CVE-2008-3275
Published: 12 August 2008
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
dapper |
Does not exist
|
| feisty |
Does not exist
|
|
| gutsy |
Does not exist
|
|
| hardy |
Released
(2.6.24-19.41)
|
|
| upstream |
Released
(2.6.27~rc1)
|
|
|
Patches: upstream: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d70b67c8bc72ee23b55381bd6a884f4796692f77 |
||
|
linux-source-2.6.15 Launchpad, Ubuntu, Debian |
dapper |
Released
(2.6.15-52.71)
|
| feisty |
Does not exist
|
|
| gutsy |
Does not exist
|
|
| hardy |
Does not exist
|
|
| upstream |
Released
(2.6.27~rc1)
|
|
|
linux-source-2.6.20 Launchpad, Ubuntu, Debian |
dapper |
Does not exist
|
| feisty |
Released
(2.6.20-17.39)
|
|
| gutsy |
Does not exist
|
|
| hardy |
Does not exist
|
|
| upstream |
Released
(2.6.27~rc1)
|
|
|
linux-source-2.6.22 Launchpad, Ubuntu, Debian |
dapper |
Does not exist
|
| feisty |
Does not exist
|
|
| gutsy |
Released
(2.6.22-15.58)
|
|
| hardy |
Does not exist
|
|
| upstream |
Released
(2.6.27~rc1)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| 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 |