Root Cause Analysis of a Printer’s Drivers Vulnerability CVE-2021-3438

Last week SentinelOne disclosed a "high severity" flaw in HP, Samsung, and Xerox printer's drivers (CVE-2021-3438); the blog post highlighted a vulnerable strncpy operation with a user-controllable size parameter but it did not explain the reverse engineering nor the exploitation phase of the issue. With this blog post, I would like to analyse the vulnerability and its exploitability. This blog post is a re-post of the original article “Root Cause Analysis of a Printer's Driver Vulnerability” that I have written for...

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