USN-4182-1: Intel Microcode update
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. (CVE-2019-11135) It was discovered that certain Intel Xeon processors did not properly restrict access to a voltage modulation interface. A local privileged attacker could use this to cause a denial of service (system crash). (CVE-2019-11139)
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/intel-microcodeto a version that resolves this vulnerability.Fixed in 3.20191112-0ubuntu0.19.10.2 - Upgrade
Upgrade
ubuntu/intel-microcodeto a version that resolves this vulnerability.Fixed in 3.20191112-0ubuntu0.19.04.2 - Upgrade
Upgrade
ubuntu/intel-microcodeto a version that resolves this vulnerability.Fixed in 3.20191112-0ubuntu0.18.04.2 - Upgrade
Upgrade
ubuntu/intel-microcodeto a version that resolves this vulnerability.Fixed in 3.20191112-0ubuntu0.16.04.2 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Patch USN-4182-1 - Compensating control
Restrict access to the voltage modulation interface.
Event History
Frequently Asked Questions
What is the severity of USN-4182-1?
The severity of USN-4182-1 is high.
How do I fix USN-4182-1?
To fix USN-4182-1, update the intel-microcode package to version 3.20191112-0ubuntu0.19.10.2 (for Ubuntu 19.10), 3.20191112-0ubuntu0.19.04.2 (for Ubuntu 19.04), 3.20191112-0ubuntu0.18.04.2 (for Ubuntu 18.04), or 3.20191112-0ubuntu0.16.04.2 (for Ubuntu 16.04).
Which processors are affected by USN-4182-1?
USN-4182-1 affects Intel processors using Transactional Synchronization Extensions (TSX).
What is the CVE identifier for the vulnerability addressed in USN-4182-1?
The CVE identifier for the vulnerability addressed in USN-4182-1 is CVE-2019-11135.