Bug 88615

Summary:	known ptrace exploits are not killed after failed execution causing high load on the system
Product:	[Retired] Red Hat Linux	Reporter:	Vladimir Lazarenko <vlad>
Component:	kernel	Assignee:	Arjan van de Ven <arjanv>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	9	CC:	vlad, wtogami
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	athlon
OS:	Linux
URL:	http://www.lazarenko.net/ptrace.c
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2003-05-30 09:34:09 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Vladimir Lazarenko 2003-04-11 13:52:28 UTC

From Bugzilla Helper:
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Description of problem:
When you try to execute ptrace kernel exploit on the system, the exploit
procedure is terminated due to the fact that operation is not permitted. Alas,
the process itself still remains in the memory causing high load on the system.

exploit source can be found from http://www.lazarenko.net/ptrace.c

Version-Release number of selected component (if applicable):
kernel-2.4.20-8

How reproducible:
Always

Steps to Reproduce:
1. cc -o ptrace ptrace.c
2. ./ptrace
3. ps axuw | grep ptrace
    

Actual Results:  ptrace process, which supposed to be killed, remained in memory
slowly eating processor time, up to 100%.

Expected Results:  Process should have been killed completely, as it happens in
2.4.21-pre* kernel branch.

Additional info:

Comment 1 Vladimir Lazarenko 2003-04-11 15:22:04 UTC

I apologize, ptrace.c is available on that URL now.

Comment 2 Mark J. Cox 2003-05-30 09:34:09 UTC

This should be fixed by RHSA-2003:172
http://rhn.redhat.com/errata/RHSA-2003-172.html
please reopen this bug if you still see this behaviour.