Samba up to 4.10.16/4.11.10/4.12.3 AD LDAP Server use after free

Summaryinfo

A vulnerability marked as critical has been reported in Samba up to 4.10.16/4.11.10/4.12.3. Affected by this vulnerability is an unknown functionality of the component AD LDAP Server. Performing a manipulation results in use after free. This vulnerability is reported as CVE-2020-10730. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Samba up to 4.10.16/4.11.10/4.12.3 (File Transfer Software). This affects an unknown code of the component AD LDAP Server. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A NULL pointer dereference, or possible use-after-free flaw was found in Samba AD LDAP server in versions before 4.10.17, before 4.11.11 and before 4.12.4. Although some versions of Samba shipped with Red Hat Enterprise Linux do not support Samba in AD mode, the affected code is shipped with the libldb package. This flaw allows an authenticated user to possibly trigger a use-after-free or NULL pointer dereference. The highest threat from this vulnerability is to system availability.

The weakness was disclosed 07/07/2020 as Bug 1849489 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2020-10730 since 03/20/2020. It is possible to initiate the attack remotely. A authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 210262 (RHEL 8 : samba (RHSA-2020:3119)), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (210262). The entry VDB-157708 is pretty similar. Statistical analysis made it clear that VulDB provides the best quality 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

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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