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Ubuntu: (Multiple Advisories) (CVE-2019-13272): Linux kernel vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2019-13272): Linux kernel vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
07/17/2019
Created
08/15/2019
Added
08/14/2019
Modified
03/22/2023

Description

In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to create a ptrace relationship, which allows local users to obtain root access by leveraging certain scenarios with a parent-child process relationship, where a parent drops privileges and calls execve (potentially allowing control by an attacker). One contributing factor is an object lifetime issue (which can also cause a panic). Another contributing factor is incorrect marking of a ptrace relationship as privileged, which is exploitable through (for example) Polkit's pkexec helper with PTRACE_TRACEME. NOTE: SELinux deny_ptrace might be a usable workaround in some environments.

Solution(s)

  • ubuntu-upgrade-linux-image-4-15-0-1021-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1040-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1040-gke
  • ubuntu-upgrade-linux-image-4-15-0-1042-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1043-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1047-aws
  • ubuntu-upgrade-linux-image-4-15-0-1050-oem
  • ubuntu-upgrade-linux-image-4-15-0-1060-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-58-generic
  • ubuntu-upgrade-linux-image-4-15-0-58-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-58-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-1054-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1090-aws
  • ubuntu-upgrade-linux-image-4-4-0-1118-raspi2
  • ubuntu-upgrade-linux-image-4-4-0-1122-snapdragon
  • ubuntu-upgrade-linux-image-4-4-0-159-generic
  • ubuntu-upgrade-linux-image-4-4-0-159-generic-lpae
  • ubuntu-upgrade-linux-image-4-4-0-159-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-159-powerpc-e500mc
  • ubuntu-upgrade-linux-image-4-4-0-159-powerpc-smp
  • ubuntu-upgrade-linux-image-4-4-0-159-powerpc64-emb
  • ubuntu-upgrade-linux-image-4-4-0-159-powerpc64-smp
  • ubuntu-upgrade-linux-image-5-0-0-1013-gcp
  • ubuntu-upgrade-linux-image-5-0-0-1013-kvm
  • ubuntu-upgrade-linux-image-5-0-0-1014-aws
  • ubuntu-upgrade-linux-image-5-0-0-1014-azure
  • ubuntu-upgrade-linux-image-5-0-0-1014-raspi2
  • ubuntu-upgrade-linux-image-5-0-0-1018-snapdragon
  • ubuntu-upgrade-linux-image-5-0-0-25-generic
  • ubuntu-upgrade-linux-image-5-0-0-25-generic-lpae
  • ubuntu-upgrade-linux-image-5-0-0-25-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-hwe
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-4-15
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-16-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-powerpc-e500mc
  • ubuntu-upgrade-linux-image-powerpc-smp
  • ubuntu-upgrade-linux-image-powerpc64-emb
  • ubuntu-upgrade-linux-image-powerpc64-smp
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon
  • ubuntu-upgrade-linux-image-snapdragon-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-16-04
  • ubuntu-upgrade-linux-image-virtual-hwe-18-04

References

  • https://attackerkb.com/topics/cve-2019-13272
  • CVE - 2019-13272
  • DSA-4484
  • CVE-2019-13272
  • RHSA-2019:2405
  • RHSA-2019:2411
  • RHSA-2019:2809
  • USN-3821-1
  • USN-3821-2
  • USN-3879-1
  • USN-3879-2
  • USN-3910-1
  • USN-3910-2
  • USN-3932-1
  • USN-3932-2
  • USN-4005-1
  • USN-4008-1
  • USN-4008-3
  • USN-4068-1
  • USN-4068-2
  • USN-4069-1
  • USN-4069-2
  • USN-4076-1
  • USN-4093-1
  • USN-4094-1
  • USN-4095-1
  • USN-4095-2
  • USN-4114-1
  • USN-4115-1
  • USN-4116-1
  • USN-4117-1
  • USN-4118-1
  • USN-4145-1
  • USN-4147-1
  • USN-4211-1
  • USN-4211-2
  • USN-4286-1
  • USN-4286-2
  • USN-4351-1
  • USN-4708-1
  • USN-4709-1
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