I’m reading about a [large breach](https://vulnera.com/newswire/brightline-data-breach-affects-over-780k-pediatric-mental-health-patients/) of Protected Health Information (PHI) that affected over 780,000 patients. From the article:
> The breach occurred after a ransomware gang exploited a zero-day vulnerability ([CVE-2023-0669](https://nvd.nist.gov/vuln/detail/CVE-2023-0669)) in the company’s Fortra GoAnywhere MFT secure file-sharing platform.
The description of the problem comes from NIST’s National Vulnerability Database (2nd link)”
> Fortra (formerly, HelpSystems) GoAnywhere MFT suffers from a pre-authentication command injection vulnerability in the License Response Servlet due to deserializing an arbitrary attacker-controlled object. This issue was patched in version 7.1.2.
My understanding of a zero-day vulnerability is that it means there’s a publicly known weakness that hasn’t been fixed yet, but I haven’t found simplified explanations of how the hackers got the data.
In: 1
zero-day vulnerability refers to a vulnerability that is used before it’s made public. It’s a new one not an old one. Pre-authentication means it’s ran before the username and password is seen as correct so it could be ran by anyone. Command injection means your injecting a command into something. Generally for something like this, the username field is used to inject a command by typing something into the username field that allows for a command to be ran on the server without valid permissions.
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