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CVE-2019-13272

Good to know:

Date: July 17, 2019

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.

Language: C

Severity Score

7.8

Related Resources (37)

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

Url: https://security.netapp.com/advisory/ntap-20190806-0001/

Url: https://security-tracker.debian.org/tracker/CVE-2019-13272

Url: https://bugzilla.suse.com/show_bug.cgi?id=1140671

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

Url: https://www.debian.org/security/2019/dsa-4484

Url: https://access.redhat.com/security/cve/CVE-2019-13272

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

Url: https://nvd.nist.gov/vuln/detail/CVE-2019-13272

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

Url: https://support.f5.com/csp/article/K91025336

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OGRK5LYWBJ4E4SRI4DKX367NHYSI3VOH/

Url: https://usn.ubuntu.com/4095-1/

Url: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-13272

Url: https://usn.ubuntu.com/4093-1/

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

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

Url: https://usn.ubuntu.com/4118-1/

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

Url: https://bugzilla.redhat.com/show_bug.cgi?id=1730895

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

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

Url: https://support.f5.com/csp/article/K91025336?utm_source=f5support&utm_medium=RSS

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2019-13272

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

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

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

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

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

Url: https://seclists.org/bugtraq/2019/Jul/30

Url: https://usn.ubuntu.com/4094-1/

Url: https://seclists.org/bugtraq/2019/Jul/33

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

Url: https://github.com/torvalds/linux/commit/6994eefb0053799d2e07cd140df6c2ea106c41ee

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

Url: https://usn.ubuntu.com/4117-1/

Url: https://www.mend.io/vulnerability-database/CVE-2019-13272

Severity Score

7.8

Weakness Type (CWE)

Permissions, Privileges, and Access Control

CWE-264

Improper Privilege Management

CWE-269

CVSS v3.1

Base Score:	7.8
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

CVSS v2

Base Score:	7.2
Access Vector (AV):	LOCAL
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	COMPLETE
Integrity (I):	COMPLETE
Availability (A):	COMPLETE
Additional information:

Mend.io Vulnerability Database

We found results for “”

CVE-2019-13272

Good to know:

Date: July 17, 2019

Language: C

Severity Score

Related Resources (37)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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