CVE-2018-17972
Publication date 3 October 2018
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel through 4.18.11. It does not ensure that only root may inspect the kernel stack of an arbitrary task, allowing a local attacker to exploit racy stack unwinding and leak kernel task stack contents.
From the Ubuntu Security Team
Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information.
Status
Package | Ubuntu Release | Status |
---|---|---|
linux | ||
18.04 LTS bionic |
Fixed 4.15.0-44.47
|
|
16.04 LTS xenial |
Fixed 4.4.0-139.165
|
|
14.04 LTS trusty |
Fixed 3.13.0-165.215
|
|
linux-aws | ||
18.04 LTS bionic |
Fixed 4.15.0-1032.34
|
|
16.04 LTS xenial |
Fixed 4.4.0-1072.82
|
|
14.04 LTS trusty |
Fixed 4.4.0-1034.37
|
|
linux-aws-hwe | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial |
Fixed 4.15.0-1032.34~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-azure | ||
18.04 LTS bionic |
Fixed 4.15.0-1037.39
|
|
16.04 LTS xenial |
Fixed 4.15.0-1037.39~16.04.1
|
|
14.04 LTS trusty |
Fixed 4.15.0-1037.39~14.04.2
|
|
linux-azure-edge | ||
18.04 LTS bionic |
Fixed 4.15.0-1037.39
|
|
16.04 LTS xenial |
Fixed 4.15.0-1037.39~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-euclid | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Ignored | |
14.04 LTS trusty | Not in release | |
linux-flo | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Ignored | |
14.04 LTS trusty | Not in release | |
linux-gcp | ||
18.04 LTS bionic |
Fixed 4.15.0-1027.28
|
|
16.04 LTS xenial |
Fixed 4.15.0-1027.28~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-gcp-edge | ||
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gke | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Ignored | |
14.04 LTS trusty | Not in release | |
linux-goldfish | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Ignored | |
14.04 LTS trusty | Not in release | |
linux-grouper | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-hwe | ||
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Fixed 4.15.0-45.48~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-hwe-edge | ||
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Fixed 4.15.0-45.48~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-kvm | ||
18.04 LTS bionic |
Fixed 4.15.0-1029.29
|
|
16.04 LTS xenial |
Fixed 4.4.0-1037.43
|
|
14.04 LTS trusty | Not in release | |
linux-lts-trusty | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-lts-utopic | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-lts-vivid | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-lts-wily | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-lts-xenial | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty |
Fixed 4.4.0-139.165~14.04.1
|
|
linux-maguro | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-mako | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Ignored | |
14.04 LTS trusty | Not in release | |
linux-manta | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-oem | ||
18.04 LTS bionic |
Fixed 4.15.0-1033.38
|
|
16.04 LTS xenial | Ignored | |
14.04 LTS trusty | Not in release | |
linux-oracle | ||
18.04 LTS bionic |
Fixed 4.15.0-1008.10
|
|
16.04 LTS xenial |
Fixed 4.15.0-1008.10~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-raspi2 | ||
18.04 LTS bionic |
Fixed 4.15.0-1031.33
|
|
16.04 LTS xenial |
Fixed 4.4.0-1100.108
|
|
14.04 LTS trusty | Not in release | |
linux-snapdragon | ||
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Fixed 4.4.0-1104.109
|
|
14.04 LTS trusty | Not in release |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 · Medium |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-3821-1
- Linux kernel vulnerabilities
- 14 November 2018
- USN-3880-2
- Linux kernel (Trusty HWE) vulnerabilities
- 4 February 2019
- USN-3871-4
- Linux kernel (HWE) vulnerabilities
- 4 February 2019
- USN-3871-1
- Linux kernel vulnerabilities
- 29 January 2019
- USN-3871-5
- Linux kernel (Azure) vulnerabilities
- 7 February 2019
- USN-3835-1
- Linux kernel vulnerabilities
- 3 December 2018
- USN-3832-1
- Linux kernel (AWS) vulnerabilities
- 30 November 2018
- USN-3880-1
- Linux kernel vulnerabilities
- 4 February 2019
- USN-3871-3
- Linux kernel (AWS, GCP, KVM, OEM, Raspberry Pi 2) vulnerabilities
- 4 February 2019
- USN-3821-2
- Linux kernel (Xenial HWE) vulnerabilities
- 14 November 2018