Samba group_mapping.tdb security bypass
| samba-groupmapping-security-bypass (44678) |  Medium Risk |
Description:
Samba could allow a local attacker to bypass security restrictions. Samba re-creates the group_mapping.tdb and group_mapping.ldb files with world-writeable permissions after it is deleted. A local attacker could exploit this vulnerability and bypass security restrictions to modify Samba group mapping information or perform other arbitrary tasks.
*CVSS:
| Base Score: | 4.6 |
| Access Vector: | Local |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 3.4 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Upgrade to the latest version of Samba (3.2.3 or later), available from the Samba Web site. See References.
References:
- Debian Bug report logs - #496073: samba: group_mapping.ldb created world writeable after manual deletion.
- Samba Web site: Samba - opening windows to a wider world.
- BID-30837: Samba Group Mappings File Insecure Permissions Local Security Vulnerability
- CVE-2008-3789: Samba 3.2.0 uses weak permissions (0666) for the (1) group_mapping.tdb and (2) group_mapping.ldb files, which allows local users to modify the membership of Unix groups.
- SA31601: Samba "group_mapping.ldb" Insecure Permissions Security Issue
- SECTRACK ID: 1020770: Samba 'group_mapping.ldb' Has Unsafe Permissions That Let Local Users Gain Elevated Privileges
- VUPEN/ADV-2008-2440: Samba group_mapping.tdb Insecure Permissions Weakness
Platforms Affected:
- Samba Samba 3.2.0
Reported:
Aug 22, 2008
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.