Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2019-13272

Disclosure Date: July 17, 2019 •
CVE-2019-13272 CVSS v3 Base Score: 7.8
Exploited in the Wild
Reported by gwillcox-r7 and 1 more...
View Source Details
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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.

Add Assessment

No one has assessed this topic. Be the first to add your voice to the community.

CVSS V3 Severity and Metrics
Base Score:
7.8 High
Impact Score:
5.9
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
n/a
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
exploit/linux/local/ptrace_traceme_pkexec_helper
Reporter
Unknown

Vendors

  • canonical,
  • debian,
  • fedoraproject,
  • linux,
  • netapp,
  • redhat

Products

  • active iq unified manager -,
  • aff a700s firmware -,
  • debian linux 10.0,
  • debian linux 8.0,
  • debian linux 9.0,
  • e-series performance analyzer -,
  • e-series santricity os controller,
  • enterprise linux 7.0,
  • enterprise linux 8.0,
  • enterprise linux for arm 64 7.0 aarch64,
  • enterprise linux for ibm z systems 7.0 s390x,
  • enterprise linux for real time 8,
  • enterprise linux for real time for nfv 8.0,
  • enterprise linux for real time for nfv tus 8.2,
  • enterprise linux for real time for nfv tus 8.4,
  • enterprise linux for real time for nfv tus 8.6,
  • enterprise linux for real time for nfv tus 8.8,
  • enterprise linux for real time tus 8.2,
  • enterprise linux for real time tus 8.4,
  • enterprise linux for real time tus 8.6,
  • enterprise linux for real time tus 8.8,
  • fedora 29,
  • h410c firmware -,
  • h610s firmware -,
  • hci compute node -,
  • hci management node -,
  • linux kernel,
  • service processor -,
  • solidfire -,
  • steelstore cloud integrated storage -,
  • ubuntu linux 16.04,
  • ubuntu linux 18.04,
  • ubuntu linux 19.04

References

Canonical
CVE-2019-13272 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-13272)
Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1140671
https://bugzilla.redhat.com/show_bug.cgi?id=1730895
FEDORA-2019-a95015e60f (https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OGRK5LYWBJ4E4SRI4DKX367NHYSI3VOH)
DSA-4484 (https://www.debian.org/security/2019/dsa-4484)
20190722 [SECURITY] [DSA 4484-1] linux security update (https://seclists.org/bugtraq/2019/Jul/30)
20190722 [slackware-security] Slackware 14.2 kernel (SSA:2019-202-01) (https://seclists.org/bugtraq/2019/Jul/33)
[debian-lts-announce] 20190723 [SECURITY] [DLA 1862-1] linux security update (https://lists.debian.org/debian-lts-announce/2019/07/msg00022.html)
[debian-lts-announce] 20190723 [SECURITY] [DLA 1863-1] linux-4.9 security update (https://lists.debian.org/debian-lts-announce/2019/07/msg00023.html)
https://security.netapp.com/advisory/ntap-20190806-0001
https://access.redhat.com/errata/RHSA-2019:2405
https://access.redhat.com/errata/RHSA-2019:2411
USN-4093-1 (https://usn.ubuntu.com/4093-1)
USN-4094-1 (https://usn.ubuntu.com/4094-1)
USN-4095-1 (https://usn.ubuntu.com/4095-1)
https://support.f5.com/csp/article/K91025336
USN-4117-1 (https://usn.ubuntu.com/4117-1)
USN-4118-1 (https://usn.ubuntu.com/4118-1)
https://access.redhat.com/errata/RHSA-2019:2809
https://support.f5.com/csp/article/K91025336?utm_source=f5support&utm_medium=RSS
FEDORA-2019-a95015e60f (https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OGRK5LYWBJ4E4SRI4DKX367NHYSI3VOH/)
https://security.netapp.com/advisory/ntap-20190806-0001/
USN-4093-1 (https://usn.ubuntu.com/4093-1/)
USN-4094-1 (https://usn.ubuntu.com/4094-1/)
USN-4095-1 (https://usn.ubuntu.com/4095-1/)
USN-4117-1 (https://usn.ubuntu.com/4117-1/)
USN-4118-1 (https://usn.ubuntu.com/4118-1/)
Miscellaneous
http://packetstormsecurity.com/files/153663/Linux-PTRACE_TRACEME-Broken-Permission-Object-Lifetime-Handling.html
https://bugs.chromium.org/p/project-zero/issues/detail?id=1903
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.17
https://github.com/torvalds/linux/commit/6994eefb0053799d2e07cd140df6c2ea106c41ee
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit?id=6994eefb0053799d2e07cd140df6c2ea106c41ee
http://packetstormsecurity.com/files/153702/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
http://packetstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.html
http://packetstormsecurity.com/files/154957/Linux-Polkit-pkexec-Helper-PTRACE_TRACEME-Local-Root.html
http://packetstormsecurity.com/files/156929/Linux-PTRACE_TRACEME-Local-Root.html
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6994eefb0053799d2e07cd140df6c2ea106c41ee
http://packetstormsecurity.com/files/165051/Linux-Kernel-5.1.x-PTRACE_TRACEME-pkexec-Local-Privilege-Escalation.html

Additional Info

Authenticated
Unknown
Exploitable
Unknown
Reliability
Unknown
Stability
Unknown
Available Mitigations
Unknown
Shelf Life
Unknown
Userbase/Installbase
Unknown
Patch Effectiveness
Unknown
Technical Analysis