Samba file system security bypass
| samba-file-system-security-bypass (47733) |  Medium Risk |
Description:
Samba could allow a remote attacker to bypass security restrictions. If "registry shares" is enabled, a remote authenticated attacker could connect to a share using an older version of smbclient to gain unauthorized access to the root file system.
*CVSS:
| Base Score: | 4.9 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | Single |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | None |
| Temporal Score: | 3.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Upgrade to the latest version of Samba (3.2.7 or later), available from the Samba Web site. See References.
References:
- Samba GIT Repository: smbd: prevent access to root filesystem when connecting with empty service name .
- Samba Security Announcement 05 Jan 2009: Potential access to "/" in setups with registry shares enabled.
- Samba Web site: Samba - opening windows to a wider world.
- BID-33118: Samba Registry Share Name Unauthorized Access Vulnerability
- CVE-2009-0022: Samba 3.2.0 through 3.2.6, when registry shares are enabled, allows remote authenticated users to access the root filesystem via a crafted connection request that specifies a blank share name.
- MDVSA-2009:042: samba
- SA33379: Samba Root File System Access Security Issue
- SECTRACK ID: 1021513: Samba Grants Remote Authenticated Users Access to the Root Filesystem in Certain Cases
- SUSE-SR:2009:001: SUSE Security Summary Report
- USN-702-1: Samba vulnerability
- VUPEN/ADV-2009-0017: Samba Empty Share Name Root Filesystem Access Vulnerability
Platforms Affected:
- Canonical Ubuntu 8.10
- Mandriva Linux 2009.0 X86_64
- Mandriva Linux 2009.0
- Samba Samba 3.2.0
- Samba Samba 3.2.2
- Samba Samba 3.2.3
- Samba Samba 3.2.4
- Samba Samba 3.2.5
- Samba Samba 3.2.6
Reported:
Jan 05, 2009
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 the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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.