Samba up to 4.9.17/4.10.11/4.11.4 Log out-of-bounds

Summaryinfo

A vulnerability labeled as problematic has been found in Samba up to 4.9.17/4.10.11/4.11.4. This impacts an unknown function of the component Log Handler. Such manipulation leads to out-of-bounds. This vulnerability is referenced as CVE-2019-14907. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Samba up to 4.9.17/4.10.11/4.11.4 (File Transfer Software) and classified as problematic. Affected by this issue is an unknown part of the component Log Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. CVE summarizes:

All samba versions 4.9.x before 4.9.18, 4.10.x before 4.10.12 and 4.11.x before 4.11.5 have an issue where if it is set with "log level = 3" (or above) then the string obtained from the client, after a failed character conversion, is printed. Such strings can be provided during the NTLMSSP authentication exchange. In the Samba AD DC in particular, this may cause a long-lived process(such as the RPC server) to terminate. (In the file server case, the most likely target, smbd, operates as process-per-client and so a crash there is harmless).

The weakness was published 01/21/2020 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2019-14907 since 08/10/2019. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 236653 (Alibaba Cloud Linux 3 : 0077: samba (ALINUX3-SA-2021:0077)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.18, 4.10.12 or 4.11.5 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (236653). Similar entry is available at VDB-149179. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• File Transfer Software

Name

• Samba

Version

• 4.9.0
• 4.9.1
• 4.9.2
• 4.9.3
• 4.9.4
• 4.9.5
• 4.9.6
• 4.9.7
• 4.9.8
• 4.9.9
• 4.9.10
• 4.9.11
• 4.9.12
• 4.9.13
• 4.9.14
• 4.9.15
• 4.9.16
• 4.9.17
• 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
• 4.11.0
• 4.11.1
• 4.11.2
• 4.11.3
• 4.11.4

License

• open-source

Website

• Product: https://www.samba.org/

CPE 2.3info

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CPE 2.2info

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Exploitinginfo

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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