CVE-2019-11191
Publication date 11 April 2019
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
** DISPUTED ** The Linux kernel through 5.0.7, when CONFIG_IA32_AOUT is enabled and ia32_aout is loaded, allows local users to bypass ASLR on setuid a.out programs (if any exist) because install_exec_creds() is called too late in load_aout_binary() in fs/binfmt_aout.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat. NOTE: the software maintainer disputes that this is a vulnerability because ASLR for a.out format executables has never been supported.
From the Ubuntu Security Team
Federico Manuel Bento discovered that the Linux kernel did not properly apply Address Space Layout Randomization (ASLR) in some situations for setuid a.out binaries. A local attacker could use this to improve the chances of exploiting an existing vulnerability in a setuid a.out binary.
Status
Package | Ubuntu Release | Status |
---|---|---|
linux | ||
18.04 LTS bionic |
Fixed 4.15.0-51.55
|
|
16.04 LTS xenial |
Fixed 4.4.0-150.176
|
|
14.04 LTS trusty | Ignored | |
linux-aws | ||
18.04 LTS bionic |
Fixed 4.15.0-1040.42
|
|
16.04 LTS xenial |
Fixed 4.4.0-1084.94
|
|
14.04 LTS trusty |
Fixed 4.4.0-1045.48
|
|
linux-aws-hwe | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial |
Fixed 4.15.0-1040.42~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-azure | ||
18.04 LTS bionic |
Fixed 4.18.0-1019.19~18.04.1
|
|
16.04 LTS xenial |
Fixed 4.15.0-1046.50
|
|
14.04 LTS trusty | Ignored | |
linux-azure-edge | ||
18.04 LTS bionic |
Fixed 4.18.0-1019.19~18.04.1
|
|
16.04 LTS xenial |
Fixed 4.15.0-1046.50
|
|
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 4.15.0-1033.35
|
|
16.04 LTS xenial |
Fixed 4.15.0-1033.35~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-gcp-edge | ||
18.04 LTS bionic |
Fixed 4.15.0-1033.35
|
|
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-gke-4.15 | ||
18.04 LTS bionic |
Fixed 4.15.0-1033.35
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gke-5.0 | ||
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
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 |
Fixed 4.18.0-21.22~18.04.1
|
|
16.04 LTS xenial |
Fixed 4.15.0-51.55~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-hwe-edge | ||
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Fixed 4.15.0-51.55~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-kvm | ||
18.04 LTS bionic |
Fixed 4.15.0-1035.35
|
|
16.04 LTS xenial |
Fixed 4.4.0-1047.53
|
|
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 | Ignored | |
linux-lts-vivid | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Ignored | |
linux-lts-wily | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Ignored | |
linux-lts-xenial | ||
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty |
Fixed 4.4.0-150.176~14.04.1
|
|
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 4.15.0-1039.44
|
|
16.04 LTS xenial | Ignored | |
14.04 LTS trusty | Not in release | |
linux-oracle | ||
18.04 LTS bionic |
Fixed 4.15.0-1014.16
|
|
16.04 LTS xenial |
Fixed 4.15.0-1014.16~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-raspi2 | ||
18.04 LTS bionic |
Fixed 4.15.0-1037.39
|
|
16.04 LTS xenial |
Fixed 4.4.0-1110.118
|
|
14.04 LTS trusty | Not in release | |
linux-snapdragon | ||
18.04 LTS bionic |
Fixed 4.15.0-1054.58
|
|
16.04 LTS xenial |
Fixed 4.4.0-1114.119
|
|
14.04 LTS trusty | Not in release |
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Severity score breakdown
Parameter | Value |
---|---|
Base score | 2.5 · Low |
Attack vector | Local |
Attack complexity | High |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | Low |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-4008-1
- Linux kernel vulnerabilities
- 4 June 2019
- USN-4007-1
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- Linux kernel (HWE) vulnerability
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- USN-4007-2
- Linux kernel (HWE) vulnerability
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- USN-4006-1
- Linux kernel vulnerability
- 4 June 2019
- USN-4008-3
- Linux kernel (Xenial HWE) vulnerabilities
- 7 June 2019