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Kernel Live Patch Security Notice LSN-0062-1

Kernel Live Patch Security Notice LSN-0062-1
Posted Feb 3, 2020
Authored by Benjamin M. Romer

It was discovered that the binder IPC implementation in the Linux kernel did not properly perform bounds checking in some situations, leading to an out-of-bounds write. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. 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. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2019-14615, CVE-2019-14895, CVE-2019-14896, CVE-2019-14897, CVE-2019-14901, CVE-2019-18885, CVE-2019-2214
MD5 | 03710b8e9efb16ac3a585bc63c8f8279

Kernel Live Patch Security Notice LSN-0062-1

Change Mirror Download
==========================================================================
Kernel Live Patch Security Notice 0062-1
February 03, 2020

linux vulnerability
==========================================================================

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 |

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

It was discovered that the binder IPC implementation in the Linux kernel
did not properly perform bounds checking in some situations, leading to an
out-of-bounds write. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2019-2214)

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 a heap-based buffer overflow existed in the Marvell
WiFi-Ex Driver for the Linux kernel. A physically proximate attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2019-14895)

It was discovered that a heap-based buffer overflow existed in the Marvell
Libertas WLAN Driver for the Linux kernel. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-14896)

It was discovered that a heap-based buffer overflow existed in the Marvell
Libertas WLAN Driver for the Linux kernel. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-14897)

It was discovered that a heap-based buffer overflow existed in the Marvell
WiFi-Ex Driver for the Linux kernel. A physically proximate attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2019-14901)

It was discovered that the btrfs file system in the Linux kernel did not
properly validate metadata, leading to a NULL pointer dereference. An
attacker could use this to specially craft a file system image that, when
mounted, could cause a denial of service (system crash). (CVE-2019-18885)

Update instructions:

The problem can be corrected by updating your livepatches to the following
versions:

| Kernel | Version | flavors |
|--------------------------+----------+--------------------------|
| 4.4.0-168.197 | 62.2 | generic, lowlatency |
| 4.4.0-168.197~14.04.1 | 62.2 | lowlatency, generic |
| 4.4.0-169.198 | 62.2 | generic, lowlatency |
| 4.4.0-169.198~14.04.1 | 62.2 | lowlatency, generic |
| 4.4.0-170.199 | 62.2 | lowlatency, generic |
| 4.4.0-170.199~14.04.1 | 62.2 | lowlatency, generic |
| 4.4.0-171.200 | 62.2 | lowlatency, generic |
| 4.4.0-1098.109 | 62.2 | aws |
| 4.4.0-1099.110 | 62.2 | aws |
| 4.4.0-1100.111 | 62.2 | aws |
| 4.15.0-69.78 | 62.2 | generic, lowlatency |
| 4.15.0-70.79 | 62.2 | lowlatency, generic |
| 4.15.0-72.81 | 62.2 | generic, lowlatency |
| 4.15.0-74.84 | 62.2 | generic, lowlatency |
| 4.15.0-1054.56 | 62.2 | aws |
| 4.15.0-1056.58 | 62.2 | aws |
| 4.15.0-1057.59 | 62.2 | aws |
| 4.15.0-1063.72 | 62.2 | oem |
| 4.15.0-1064.73 | 62.2 | oem |
| 4.15.0-1065.75 | 62.2 | oem |
| 4.15.0-1066.76 | 62.2 | oem |
| 5.0.0-1025.26~18.04.1 | 62.2 | gcp |
| 5.0.0-1025.27~18.04.1 | 62.2 | azure |
| 5.0.0-1026.27~18.04.1 | 62.2 | gcp |

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-2019-2214, CVE-2019-14615, CVE-2019-14895, CVE-2019-14896,
CVE-2019-14897, CVE-2019-14901, CVE-2019-18885


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