Progress Confirms Zero-Day Vulnerability Behind ShareFile Disruption

Progress Software has confirmed that a zero-day vulnerability was behind the recent ShareFile Storage Zones Controller disruption and that access to the service is being restored. The company disabled access to ShareFile accounts for all customers using Storage Zones Controllers, citing ‘a credible external security threat’. “As of Tuesday, July 14th, access has been restored for Progress ShareFile Storage Zones Controller customers following the service disruption we communicated previously,” Progress told SecurityWeek. The company explained that it prompted customers to shut down their servers running Storage Zones Controllers due to a high-severity vulnerability in versions 5.x and 6.x of the product. “We developed and released patched versions to customers, and once patched, these customers’ Storage Zones Controllers will be operational,” Progress said. The company has not shared details on the vulnerability and has yet to respond to SecurityWeek’s follow-up questions, but said it is not aware of any customer compromise. “At this time, we have no evidence of unauthorized access to any ShareFile customer account or data, and we have not identified any active threat,” the company said. In private communication to its customers, Progress said that the security defect is a path traversal bug exploitable by attackers with administrative privileges. “An authenticated administrative user can read arbitrary files accessible to the application’s service account, write threat actor-controlled content to arbitrary directories, or enumerate the server filesystem layout,” a copy of the email shared on Reddit reads. Defenders are advised to assume the worst, to update their ShareFile Storage Zone Controllers immediately, and to assume that exposed systems may have been compromised. “Don’t assume that installing a patch is the end of the story. When a vendor tells customers to disconnect servers from the internet and then ships a patch days later, for an admin-only exploitable vulnerability no less, no one will be blamed for pondering,” Harris said.