TALOS-2021-1267 (CVE-2021-21798) is a use-after-free vulnerability that can be triggered if a target opens a specially crafted, malicious PDF. It includes support for several capabilities via third-party libraries to parse the PDFs. Pro PDF allows users to create and modify PDFs and other digital documents. Nitro Pro PDF is part of Nitro Software’s Productivity Suite. Xodo also makes its tools available in a browser, so there’s no need to download it at all.A Cisco Talos team member discovered these vulnerabilities.Ĭisco Talos recently discovered a vulnerability in the Nitro Pro PDF reader that could allow an attacker to execute code in the context of the application. Again, it’s completely free and is full-featured. Xodo PDF Reader and Annotator is also an excellent option. Unlike Nitro PDF Reader, these are free programs. Two of the most popular are Foxit Reader and Adobe Reader DC. Are there any good free alternatives to Nitro PDF Reader? Regarding the data within your PDFs, Nitro Pro offers password-protected encryption. It’s safest to download programs directly from the developer's websites to avoid PUPs. Nitro’s target customers are businesses, so the company knows its software needs to be safe to download. Pricing for Nitro Pro starts with a one-time payment of $157 for a single user. If you want to retain access to those features after 14 days, you’ll need to buy the relevant program. You can download a free trial version that gives you full access to the complete Nitro Productivity Suite, including Nitro Pro and Nitro Sign. You’re also able to see if a PDF document is digitally signed and if it contains bookmarks and comments. You can create PDFs from other document types, highlight text, and add sticky notes. Despite its name, Nitro PDF Reader does substantially more than just allow you to read PDF files – even in the free version.
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