Bug 144528 - CAN-2005-0179 RLIMIT_MEMLOCK bypass and (2.6) unprivileged user DoS
Summary: CAN-2005-0179 RLIMIT_MEMLOCK bypass and (2.6) unprivileged user DoS
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel
Version: 4.0
Hardware: All
OS: Linux
Target Milestone: ---
: ---
Assignee: Dave Jones
QA Contact: Brian Brock
Whiteboard: public=20060107,impact=moderate
Depends On:
Blocks: 144195
TreeView+ depends on / blocked
Reported: 2005-01-07 22:14 UTC by Josh Bressers
Modified: 2015-01-04 22:15 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2005-02-18 17:21:08 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2005:092 0 important SHIPPED_LIVE Important: kernel security update 2005-02-18 05:00:00 UTC

Description Josh Bressers 2005-01-07 22:14:33 UTC
*** This bug has been split off bug 144524 ***

------- Original comment by Josh Bressers (Security Response Team) on 2005.01.07
17:08 -------

This was reported by grsecurity to full-disclosure

the 'culprit' patch is how the default RLIM_MEMLOCK and the privilege
to call mlockall have changed in 2.6.9. namely, the former has been
reduced to 32 pages while the latter has been relaxed to allow it for
otherwise unprivileged users if their RLIM_MEMLOCK is bigger than the
currently allocated vm. which is normally good enough, except as you
now know there's a path that can increase the allocated vm without
checking for RLIM_MEMLOCK.

The fix for this issue is attachment 109501 [details]

Comment 1 Josh Bressers 2005-02-18 17:21:08 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


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