CVE-2019-11191
Published: 11 April 2019
** DISPUTED ** The Linux kernel through 5.0.7, when CONFIG_IA32_AOUT is enabled and ia32_aout is loaded, allows local users to bypass ASLR on setuid a.out programs (if any exist) because install_exec_creds() is called too late in load_aout_binary() in fs/binfmt_aout.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat. NOTE: the software maintainer disputes that this is a vulnerability because ASLR for a.out format executables has never been supported.
From the Ubuntu security team
Federico Manuel Bento discovered that the Linux kernel did not properly apply Address Space Layout Randomization (ASLR) in some situations for setuid a.out binaries. A local attacker could use this to improve the chances of exploiting an existing vulnerability in a setuid a.out binary.
Priority
Negligible
CVSS 3 base score: 2.5
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-51.55)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.4.0-150.176)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Ignored
(was needed ESM criteria)
|
|
|
Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by eac616557050737a8d6ef6fe0322d0980ff0ffde |
||
|
linux-aws Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1040.42)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.4.0-1084.94)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Released
(4.4.0-1045.48)
|
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-1040.42~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.18.0-1019.19~18.04.1)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-1046.50)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Ignored
(was needed ESM criteria)
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.18.0-1019.19~18.04.1)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-1046.50)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(was needs-triage ESM criteria)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-flo Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(abandoned)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1033.35)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-1033.35~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1033.35)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(end-of-life)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-gke-4.15 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1033.35)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-gke-5.0 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(5.0.0-1011.11~18.04.1)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(end-of-life)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-grouper Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.18.0-21.22~18.04.1)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-51.55~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(5.0.0-15.16~18.04.1)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-51.55~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1035.35)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.4.0-1047.53)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [end-of-life])
|
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [end-of-life])
|
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [end-of-life])
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Released
(4.4.0-150.176~14.04.1)
|
|
|
linux-maguro Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-mako Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(abandoned)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-manta Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1039.44)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(was needs-triage now end-of-life)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-oracle Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1014.16)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-1014.16~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1037.39)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.4.0-1110.118)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
Upstream |
Released
(5.1~rc1)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1054.58)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.4.0-1114.119)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
Notes
| Author | Note |
|---|---|
| tyhicks | This only affects i386 Ubuntu kernels. Additionally, it is very unlikely that systems will have a setuid a.out program installed. |
| sbeattie | configuration changes to disable i386 a.out support are in progress. |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11191
- https://www.openwall.com/lists/oss-security/2019/04/03/4
- https://www.openwall.com/lists/oss-security/2019/04/03/4/1
- https://usn.ubuntu.com/usn/usn-4006-1
- https://usn.ubuntu.com/usn/usn-4006-2
- https://usn.ubuntu.com/usn/usn-4007-1
- https://usn.ubuntu.com/usn/usn-4007-2
- https://usn.ubuntu.com/usn/usn-4008-1
- https://usn.ubuntu.com/usn/usn-4008-3
- NVD
- Launchpad
- Debian