Vulnerability Details

Samba >= 3.4.0 DoS Vulnerability (CVE-2013-4408)

Published: 2021-09-24 10:59:30
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:A/AC:L/Au:N/C:C/I:C/A:C

Detection Type:
Remote Banner Unreliable

Solution Type:
Vendor Patch

Summary:
DCE-RPC fragment length field is incorrectly checked.

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
Samba versions 3.4.0 and above (versions 3.4.0 - 3.4.17, 3.5.0 - 3.5.22, 3.6.0 - 3.6.21, 4.0.0 - 4.0.12 and including 4.1.2) are vulnerable to buffer overrun exploits in the client processing of DCE-RPC packets. This is due to incorrect checking of the DCE-RPC fragment length in the client code. This is a critical vulnerability as the DCE-RPC client code is part of the winbindd authentication and identity mapping daemon, which is commonly configured as part of many server installations (when joined to an Active Directory Domain). A malicious Active Directory Domain Controller or man-in-the-middle attacker impersonating an Active Directory Domain Controller could achieve root-level access by compromising the winbindd process. Samba server versions 3.4.0 - 3.4.17 and versions 3.5.0 - 3.5.22 are also vulnerable to a denial of service attack (server crash) due to a similar error in the server code of those versions. Samba server versions 3.6.0 and above (including all 3.6.x versions, all 4.0.x versions and 4.1.x) are not vulnerable to this problem. In addition range checks were missing on arguments returned from calls to the DCE-RPC functions LookupSids (lsa and samr), LookupNames (lsa and samr) and LookupRids (samr) which could also cause similar problems. As this was found during an internal audit of the Samba code there are no currently known exploits for this problem (as of December 9th 2013).

Affected Versions:
Samba versions 3.4.0 through 3.4.17, 3.5.0 through 3.5.22, 3.6.0 through 3.6.21, 4.0.0 through 4.0.12 and including 4.1.2

Recommendations:
Update to version 3.6.22, 4.0.13, 4.1.3 or later.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2013-4408

References:

https://www.samba.org/samba/security/CVE-2013-4408.html

Severity
High
CVSS Score
8.3
Published
2021-09-24
Modified
2021-10-06
Category
Denial of Service

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