NetHack up to 3.6.4 Configuration Symbol buffer overflow

Summaryinfo

A vulnerability was found in NetHack up to 3.6.4. It has been rated as critical. This impacts an unknown function of the component Configuration Handler. Performing a manipulation of the argument Symbol as part of Configuration File results in buffer overflow. This vulnerability is cataloged as CVE-2020-5213. The attack must be initiated from a local position. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in NetHack up to 3.6.4. This affects an unknown function of the component Configuration Handler. The manipulation of the argument SYMBOL as part of a Configuration File leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In NetHack before 3.6.5, too long of a value for the SYMBOL configuration file option can cause a buffer overflow resulting in a crash or remote code execution/privilege escalation. This vulnerability affects systems that have NetHack installed suid/sgid and shared systems that allow users to upload their own configuration files. Users should upgrade to NetHack 3.6.5.

The weakness was shared 01/28/2020 (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2020-5213 since 01/02/2020. Attacking locally is a requirement. The successful exploitation requires a authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 3.6.5 eliminates this vulnerability.

The entries VDB-149500, VDB-149498, VDB-149497 and VDB-149496 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• NetHack

Version

• 3.6.0
• 3.6.1
• 3.6.2
• 3.6.3
• 3.6.4

Website

• Product: https://github.com/NetHack/NetHack/

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