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[email protected]CVE-2019-13272

HistoryJul 17, 2019 - 1:15 p.m.

CVE-2019-13272

2019-07-1713:15:10

[email protected]

web.nvd.nist.gov

1264

In Wild

cve

2019

13272

linux kernel

ptrace_link

vulnerability

local users

root access

process

credentials

ptrace relationship

parent-child

exploit

selinux

deny_ptrace

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

7.7

Confidence

High

EPSS

0.003

Percentile

68.2%

JSON

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.

Affected configurations

NVD

Node

linuxlinux_kernelRange3.16.52–3.16.71

linuxlinux_kernelRange4.1.39–4.2

linuxlinux_kernelRange4.4.40–4.4.185

linuxlinux_kernelRange4.8.16–4.9

linuxlinux_kernelRange4.9.1–4.9.185

linuxlinux_kernelRange4.10–4.14.133

linuxlinux_kernelRange4.15–4.19.58

linuxlinux_kernelRange4.20–5.1.17

Node

debiandebian_linuxMatch8.0

debiandebian_linuxMatch9.0

debiandebian_linuxMatch10.0

Node

fedoraprojectfedoraMatch29

Node

canonicalubuntu_linuxMatch16.04esm

canonicalubuntu_linuxMatch18.04esm

canonicalubuntu_linuxMatch19.04

Node

redhatenterprise_linuxMatch7.0

redhatenterprise_linuxMatch8.0

redhatenterprise_linux_for_arm_64Match7.0_aarch64

redhatenterprise_linux_for_ibm_z_systemsMatch7.0_s390x

redhatenterprise_linux_for_real_timeMatch8

redhatenterprise_linux_for_real_time_for_nfvMatch8.0

redhatenterprise_linux_for_real_time_for_nfv_tusMatch8.2

redhatenterprise_linux_for_real_time_for_nfv_tusMatch8.4

redhatenterprise_linux_for_real_time_for_nfv_tusMatch8.6

redhatenterprise_linux_for_real_time_for_nfv_tusMatch8.8

redhatenterprise_linux_for_real_time_tusMatch8.2

redhatenterprise_linux_for_real_time_tusMatch8.4

redhatenterprise_linux_for_real_time_tusMatch8.6

redhatenterprise_linux_for_real_time_tusMatch8.8

Node

netappaff_a700s_firmwareMatch-

AND

netappaff_a700sMatch-

Node

netapph410c_firmwareMatch-

AND

netapph410cMatch-

Node

netapph610s_firmwareMatch-

AND

netapph610sMatch-

Node

netappactive_iq_unified_managerMatch-vmware_vsphere

netappe-series_performance_analyzerMatch-

netappe-series_santricity_os_controllerRange11.0.0–11.60.3

netapphci_management_nodeMatch-

netappservice_processorMatch-

netappsolidfireMatch-

netappsteelstore_cloud_integrated_storageMatch-

netapphci_compute_nodeMatch-

References

packetstormsecurity.com/files/153663/Linux-PTRACE_TRACEME-Broken-Permission-Object-Lifetime-Handling.html

packetstormsecurity.com/files/153702/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html

packetstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.html

packetstormsecurity.com/files/154957/Linux-Polkit-pkexec-Helper-PTRACE_TRACEME-Local-Root.html

packetstormsecurity.com/files/156929/Linux-PTRACE_TRACEME-Local-Root.html

packetstormsecurity.com/files/165051/Linux-Kernel-5.1.x-PTRACE_TRACEME-pkexec-Local-Privilege-Escalation.html

access.redhat.com/errata/RHSA-2019:2405

access.redhat.com/errata/RHSA-2019:2411

access.redhat.com/errata/RHSA-2019:2809

bugs.chromium.org/p/project-zero/issues/detail?id=1903

bugzilla.redhat.com/show_bug.cgi?id=1730895

bugzilla.suse.com/show_bug.cgi?id=1140671

cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.17

git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6994eefb0053799d2e07cd140df6c2ea106c41ee

github.com/torvalds/linux/commit/6994eefb0053799d2e07cd140df6c2ea106c41ee

lists.debian.org/debian-lts-announce/2019/07/msg00022.html

lists.debian.org/debian-lts-announce/2019/07/msg00023.html

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGRK5LYWBJ4E4SRI4DKX367NHYSI3VOH/

seclists.org/bugtraq/2019/Jul/30

seclists.org/bugtraq/2019/Jul/33

security.netapp.com/advisory/ntap-20190806-0001/

support.f5.com/csp/article/K91025336

support.f5.com/csp/article/K91025336?utm_source=f5support&amp%3Butm_medium=RSS

usn.ubuntu.com/4093-1/

usn.ubuntu.com/4094-1/

usn.ubuntu.com/4095-1/

usn.ubuntu.com/4117-1/

usn.ubuntu.com/4118-1/

www.debian.org/security/2019/dsa-4484

Social References

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

7.7

Confidence

High

EPSS

0.003

Percentile

68.2%

JSON

CVE-2019-13272

Affected configurations

References

Social References

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