |
Does not exist
|
|
linux-gcp Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc5)
|
bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
artful |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Released
(4.13.0-1006.9)
|
|
zesty |
Does not exist
|
|
linux-kvm Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc5)
|
bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
artful |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Released
(4.4.0-1020.25)
|
|
zesty |
Does not exist
|
|
linux-euclid Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc5)
|
bionic |
Does not exist
|
|
artful |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Released
(4.4.0-9026.28)
|
|
zesty |
Does not exist
|
|
linux-mako Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Ignored
(abandoned)
|
|
zesty |
Does not exist
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
zesty |
Does not exist
|
artful |
Does not exist
|
|
bionic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
linux Launchpad, Ubuntu, Debian |
artful |
Released
(4.13.0-25.29)
|
bionic |
Not vulnerable
(4.13.0-25.29)
|
|
trusty |
Not vulnerable
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.4.0-119.143)
|
|
zesty |
Ignored
(end of life)
|
|
Patches: Introduced by 17a5267067f3c372fec9ffb798d6eaba6b5e6a4c |
||
linux-armadaxp Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-goldfish Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Not vulnerable
|
|
zesty |
Ignored
(end of life)
|
|
linux-grouper Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
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-linaro-omap Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
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
|
|
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
|
|
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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-lts-raring Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-lts-trusty Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
trusty |
Does not exist
|
|
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
|
|
trusty |
Ignored
(end of life, was needs-triage)
|
|
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
|
|
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
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux-manta Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
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)
|
|
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
|
|
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)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.4.0-1086.94)
|
|
zesty |
Ignored
(end of life)
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
artful |
Released
(4.4.0-1088.93)
|
bionic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Released
(4.4.0-1088.93)
|
|
zesty |
Ignored
(end of life)
|
|
linux-ti-omap4 Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.15~rc5)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.8 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
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