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Nitro Software motivated the long silence by saying that the previous emails went to the spam folder. Spam ate the security reportsĬisco Talos initially sent a bug report to Nitro Software on May 7 but the company replied with an acknowledgment three months later, on August 7, after a third followup message from the researchers. With six bugs publicly disclosed, though, one more would not make any difference, so 0Patch will distribute a micropatch for it, too.
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"We made it an exercise in micropatching but didn't want to publish a patch because the 0day wasn't publicly known and we'd effectively reveal it through our patch." - Mitja Kolsek A similar bug exists that was reported to Acros Security and Nitro Software about two years ago it was never fixed and affects the current version of the product. These are not the only problems in Nitro PDF. If the case, micropatches will be released for all six vulnerabilities.
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After some further analysis we created a patch candidate that blocks the exploit.ĬVE-2019-5050 is the only security issue discovered by the Cisco Talos researchers confirmed to impact the latest version of Nitro PDF Pro but Kolsek suspects that others do, too. POC was easy to recreate and the vuln was triggered exactly as in Talos's analysis. He told BleepingComputer that it will be released on Monday to customers with a Pro license. Kolsek announced on Friday that a micropatch candidate that blocks exploitation of CVE-2019-5050 is available.
They are delivered through the 0Patch agent and do not require rebooting the system because they are applied in memory when the software is running.
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Micropatches are tiny pieces of code that focus only on the vulnerability that needs to be addressed in a software product.
Mitja Kolsek, CEO of Acros Security company behind the 0patch micropatch platform, found that the issue is also present in the latest release of Nitro PDF Pro, 13.2.3.26, available since September 27. It resides in the PDF parsing functionality of the software.Īt the least, the issue causes a crash but the researchers believe that, with a little effort, an attacker may be able to run arbitrary code on the system in the context of the current user. Tracked as CVE-2019-5050, the bug is part of a set of six vulnerabilities discovered by researchers at Cisco Talos in Nitro PDF Pro 12.12.1.522 and disclosed earlier this week. Its customers include the Australian Pacific National rail freight operator, German automotive manufacturer Continental, Zebra Technologies (asset tracking solutions), T-Mobile Austria (telecom), Swiss Re (insurance), and JLL (property management). Companies operating at a national or global scale are on the list, running its software as an alternative to Adobe Acrobat Pro. Nitro PDF's developer has a customer base predominantly from the enterprise world. Leveraging is possible through a specially crafted PDF file opened with a vulnerable version of the software. A fix from a third party is on its way.Īn official patch from the developer is unavailable for this security flaw, which has a severity score of 8.8 out of 10. The current version of Nitro PDF Pro has at least one vulnerability that could be used to attempt remote code execution on the victim host.
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