Bug 755440 – CVE-2011-4324 kernel: nfsv4: mknod(2) DoS

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Bug 755440 - (CVE-2011-4324) CVE-2011-4324 kernel: nfsv4: mknod(2) DoS

Summary:	CVE-2011-4324 kernel: nfsv4: mknod(2) DoS

Status:	CLOSED ERRATA

Aliases:	CVE-2011-4324

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20081223,repor...
Keywords:	Security

Depends On:	754901 755442 782690
Blocks:	755438
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Reported:	2011-11-21 01:50 EST by Eugene Teo (Security Response)
Modified:	2015-02-16 10:40 EST (History)
CC List:	19 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2012-05-04 03:58:24 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2012:0007	normal	SHIPPED_LIVE	Important: kernel security, bug fix, and enhancement update	2012-01-10 20:02:46 EST

Groups: None (edit)

Description Eugene Teo (Security Response) 2011-11-21 01:50:02 EST

Creating a file with mknod(2) syscall on a nfsv4 mount can trigger BUG().

Comment 2 Eugene Teo (Security Response) 2011-11-21 01:55:52 EST

Eryu Guan 2011-11-18 02:16:30 EST

Upstream commit

commit dc0b027dfadfcb8a5504f7d8052754bf8d501ab9
Author: Trond Myklebust <Trond.Myklebust@netapp.com>
Date:   Tue Dec 23 15:21:56 2008 -0500

    NFSv4: Convert the open and close ops to use fmode

    Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

removed the BUGON() at fs/nfs/nfs4xdr.c:894

Comment 4 Eugene Teo (Security Response) 2011-11-21 01:58:22 EST

Statement:

This issue did not affect the Linux kernels as shipped with Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as they did not have the vulnerable code as introduced in history:1a7bc914. This has been addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2012-0007.html. Red Hat Enterprise Linux 4 is now in Production 3 of the maintenance life-cycle, https://access.redhat.com/support/policy/updates/errata/, therefore the fix for this issue is not currently planned to be included in the future updates.

Comment 5 errata-xmlrpc 2012-01-10 15:09:47 EST

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2012:0007 https://rhn.redhat.com/errata/RHSA-2012-0007.html

Comment 6 Eugene Teo (Security Response) 2012-01-18 02:16:09 EST

Created kernel tracking bugs for this issue

Affects: fedora-all [bug 782690]

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