CVE-2007-4849

Severity: medium (CVSS 4.4 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2007-09-12 · updated 2026-06-16
Weakness: CWE-264

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.

Affected products

One Laptop Per Child Olpc Linux: build_542

References

http://dev.laptop.org/ticket/2732
http://git.infradead.org/?p=mtd-2.6.git%3Ba=commitdiff%3Bh=9ed437c50d89eabae763dd422579f73fdebf288d
http://lists.infradead.org/pipermail/linux-mtd-cvs/2007-August/005897.html
http://secunia.com/advisories/26978
http://secunia.com/advisories/28170
http://secunia.com/advisories/28706
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
http://dev.laptop.org/ticket/2732
http://git.infradead.org/?p=mtd-2.6.git%3Ba=commitdiff%3Bh=9ed437c50d89eabae763dd422579f73fdebf288d

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