CVE-2018-18653

Priority
Description
The Linux kernel, as used in Ubuntu 18.10 and when booted with UEFI Secure
Boot enabled, allows privileged local users to bypass intended Secure Boot
restrictions and execute untrusted code by loading arbitrary kernel
modules. This occurs because a modified kernel/module.c, in conjunction
with certain configuration options, leads to mishandling of the result of
signature verification.
Ubuntu-Description
Daniel Dadap discovered that the module loading implementation in the Linux
kernel did not properly enforce signed module loading when booted with UEFI
Secure Boot in some situations. A local privileged attacker could use this
to execute untrusted code in the kernel.
Notes
 sbeattie> from the commit addressing the issue:
  Recent versions of the "secure boot lockdown" patches introduced
  support for using IMA signatures for module signing instead of
  the standard mechanism. This was causing issues and was removed,
  but the code was missed which actually defers the verification to
  IMA when IMA enforcement is enabled. With our config this means
  that by default module signatures are not being enforced under
  kernel lockdown.
Package
Source: linux (LP Ubuntu Debian)
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):ignored (was needs-triage ESM criteria)
Ubuntu 14.04 LTS (Trusty Tahr):not-affected (3.11.0-12.19)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.2.0-16.19)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.13.0-16.19)
Ubuntu 18.10 (Cosmic Cuttlefish):released (4.18.0-12.13)
Ubuntu 19.04 (Disco Dingo):pending (4.19.0-8.9)
Patches:
Introduced by local-2018-18653-breakFixed by local-2018-18653-fix
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):not-affected (4.4.0-1002.2)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1001.10)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.15.0-1001.1)
Ubuntu 18.10 (Cosmic Cuttlefish):released (4.18.0-1006.7)
Ubuntu 19.04 (Disco Dingo):not-affected (4.18.0-1006.7)
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.15.0-1030.31~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):not-affected (4.15.0-1023.24~14.04.1)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.11.0-1009.9)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.15.0-1002.2)
Ubuntu 18.10 (Cosmic Cuttlefish):released (4.18.0-1006.6)
Ubuntu 19.04 (Disco Dingo):pending (4.18.0-1006.6)
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.13.0-1003.3)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.18.0-1006.6~18.04.1)
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):ignored (was needs-triage ESM criteria)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored (abandoned)
Ubuntu 16.04 LTS (Xenial Xerus):ignored (abandoned)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.10.0-1004.4)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.15.0-1001.1)
Ubuntu 18.10 (Cosmic Cuttlefish):released (4.18.0-1004.5)
Ubuntu 19.04 (Disco Dingo):not-affected (4.18.0-1004.5)
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.18.0-1004.5~18.04.1)
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):ignored (end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored (abandoned)
Ubuntu 16.04 LTS (Xenial Xerus):ignored (end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored (abandoned)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.8.0-36.36~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.18.0-13.14~18.04.1)
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.8.0-36.36~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.18.0-13.14~18.04.1)
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1004.9)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.15.0-1002.2)
Ubuntu 18.10 (Cosmic Cuttlefish):released (4.18.0-1005.5)
Ubuntu 19.04 (Disco Dingo):not-affected (4.18.0-1005.5)
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):ignored (was needs-triage ESM criteria)
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored (end-of-life)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored (end-of-life)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored (end-of-life)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):not-affected (4.4.0-13.29~14.04.1)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored (abandoned)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored (abandoned)
Ubuntu 16.04 LTS (Xenial Xerus):ignored (abandoned)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored (abandoned)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):ignored (was needs-triage now end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.15.0-1002.3)
Ubuntu 18.10 (Cosmic Cuttlefish):not-affected (4.15.0-1004.5)
Ubuntu 19.04 (Disco Dingo):not-affected (4.15.0-1021.24)
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.2.0-1013.19)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.13.0-1005.5)
Ubuntu 18.10 (Cosmic Cuttlefish):released (4.18.0-1007.9)
Ubuntu 19.04 (Disco Dingo):pending (4.18.0-1007.9)
Package
Upstream:released (2.6.12~rc2)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1012.12)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 18.10 (Cosmic Cuttlefish):DNE
Ubuntu 19.04 (Disco Dingo):DNE
More Information

Updated: 2018-12-10 20:14:58 UTC (commit 3778576e82a9159cbf405de6282e964e3d62fffa)