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It is not sandboxed. So one can expect zero day exists and are exploited. That may not be a feature for you, but it is for attackers.
by dolmen 1y ago
It is not sandboxed.
So one can expect zero day exists and are exploited.
That may not be a feature for you, but it is for attackers.
- jasonjayr 1y agoDoes it implement any of the dynamic features in PDF that are vectors for easy attacks like that? PDF was originally a display-only format.
- kccqzy 1y agoYou don't need any dynamic features in PDF to attack. One of the most famous exploits used a bug in the JBIG2 format to build the attacker's own dynamic feature (basically a virtual machine built from logic operations) to launch an exploit. https://googleprojectzero.blogspot.com/2021/12/a-deep-dive-into-nso-zero-click.html https://googleprojectzero.blogspot.com/2021/12/a-deep-dive-i... In fact you have gotten it backwards. The obviously dynamic features in PDF like JavaScript are designed to be dynamic so they receive so much more attention in security. So smart attackers attack the not-obviously-dynamic features in PDF.
- jasonjayr 1y agoAh, very good point.
- shakna 1y agoSumatra has more security features than most other readers? For example, it doesn't support JavaScript. And it doesn't support GoToE. The text features, both strings and fonts, get sent through HarfBuzz for sanitisation. How is it not sandboxed?