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Last updated: 10/31/2014 7:46:58 PM

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Vulnerability Workload Index: 13.95
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National Cyber Awareness System

Vulnerability Summary for CVE-2007-4849

Original release date: 09/12/2007
Last revised: 09/05/2008
Source: US-CERT/NIST

Overview

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.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 4.4 (MEDIUM) (AV:L/AC:M/Au:N/C:P/I:P/A:P) (legend)
Impact Subscore: 6.4
Exploitability Subscore: 3.4
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: 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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External Source: SECUNIA
Name: 28170
External Source: MLIST
Name: [linux-mtd] 20070822 [JFFS2] Fix ACL vs. mode handling.
External Source: SECUNIA
Name: 28706
External Source: SECUNIA
Name: 26978
External Source: DEBIAN
Name: DSA-1378
External Source: CONFIRM
Name: http://dev.laptop.org/ticket/2732
External Source: UBUNTU
Name: USN-558-1
External Source: UBUNTU
Name: USN-574-1
External Source: BID
Name: 25838
External Source: CONFIRM
Name: http://git.infradead.org/?p=mtd-2.6.git;a=commitdiff;h=9ed437c50d89eabae763dd422579f73fdebf288d

Technical Details

Vulnerability Type (View All)
  • Permissions, Privileges, and Access Control (CWE-264)