CVE-2008-3275
Publication date 12 August 2008
Last updated 24 July 2024
Ubuntu priority
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.
From the Ubuntu Security Team
Zoltan Sogor discovered that new directory entries could be added to already deleted directories. A local attacker could exploit this, filling up available memory and disk space, leading to a denial of service.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| linux | ||
| linux-source-2.6.15 | ||
| linux-source-2.6.20 | ||
| linux-source-2.6.22 | ||
Patch details
| Package | Patch details |
|---|---|
| linux |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
5.5 · Medium
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |