Bug 1715436

Summary:	[Hardening] Prevent ptrace working in seccomp sandbox
Product:	Red Hat Enterprise Linux 8	Reporter:	Wade Mealing <wmealing>
Component:	kernel	Assignee:	Oleg Nesterov <onestero>
kernel sub component:	Security	QA Contact:	Linqing Lu <lilu>
Status:	CLOSED INSUFFICIENT_DATA	Docs Contact:
Severity:	unspecified
Priority:	unspecified	CC:	kernel-mgr, kernel-qe, lilu, smeisner
Version:	8.1
Target Milestone:	rc
Target Release:	8.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	1715268	Environment:
Last Closed:	2020-06-09 14:49:27 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1715268
Bug Blocks:	1715271, 1715272

Description Wade Mealing 2019-05-30 11:03:21 UTC

+++ This bug was initially created as a clone of Bug #1715268 +++

Description of problem:

In the seccomp implementation prior to kernel version 4.8, there is a possible seccomp bypass due to seccomp policies that allow the use of ptrace. This could lead to local escalation of privilege with no additional execution privileges needed. 

Additional info:

This is a behavioural change that some applications may rely on (I don't expect that it will).