mruby 2.1.0 string.c mrb_str_len_to_dbl out-of-bounds write

Summaryinfo

A vulnerability classified as critical has been found in mruby 2.1.0. Affected by this issue is the function mrb_str_len_to_dbl of the file string.c. This manipulation causes out-of-bounds write. This vulnerability is tracked as CVE-2020-6839. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in mruby 2.1.0 (Programming Language Software) and classified as critical. Affected by this vulnerability is the function mrb_str_len_to_dbl of the file string.c. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In mruby 2.1.0, there is a stack-based buffer overflow in mrb_str_len_to_dbl in string.c.

The weakness was disclosed 01/11/2020. This vulnerability is known as CVE-2020-6839 since 01/11/2020. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-148568 and VDB-148566 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Programming Language Software

Name

• mruby

Version

• 2.1.0

License

• open-source

Website

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

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion