CVE-2020-10732
Publication date 12 June 2020
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
A flaw was found in the Linux kernel's implementation of Userspace core dumps. This flaw allows an attacker with a local account to crash a trivial program and exfiltrate private kernel data.
From the Ubuntu Security Team
It was discovered that the elf handling code in the Linux kernel did not initialize memory before using it in certain situations. A local attacker could use this to possibly expose sensitive information (kernel memory).
Status
Package | Ubuntu Release | Status |
---|---|---|
linux | 20.04 LTS focal |
Fixed 5.4.0-40.44
|
18.04 LTS bionic |
Fixed 4.15.0-115.116
|
|
16.04 LTS xenial |
Fixed 4.4.0-186.216
|
|
14.04 LTS trusty | Ignored | |
linux-aws | 20.04 LTS focal |
Fixed 5.4.0-1018.18
|
18.04 LTS bionic |
Fixed 4.15.0-1080.84
|
|
16.04 LTS xenial |
Fixed 4.4.0-1111.123
|
|
14.04 LTS trusty |
Fixed 4.4.0-1075.79
|
|
linux-aws-5.0 | 20.04 LTS focal | Not in release |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-aws-5.3 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 5.3.0-1032.34~18.04.2
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-aws-5.4 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-aws-hwe | 20.04 LTS focal | Not in release |
18.04 LTS bionic | Not in release | |
16.04 LTS xenial |
Fixed 4.15.0-1080.84~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-azure | 20.04 LTS focal |
Fixed 5.4.0-1020.20
|
18.04 LTS bionic | Ignored | |
16.04 LTS xenial |
Fixed 4.15.0-1093.103~16.04.1
|
|
14.04 LTS trusty |
Fixed 4.15.0-1093.103~14.04.1
|
|
linux-azure-4.15 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 4.15.0-1093.103
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-azure-5.3 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 5.3.0-1034.35~18.04.1
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-azure-5.4 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-azure-edge | 20.04 LTS focal | Not in release |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gcp | 20.04 LTS focal |
Fixed 5.4.0-1019.19
|
18.04 LTS bionic | Ignored | |
16.04 LTS xenial |
Fixed 4.15.0-1081.92~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-gcp-4.15 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 4.15.0-1081.92
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gcp-5.3 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 5.3.0-1032.34~18.04.1
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gcp-5.4 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gcp-edge | 20.04 LTS focal | Not in release |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gke-4.15 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 4.15.0-1067.70
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gke-5.0 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 5.0.0-1045.46
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gke-5.3 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 5.3.0-1032.34~18.04.1
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-hwe | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 5.3.0-64.58~18.04.1
|
|
16.04 LTS xenial |
Fixed 4.15.0-115.116~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-hwe-5.4 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 5.4.0-40.44~18.04.1
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-hwe-edge | 20.04 LTS focal | Not in release |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Ignored | |
14.04 LTS trusty | Not in release | |
linux-kvm | 20.04 LTS focal |
Fixed 5.4.0-1018.18
|
18.04 LTS bionic |
Fixed 4.15.0-1072.73
|
|
16.04 LTS xenial |
Fixed 4.4.0-1077.84
|
|
14.04 LTS trusty | Not in release | |
linux-lts-trusty | 20.04 LTS focal | Not in release |
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-lts-xenial | 20.04 LTS focal | Not in release |
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty |
Fixed 4.4.0-186.216~14.04.1
|
|
linux-oem | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 4.15.0-1094.104
|
|
16.04 LTS xenial | Ignored | |
14.04 LTS trusty | Not in release | |
linux-oem-5.6 | 20.04 LTS focal |
Fixed 5.6.0-1018.18
|
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-oem-osp1 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 5.0.0-1065.70
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-oracle | 20.04 LTS focal |
Fixed 5.4.0-1019.19
|
18.04 LTS bionic |
Fixed 4.15.0-1051.55
|
|
16.04 LTS xenial |
Fixed 4.15.0-1051.55~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-oracle-5.0 | 20.04 LTS focal | Not in release |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-oracle-5.3 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 5.3.0-1030.32~18.04.1
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-oracle-5.4 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-raspi | 20.04 LTS focal |
Fixed 5.4.0-1013.13
|
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-raspi-5.4 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-raspi2 | 20.04 LTS focal | Ignored |
18.04 LTS bionic |
Fixed 4.15.0-1068.72
|
|
16.04 LTS xenial |
Fixed 4.4.0-1136.145
|
|
14.04 LTS trusty | Not in release | |
linux-raspi2-5.3 | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 5.3.0-1030.32~18.04.2
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-riscv | 20.04 LTS focal |
Fixed 5.4.0-28.32
|
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-snapdragon | 20.04 LTS focal | Not in release |
18.04 LTS bionic |
Fixed 4.15.0-1084.92
|
|
16.04 LTS xenial |
Fixed 4.4.0-1140.148
|
|
14.04 LTS trusty | Not in release |
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sbeattie
original report claimed this was introduced in 4206d3aa1978e44f58bfa4e1c9d8d35cbf19c187, but further investigation by Jann Horn makes the case that 91c3dba7dbc1 is where the real problem is introduced.
Patch details
Package | Patch details |
---|---|
linux |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 4.4 · Medium |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | Low |
Integrity impact | None |
Availability impact | Low |
Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L |
References
Related Ubuntu Security Notices (USN)
- USN-4411-1
- Linux kernel vulnerabilities
- 6 July 2020
- USN-4427-1
- Linux kernel vulnerabilities
- 27 July 2020
- USN-4439-1
- Linux kernel vulnerabilities
- 27 July 2020
- USN-4440-1
- linux kernel vulnerabilities
- 31 July 2020
- USN-4485-1
- Linux kernel vulnerabilities
- 3 September 2020