CVE-2020-11494
Published: 2 April 2020
An issue was discovered in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2. It allows attackers to read uninitialized can_frame data, potentially containing sensitive information from kernel stack memory, if the configuration lacks CONFIG_INIT_STACK_ALL, aka CID-b9258a2cece4.
From the Ubuntu Security Team
It was discovered that the Serial CAN interface driver in the Linux kernel did not properly initialize data. A local attacker could use this to expose sensitive information (kernel memory).
Priority
Status
Package | Release | Status |
---|---|---|
linux-oem-5.6 Launchpad, Ubuntu, Debian |
focal |
Released
(5.6.0-1008.8)
|
bionic |
Does not exist
|
|
eoan |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-hwe-5.4 Launchpad, Ubuntu, Debian |
upstream |
Released
(5.7~rc1)
|
bionic |
Not vulnerable
(5.4.0-37.41~18.04.1)
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-raspi-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1013.13~18.04.1)
|
upstream |
Released
(5.7~rc1)
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
linux Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-101.102)
|
eoan |
Released
(5.3.0-53.47)
|
|
focal |
Not vulnerable
(5.4.0-24.28)
|
|
trusty |
Ignored
(was needed ESM criteria)
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.4.0-179.209)
|
|
Patches: Introduced by a1044e36e457fb6dbdf90ce756d578b251d99b5e |
||
linux-aws Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1067.71)
|
eoan |
Released
(5.3.0-1019.21)
|
|
focal |
Not vulnerable
(5.4.0-1009.9)
|
|
trusty |
Released
(4.4.0-1067.71)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.4.0-1107.118)
|
|
linux-aws-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-aws-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1019.21~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.15.0-1067.71~16.04.1)
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Released
(5.3.0-1022.23)
|
|
focal |
Not vulnerable
(5.4.0-1010.10)
|
|
trusty |
Ignored
(was needed ESM criteria)
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.15.0-1083.93~16.04.1)
|
|
linux-azure-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1083.93)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-azure-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1022.23~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-azure-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1020.20~18.04.1)
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needed)
|
eoan |
Released
(5.3.0-1020.22)
|
|
focal |
Not vulnerable
(5.4.0-1009.9)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.15.0-1071.81~16.04.1)
|
|
linux-gcp-4.15 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1071.81)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-gcp-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1020.22~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-gke-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1059.62)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-gke-5.0 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1037.38)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-gke-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1020.22~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-53.47~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.15.0-101.102~16.04.1)
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(end of life, was needs-triage)
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1060.61)
|
eoan |
Released
(5.3.0-1017.19)
|
|
focal |
Not vulnerable
(5.4.0-1008.8)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.4.0-1071.78)
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Released
(4.4.0-179.209~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1081.91)
|
eoan |
Ignored
(end of life)
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(end of standard support, was needs-triage)
|
|
linux-oem-osp1 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1052.57)
|
eoan |
Ignored
(end of life)
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1039.43)
|
eoan |
Released
(5.3.0-1018.20)
|
|
focal |
Not vulnerable
(5.4.0-1009.9)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.15.0-1039.43~16.04.1)
|
|
linux-oracle-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needed)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-oracle-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1018.20~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-oracle-5.4 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
linux-raspi Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Released
(5.4.0-1011.11)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1062.66)
|
eoan |
Released
(5.3.0-1025.27)
|
|
focal |
Ignored
(end of life, was needs-triage)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.4.0-1133.142)
|
|
linux-raspi2-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1026.28~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-riscv Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Not vulnerable
(5.4.0-24.28)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1079.86)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.4.0-1137.145)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 4.4 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | High |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11494
- https://lore.kernel.org/netdev/20200401100639.20199-1-rpalethorpe@suse.com/
- https://github.com/torvalds/linux/commit/b9258a2cece4ec1f020715fe3554bc2e360f6264
- https://github.com/richiejp/ltp/blob/pty-slcan/testcases/kernel/pty/pty04.c
- https://ubuntu.com/security/notices/USN-4363-1
- https://ubuntu.com/security/notices/USN-4364-1
- https://ubuntu.com/security/notices/USN-4369-1
- https://ubuntu.com/security/notices/USN-4368-1
- https://usn.ubuntu.com/lsn/0067-1/
- NVD
- Launchpad
- Debian