New Kernel live patch security updates are available for Ubuntu Linux
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Kernel Live Patch Security Notice 0063-1
February 19, 2020
linux vulnerability
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A security issue affects these releases of Ubuntu:
| Series | Base kernel | Arch | flavors | |------------------+--------------+----------+------------------|
| Ubuntu 18.04 LTS | 4.15.0 | amd64 | aws | | Ubuntu 18.04 LTS | 4.15.0 | amd64 | generic | | Ubuntu 18.04 LTS | 4.15.0 | amd64 | lowlatency | | Ubuntu 18.04 LTS | 4.15.0 | amd64 | oem | | Ubuntu 18.04 LTS | 5.0.0 | amd64 | azure | | Ubuntu 18.04 LTS | 5.0.0 | amd64 | gcp | | Ubuntu 14.04 LTS | 4.4.0 | amd64 | generic | | Ubuntu 14.04 LTS | 4.4.0 | amd64 | lowlatency | | Ubuntu 16.04 LTS | 4.4.0 | amd64 | aws | | Ubuntu 16.04 LTS | 4.4.0 | amd64 | generic | | Ubuntu 16.04 LTS | 4.4.0 | amd64 | lowlatency | | Ubuntu 16.04 LTS | 4.15.0 | amd64 | azure | | Ubuntu 16.04 LTS | 4.15.0 | amd64 | generic | | Ubuntu 16.04 LTS | 4.15.0 | amd64 | lowlatency |
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux: Linux kernel
Details:
Mitchell Frank discovered that the Wi-Fi implementation in the Linux kernel when used as an access point would send IAPP location updates for stations before client authentication had completed. A physically proximate attacker could use this to cause a denial of service. (CVE-2019-5108)
It was discovered that the Linux kernel did not properly clear data structures on context switches for certain Intel graphics processors. A local attacker could use this to expose sensitive information. (CVE-2019-14615)
It was discovered that the crypto subsystem in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19050)
It was discovered that the Datagram Congestion Control Protocol (DCCP) implementation in the Linux kernel did not properly deallocate memory in certain error conditions. An attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-20096)
It was discovered that a race condition can lead to a use-after-free while destroying GEM contexts in the i915 driver for the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-7053)
Update instructions:
The problem can be corrected by updating your livepatches to the following versions:
| Kernel | Version | flavors | |--------------------------+----------+--------------------------|
| 4.4.0-168.197 | 63.1 | generic, lowlatency | | 4.4.0-168.197~14.04.1 | 63.1 | lowlatency, generic | | 4.4.0-169.198 | 63.1 | generic, lowlatency | | 4.4.0-169.198~14.04.1 | 63.1 | lowlatency, generic | | 4.4.0-170.199 | 63.1 | lowlatency, generic | | 4.4.0-170.199~14.04.1 | 63.1 | lowlatency, generic | | 4.4.0-171.200 | 63.1 | lowlatency, generic | | 4.4.0-171.200~14.04.1 | 63.1 | generic, lowlatency | | 4.4.0-173.203 | 63.1 | generic, lowlatency | | 4.4.0-1098.109 | 63.1 | aws | | 4.4.0-1099.110 | 63.1 | aws | | 4.4.0-1100.111 | 63.1 | aws | | 4.4.0-1101.112 | 63.1 | aws | | 4.15.0-69.78 | 63.1 | generic, lowlatency | | 4.15.0-69.78~16.04.1 | 63.1 | lowlatency, generic | | 4.15.0-70.79 | 63.1 | lowlatency, generic | | 4.15.0-70.79~16.04.1 | 63.1 | generic, lowlatency | | 4.15.0-72.81 | 63.1 | generic, lowlatency | | 4.15.0-72.81~16.04.1 | 63.1 | generic, lowlatency | | 4.15.0-74.83~16.04.1 | 63.1 | lowlatency, generic | | 4.15.0-74.84 | 63.1 | generic, lowlatency | | 4.15.0-76.86 | 63.1 | generic, lowlatency | | 4.15.0-76.86~16.04.1 | 63.1 | lowlatency, generic | | 4.15.0-1054.56 | 63.1 | aws | | 4.15.0-1056.58 | 63.1 | aws | | 4.15.0-1057.59 | 63.1 | aws | | 4.15.0-1058.60 | 63.1 | aws | | 4.15.0-1063.68 | 63.1 | azure | | 4.15.0-1063.72 | 63.1 | oem | | 4.15.0-1064.69 | 63.1 | azure | | 4.15.0-1064.73 | 63.1 | oem | | 4.15.0-1065.75 | 63.1 | oem | | 4.15.0-1066.71 | 63.1 | azure | | 4.15.0-1066.76 | 63.1 | oem | | 4.15.0-1067.72 | 63.1 | azure | | 4.15.0-1067.77 | 63.1 | oem | | 5.0.0-1025.26~18.04.1 | 63.1 | gcp | | 5.0.0-1025.27~18.04.1 | 63.1 | azure | | 5.0.0-1026.27~18.04.1 | 63.1 | gcp | | 5.0.0-1027.29~18.04.1 | 63.1 | azure | | 5.0.0-1028.29~18.04.1 | 63.1 | gcp | | 5.0.0-1028.30~18.04.1 | 63.1 | azure | | 5.0.0-1029.30~18.04.1 | 63.1 | gcp | | 5.0.0-1029.31~18.04.1 | 63.1 | azure |
Support Information:
Kernels older than the levels listed below do not receive livepatch updates. Please upgrade your kernel as soon as possible.
| Series | Version | Flavors | |------------------+------------------+--------------------------|
| Ubuntu 18.04 LTS | 4.15.0-1054 | aws | | Ubuntu 16.04 LTS | 4.4.0-1098 | aws | | Ubuntu 18.04 LTS | 5.0.0-1025 | azure | | Ubuntu 16.04 LTS | 4.15.0-1063 | azure | | Ubuntu 18.04 LTS | 4.15.0-69 | generic lowlatency | | Ubuntu 18.04 LTS | 5.0.0-1025 | gcp | | Ubuntu 16.04 LTS | 4.15.0-69 | generic lowlatency | | Ubuntu 14.04 LTS | 4.4.0-168 | generic lowlatency | | Ubuntu 18.04 LTS | 4.15.0-1063 | oem | | Ubuntu 16.04 LTS | 4.4.0-168 | generic lowlatency |
References:
CVE-2019-5108, CVE-2019-14615, CVE-2019-19050, CVE-2019-20096, CVE-2020-7053
