A vulnerability classified as critical was found in mruby up to 1.4.0 (Programming Language Software). Affected by this vulnerability is the function File#initilialize_copy of the file src/io.c. The manipulation as part of a Ruby Code leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In versions of mruby up to and including 1.4.0, a use-after-free vulnerability exists in src/io.c::File#initilialize_copy(). An attacker that can cause Ruby code to be run can possibly use this to execute arbitrary code.

The bug was discovered 04/16/2018. The weakness was shared 04/18/2018 (GitHub Repository). The advisory is shared at github.com. This vulnerability is known as CVE-2018-10199 since 04/18/2018. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k.

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

The entries VDB-194486, VDB-195822, VDB-195867 and VDB-196362 are related to this item.

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Type

• Programming Language Software

Name

• mruby

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4

License

• open-source

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