CVE-2019-13272 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.8 HIGH
Vector:  CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://packetstormsecurity.com/files/153663/Linux-PTRACE_TRACEME-Broken-Permission-Object-Lifetime-Handling.html Third Party Advisory  VDB Entry 
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://access.redhat.com/errata/RHSA-2019:2405
https://access.redhat.com/errata/RHSA-2019:2411
https://access.redhat.com/errata/RHSA-2019:2809
https://bugs.chromium.org/p/project-zero/issues/detail?id=1903 Exploit  Issue Tracking  Patch  Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=1730895 Issue Tracking  Patch  Third Party Advisory 
https://bugzilla.suse.com/show_bug.cgi?id=1140671 Issue Tracking  Patch  Third Party Advisory 
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.17 Vendor Advisory 
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6994eefb0053799d2e07cd140df6c2ea106c41ee Patch  Vendor Advisory 
https://github.com/torvalds/linux/commit/6994eefb0053799d2e07cd140df6c2ea106c41ee Patch  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2019/07/msg00022.html Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2019/07/msg00023.html Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OGRK5LYWBJ4E4SRI4DKX367NHYSI3VOH/ Third Party Advisory 
https://seclists.org/bugtraq/2019/Jul/30 Third Party Advisory 
https://seclists.org/bugtraq/2019/Jul/33 Third Party Advisory 
https://security.netapp.com/advisory/ntap-20190806-0001/
https://support.f5.com/csp/article/K91025336
https://support.f5.com/csp/article/K91025336?utm_source=f5support&utm_medium=RSS
https://usn.ubuntu.com/4093-1/
https://usn.ubuntu.com/4094-1/
https://usn.ubuntu.com/4095-1/
https://usn.ubuntu.com/4117-1/
https://usn.ubuntu.com/4118-1/
https://www.debian.org/security/2019/dsa-4484 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-269 Improper Privilege Management cwe source acceptance level NIST  

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Change History

20 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-13272
NVD Published Date:
07/17/2019
NVD Last Modified:
08/24/2020
Source:
MITRE