National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2007-4849 Detail

Description

JFFS2, as used on One Laptop Per Child (OLPC) build 542 and possibly other Linux systems, when POSIX ACL support is enabled, does not properly store permissions during (1) inode creation or (2) ACL setting, which might allow local users to access restricted files or directories after a remount of a filesystem, related to "legacy modes" and an inconsistency between dentry permissions and inode permissions.

Source:  MITRE
Description Last Modified:  09/12/2007

Impact

CVSS v2.0 Severity and Metrics:

Base Score: 4.4 MEDIUM
Vector: (AV:L/AC:M/Au:N/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 3.4


Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

Vendor Statements (disclaimer)

Official Statement from Red Hat (10/10/2007)

Not vulnerable. There is no support for jffs2 in the Linux kernel as distributed with Red Hat Enterprise Linux 2.1 or 3. There is no ACL support for jffs2 in the Linux kernel as distributed with Red Hat Enterprise Linux 4 or 5.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://dev.laptop.org/ticket/2732
http://git.infradead.org/?p=mtd-2.6.git;a=commitdiff;h=9ed437c50d89eabae763dd422579f73fdebf288d
http://lists.infradead.org/pipermail/linux-mtd-cvs/2007-August/005897.html
http://www.debian.org/security/2007/dsa-1378
http://www.securityfocus.com/bid/25838
http://www.ubuntu.com/usn/usn-558-1
http://www.ubuntu.com/usn/usn-574-1

Technical Details

Vulnerability Type (View All)

  • Permissions, Privileges, and Access Control (CWE-264)

Vulnerable software and versions Switch to CPE 2.2

Configuration 1
OR
cpe:2.3:a:one_laptop_per_child:olpc_linux:build_542:*:*:*:*:*:*:*

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

1 change record found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2007-4849
NVD Published Date:
09/12/2007
NVD Last Modified:
09/05/2008