CVE-2019-11135

Published: 12 November 2019

TSX Asynchronous Abort condition on some CPUs utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access.

From the Ubuntu Security Team

Stephan van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel processors using Transactional Synchronization Extensions (TSX) could expose memory contents previously stored in microarchitectural buffers to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information.

Notes

Author	Note
tyhicks	This issue only affects processors manufactured by Intel that support Intel® Transactional Synchronization Extensions (TSX)

Priority

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package	Release	Status
intel-microcode Launchpad, Ubuntu, Debian	bionic	Released (3.20191112-0ubuntu0.18.04.2)
	disco	Released (3.20191112-0ubuntu0.19.04.2)
	eoan	Released (3.20191112-0ubuntu0.19.10.2)
	focal	Released (3.20191115.1ubuntu1)
	trusty	Released (3.20191112-0ubuntu0.14.04.2) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Needs triage
	xenial	Released (3.20191112-0ubuntu0.16.04.2)
linux Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-69.78)
	disco	Released (5.0.0-35.38)
	eoan	Released (5.3.0-22.24)
	focal	Not vulnerable (5.4.0-9.12)
	trusty	Released (3.13.0-175.226) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (5.4~rc8)
	xenial	Released (4.4.0-168.197)
	Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by 1b42f017415b46c317e71d41c34ec088417a1883
linux-aws Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1054.56)
	disco	Released (5.0.0-1021.24)
	eoan	Released (5.3.0-1007.8)
	focal	Not vulnerable (5.4.0-1005.5)
	trusty	Released (4.4.0-1058.62) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (5.4~rc8)
	xenial	Released (4.4.0-1098.109)
linux-aws-5.0 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-1021.24~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-aws-hwe Launchpad, Ubuntu, Debian	bionic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Released (4.15.0-1054.56~16.04.1)
linux-azure Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1025.27~18.04.1)
	disco	Released (5.0.0-1025.27)
	eoan	Released (5.3.0-1007.8)
	focal	Not vulnerable (5.4.0-1006.6)
	trusty	Released (4.15.0-1063.68~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (5.4~rc8)
	xenial	Released (4.15.0-1063.68)
linux-azure-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1007.8~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-azure-edge Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Ignored (end of standard support, was needs-triage)
linux-gcp Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1025.26~18.04.1)
	disco	Released (5.0.0-1025.26)
	eoan	Released (5.3.0-1008.9)
	focal	Not vulnerable (5.4.0-1005.5)
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Released (4.15.0-1049.52)
linux-gcp-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1008.9~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-gcp-edge Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-gke-4.15 Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1048.51)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-gke-5.0 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1025.26~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-gke-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1011.12~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-35.38~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Released (4.15.0-69.78~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was pending)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Ignored (end of life, was needs-triage)
linux-kvm Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1050.50)
	disco	Released (5.0.0-1022.24)
	eoan	Released (5.3.0-1007.8)
	focal	Not vulnerable (5.4.0-1004.4)
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Released (4.4.0-1062.69)
linux-lts-trusty Launchpad, Ubuntu, Debian	bionic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	bionic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Released (4.4.0-168.197~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1063.72)
	disco	Ignored (end of life)
	eoan	Released (4.15.0-1063.72)
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Ignored (end of standard support, was needs-triage)
linux-oem-5.6 Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Not vulnerable (5.4.0-1002.4)
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-oem-osp1 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1027.31)
	disco	Ignored (end of life)
	eoan	Released (5.0.0-1027.31)
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-oracle Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1029.32)
	disco	Released (5.0.0-1007.12)
	eoan	Released (5.3.0-1006.7)
	focal	Not vulnerable (5.4.0-1005.5)
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Released (4.15.0-1029.32~16.04.1)
linux-oracle-5.0 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-1007.12~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-oracle-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1011.12~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1052.56)
	disco	Released (5.0.0-1022.23)
	eoan	Released (5.3.0-1012.14)
	focal	Ignored (end of life, was needed)
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Released (4.4.0-1126.135)
linux-raspi2-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1017.19~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Does not exist
linux-snapdragon Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1069.76)
	disco	Ignored (end of life, was pending)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (5.4~rc8)
	xenial	Released (4.4.0-1130.138)

Severity score breakdown

Parameter	Value
Base score	6.5
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References

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