AttackerKBAKB:ADDB2585-1F1E-4954-96CC-D10B59171D41CVE-2019-13272
7.8 High
CVSS3
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
7.2 High
CVSS2
Access Vector
LOCAL
Access 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
0.001 Low
EPSS
Percentile
18.1%
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.
Recent assessments:
Assessed Attacker Value: 0
Assessed Attacker Value: 0Assessed Attacker Value: 0
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
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-13272
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6994eefb0053799d2e07cd140df6c2ea106c41ee
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/[email protected]/message/OGRK5LYWBJ4E4SRI4DKX367NHYSI3VOH
lists.fedoraproject.org/archives/list/[email protected]/message/OGRK5LYWBJ4E4SRI4DKX367NHYSI3VOH/
seclists.org/bugtraq/2019/Jul/30
seclists.org/bugtraq/2019/Jul/33
security.netapp.com/advisory/ntap-20190806-0001
security.netapp.com/advisory/ntap-20190806-0001/
support.f5.com/csp/article/K91025336
support.f5.com/csp/article/K91025336?utm_source=f5support&utm_medium=RSS
usn.ubuntu.com/4093-1
usn.ubuntu.com/4093-1/
usn.ubuntu.com/4094-1
usn.ubuntu.com/4094-1/
usn.ubuntu.com/4095-1
usn.ubuntu.com/4095-1/
usn.ubuntu.com/4117-1
usn.ubuntu.com/4117-1/
usn.ubuntu.com/4118-1
usn.ubuntu.com/4118-1/
www.debian.org/security/2019/dsa-4484
Related
7.8 High
CVSS3
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
7.2 High
CVSS2
Access Vector
LOCAL
Access 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
0.001 Low
EPSS
Percentile
18.1%