Samba up to 4.10.14/4.11.7/4.12.1 Active Directory Domain Controller resource consumption

Summaryinfo

A vulnerability described as problematic has been identified in Samba up to 4.10.14/4.11.7/4.12.1. Affected by this issue is some unknown functionality of the component Active Directory Domain Controller. The manipulation results in resource consumption. This vulnerability is reported as CVE-2020-10704. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Samba up to 4.10.14/4.11.7/4.12.1 (File Transfer Software). Affected is an unknown code block of the component Active Directory Domain Controller. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

A flaw was found when using samba as an Active Directory Domain Controller. Due to the way samba handles certain requests as an Active Directory Domain Controller LDAP server, an unauthorized user can cause a stack overflow leading to a denial of service. The highest threat from this vulnerability is to system availability. This issue affects all samba versions before 4.10.15, before 4.11.8 and before 4.12.2.

The weakness was disclosed 05/06/2020 as not defined bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability is traded as CVE-2020-10704 since 03/20/2020. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 4.10.15, 4.11.8 or 4.12.2 eliminates this vulnerability.

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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
• 4.11.0
• 4.11.1
• 4.11.2
• 4.11.3
• 4.11.4
• 4.11.5
• 4.11.6
• 4.11.7
• 4.12.0
• 4.12.1

License

• open-source

Website

• Product: https://www.samba.org/

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