2020-22884 | Espruino jsvGetStringChars buffer overflow

By Max On Jul 16, 2021

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6.0	$0-$5k	0.41

A vulnerability classified as critical has been found in Espruino. This affects the function jsvGetStringChars. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-120. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow vulnerability in function jsvGetStringChars in Espruino before RELEASE_2V09, allows remote attackers to execute arbitrary code.

The weakness was released 07/13/2021. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2020-22884 since 08/13/2020. The exploitability is told to be easy. It is possible to initiate the attack remotely. A authentication is necessary for exploitation. Technical details are known, but no exploit is available.

Upgrading to version 2V09 eliminates this vulnerability.

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