Systrace Local Policy Bypass Vulnerability

BID:9998

Info

Systrace Local Policy Bypass Vulnerability

Bugtraq ID: 9998
Class: Design Error
CVE:
Remote: No
Local: Yes
Published: Mar 29 2004 12:00AM
Updated: Mar 29 2004 12:00AM
Credit: Discovery of this vulnerability has been credited to Brad <[email protected]>.
Vulnerable: Niels Provos Systrace 1.4
Niels Provos Systrace 1.3
Niels Provos Systrace 1.2
Niels Provos Systrace 1.1
Not Vulnerable: Niels Provos Systrace 1.5

Discussion

Systrace Local Policy Bypass Vulnerability

Systrace has been reported prone to a vulnerability that may permit an application to completely bypass a Systrace policy. The issue presents itself because Systrace does not perform sufficient sanity checks while handling a process that is being traced with ptrace.

This issue is reported to have been silently patched in Systrace version 1.5, previous versions are believed to be prone to this vulnerability.

Exploit / POC

Systrace Local Policy Bypass Vulnerability

The following proof of concept exploit has been supplied:

Solution / Fix

Systrace Local Policy Bypass Vulnerability

Solution:
The vendor has silently patched this issue in Systrace version 1.5; users are advised to apply updates as soon as possible.


Niels Provos Systrace 1.1

Niels Provos Systrace 1.2

Niels Provos Systrace 1.3

Niels Provos Systrace 1.4

References

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