VDB-11104 · CVE-2013-6230 · BID 63610

ISC BIND up to 9.9.4 WSAloctl Winsock API access control

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

A vulnerability was found in ISC BIND (Domain Name Software). It has been declared as critical. This vulnerability affects some unknown functionality of the component WSAloctl Winsock API. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, and integrity. CVE summarizes:

The Winsock WSAIoctl API in Microsoft Windows Server 2008, as used in ISC BIND 9.6-ESV before 9.6-ESV-R10-P1, 9.8 before 9.8.6-P1, 9.9 before 9.9.4-P1, 9.9.3-S1, 9.9.4-S1, and other products, does not properly support the SIO_GET_INTERFACE_LIST command for netmask 255.255.255.255, which allows remote attackers to bypass intended IP address restrictions by leveraging misinterpretation of this netmask as a 0.0.0.0 netmask.

The weakness was shared 11/06/2013 as bind: localnets ACL bypass caused by WinSock API bug as confirmed advisory (Website). The advisory is shared for download at kb.isc.org. The vendor cooperated in the coordination of the public release. The advisory contains:

On some Microsoft Windows systems, a network interface that has an "all ones" IPv4 subnet mask (255.255.255.255) will be incorrectly reported (by the Winsock WSAIoctl API) as an all zeros value (0.0.0.0). Because interfaces' netmasks are used to compute the broadcast domain for each interface during construction of the built-in "localnets" ACL, an all zeroes netmask can cause matches on any IPv4 address, permitting unexpected access to any BIND feature configured to allow access to "localnets".
This vulnerability was named CVE-2013-6230 since 10/21/2013. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 70889 (ISC BIND 9 localnets ACL Security Bypass), which helps to determine the existence of the flaw in a target environment. It is assigned to the family DNS and relying on port 53.

Upgrading to version 9.6-ESV-R10-P1, 9.8.6-P1 or 9.9.4-P1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (70889). Additional details are provided at bugzilla.redhat.com. The entries VDB-232082, VDB-232084, VDB-232089 and VDB-240041 are related to this item.

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CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Nessus ID: 70889
Nessus Name: ISC BIND 9 localnets ACL Security Bypass
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Exposure Time: 🔍

Upgrade: BIND 9.6-ESV-R10-P1/9.8.6-P1/9.9.4-P1

Timelineinfo

10/21/2013 🔍
11/06/2013 +16 days 🔍
11/06/2013 +0 days 🔍
11/07/2013 +1 days 🔍
11/07/2013 +0 days 🔍
11/08/2013 +0 days 🔍
11/08/2013 +0 days 🔍
11/10/2013 +2 days 🔍
11/13/2013 +3 days 🔍
06/01/2021 +2757 days 🔍

Sourcesinfo

Vendor: isc.org

Advisory: bind: localnets ACL bypass caused by WinSock API bug
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-6230 (🔍)
IAVM: 🔍

Vulnerability Center: 42220 - ISC BIND Remote Security Bypass Vulnerability Due to Improper Handling of the SIO_GET_INTERFACE_LIST Command, Medium
SecurityFocus: 63610
Secunia: 55607 - ISC BIND "localnets" Access Control List Bypass Security Issue, Less Critical
OSVDB: 99492

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 11/08/2013 14:51
Updated: 06/01/2021 20:19
Changes: 11/08/2013 14:51 (77), 05/15/2017 11:05 (1), 06/01/2021 20:11 (4), 06/01/2021 20:19 (1)
Complete: 🔍
Cache ID: 18:0BA:103

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