Samba up to 4.10.16/4.11.10/4.12.3 NetBIOS over TCP/IP resource consumption

Summaryinfo

A vulnerability described as problematic has been identified in Samba up to 4.10.16/4.11.10/4.12.3. Affected by this issue is some unknown functionality of the component NetBIOS over TCPIP Handler. Executing a manipulation can lead to resource consumption. This vulnerability appears as CVE-2020-10745. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in Samba up to 4.10.16/4.11.10/4.12.3 (File Transfer Software). This vulnerability affects an unknown code block of the component NetBIOS over TCPIP Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. CVE summarizes:

A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.

The weakness was presented 07/07/2020 as Bug 1849491 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability was named CVE-2020-10745 since 03/20/2020. The exploitation appears to be easy. 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 T1499.

Upgrading to version 4.10.17, 4.11.11 or 4.12.4 eliminates this vulnerability.

See VDB-157707 for similar entry. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• File Transfer Software

Name

• Samba

Version

• 4.10.0
• 4.10.1
• 4.10.2
• 4.10.3
• 4.10.4
• 4.10.5
• 4.10.6
• 4.10.7
• 4.10.8
• 4.10.9
• 4.10.10
• 4.10.11
• 4.10.12
• 4.10.13
• 4.10.14
• 4.10.15
• 4.10.16
• 4.11.0
• 4.11.1
• 4.11.2
• 4.11.3
• 4.11.4
• 4.11.5
• 4.11.6
• 4.11.7
• 4.11.8
• 4.11.9
• 4.11.10
• 4.12.0
• 4.12.1
• 4.12.2
• 4.12.3

License

• open-source

Website

• Product: https://www.samba.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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