Description

The (1) real_lookup and (2) __lookup_hash functions in fs/namei.c in the vfs implementation in the Linux kernel before 2.6.25.15 do not prevent creation of a child dentry for a deleted (aka S_DEAD) directory, which allows local users to cause a denial of service ("overflow" of the UBIFS orphan area) via a series of attempted file creations within deleted directories.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d70b67c8bc72ee23b55381bd6a884f4796692f77

http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25.15

http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00001.html

http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00003.html

http://lkml.org/lkml/2008/7/2/83

http://secunia.com/advisories/31551

http://secunia.com/advisories/31614

http://secunia.com/advisories/31836

http://secunia.com/advisories/31881

http://secunia.com/advisories/32023

http://secunia.com/advisories/32104

http://secunia.com/advisories/32190

http://secunia.com/advisories/32344

http://secunia.com/advisories/33201

http://secunia.com/advisories/33280

http://secunia.com/advisories/33556

http://www.debian.org/security/2008/dsa-1630

http://www.debian.org/security/2008/dsa-1636

http://www.mandriva.com/security/advisories?name=MDVSA-2008:220

http://www.redhat.com/support/errata/RHSA-2008-0787.html

http://www.redhat.com/support/errata/RHSA-2008-0857.html

http://www.redhat.com/support/errata/RHSA-2008-0885.html

http://www.redhat.com/support/errata/RHSA-2008-0973.html

http://www.redhat.com/support/errata/RHSA-2009-0014.html

http://www.securityfocus.com/bid/30647

http://www.securitytracker.com/id?1020739

http://www.vupen.com/english/advisories/2008/2430

https://bugzilla.redhat.com/show_bug.cgi?id=457858

https://exchange.xforce.ibmcloud.com/vulnerabilities/44410

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10744

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6551

https://usn.ubuntu.com/637-1/

Details

Risk Information

CVSS v2

CVSS v3