CVE-2017-16939
Published: 24 November 2017
The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.
From the Ubuntu Security Team
Mohamed Ghannam discovered that a use-after-free vulnerability existed in the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
Notes
| Author | Note |
|---|---|
| sbeattie |
priority is low for linux_precise/esm, as unprivileged user namespaces is not implemented there. |
Mitigation
If unprivileged user namespaces are not needed, set the kernel.unprivileged_userns_clone sysctl to 0.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux
Launchpad, Ubuntu, Debian |
artful |
Released
(4.13.0-19.22)
|
| bionic |
Not vulnerable
(4.13.0-25.29)
|
|
| trusty |
Released
(3.13.0-137.186)
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Released
(4.4.0-103.126)
|
|
| zesty |
Released
(4.10.0-42.46)
|
|
|
Patches:
Introduced by
12a169e7d8f4b1c95252d8b04ed0f1033ed7cfe2
|
||
|
linux-armadaxp
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-aws
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
| trusty |
Released
(4.4.0-1005.5)
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Released
(4.4.0-1043.52)
|
|
| zesty |
Does not exist
|
|
|
linux-azure
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
| trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Released
(4.11.0-1016.16)
|
|
| zesty |
Does not exist
|
|
|
linux-euclid
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Released
(4.4.0-9020.21)
|
|
| zesty |
Does not exist
|
|
|
linux-flo
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Ignored
(abandoned)
|
|
| zesty |
Does not exist
|
|
|
linux-gcp
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Released
(4.13.0-1002.5)
|
|
| zesty |
Does not exist
|
|
|
linux-gke
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Ignored
(end of standard support, was pending)
|
|
| zesty |
Does not exist
|
|
|
linux-goldfish
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Ignored
(end of life, was needed)
|
|
| 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
(4.14~rc7)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-hwe
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Released
(4.10.0-42.46~16.04.1)
|
|
| zesty |
Does not exist
|
|
|
linux-hwe-edge
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Released
(4.18.0-8.9~18.04.1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Released
(4.10.0-42.46~16.04.1)
|
|
| zesty |
Does not exist
|
|
|
linux-kvm
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Released
(4.4.0-1012.17)
|
|
| zesty |
Does not exist
|
|
|
linux-linaro-omap
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| 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
(4.14~rc7)
|
|
| 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
(4.14~rc7)
|
|
| 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
(4.14~rc7)
|
|
| 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
(4.14~rc7)
|
|
| 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
(4.14~rc7)
|
|
| 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
(4.14~rc7)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-utopic
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.14~rc7)
|
|
| 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
(4.14~rc7)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-wily
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-xenial
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Released
(4.4.0-103.126~14.04.1)
|
|
| upstream |
Released
(4.14~rc7)
|
|
| 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
(4.14~rc7)
|
|
| xenial |
Does not exist
|
|
| 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
(4.14~rc7)
|
|
| xenial |
Ignored
(abandoned)
|
|
| 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
(4.14~rc7)
|
|
| 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
(4.14~rc7)
|
|
| xenial |
Released
(4.13.0-1010.11)
|
|
| zesty |
Does not exist
|
|
|
linux-qcm-msm
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-raspi2
Launchpad, Ubuntu, Debian |
artful |
Released
(4.13.0-1008.8)
|
| bionic |
Not vulnerable
(4.13.0-1008.8)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Released
(4.4.0-1079.87)
|
|
| zesty |
Released
(4.10.0-1023.26)
|
|
|
linux-snapdragon
Launchpad, Ubuntu, Debian |
artful |
Released
(4.4.0-1081.86)
|
| bionic |
Not vulnerable
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| xenial |
Released
(4.4.0-1081.86)
|
|
| zesty |
Released
(4.4.0-1081.86)
|
|
|
linux-ti-omap4
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.14~rc7)
|
|
| 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
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1137b5e2529a8f5ca8ee709288ecba3e68044df2
- http://seclists.org/fulldisclosure/2017/Nov/40
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11
- https://blogs.securiteam.com/index.php/archives/3535
- https://bugzilla.suse.com/show_bug.cgi?id=1069702
- https://github.com/torvalds/linux/commit/1137b5e2529a8f5ca8ee709288ecba3e68044df2
- https://ubuntu.com/security/notices/USN-3511-1
- https://ubuntu.com/security/notices/USN-3510-1
- https://ubuntu.com/security/notices/USN-3510-2
- https://ubuntu.com/security/notices/USN-3509-1
- https://ubuntu.com/security/notices/USN-3509-2
- https://ubuntu.com/security/notices/USN-3508-1
- https://ubuntu.com/security/notices/USN-3508-2
- https://ubuntu.com/security/notices/USN-3507-1
- https://ubuntu.com/security/notices/USN-3507-2
- https://www.cve.org/CVERecord?id=CVE-2017-16939
- NVD
- Launchpad
- Debian