The update functionality of the Discover Media infotainment system in Volkswagen Polo 2019 vehicles allows physically proximate attackers to execute arbitrary code because some unsigned parts of a metainfo file are parsed, which can cause attacker-controlled files to be written to the infotainment system and executed as root.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-28656
• https://www.contextis.com/en/blog/a-code-signing-bypass-for-the-vw-polo