Flaws allow attackers to run malicious code on machines hosting Serv-U products.
SolarWinds, the company at the center of a supply chain attack that compromised nine US agencies and 100 private companies, is scrambling to contain a new security threat: a critical zero-day vulnerability in its Serv-U product line.
Microsoft discovered the exploits and privately reported them to SolarWinds, the latter company said in an advisory published on Friday. SolarWinds said the attacks are entirely unrelated to the supply chain attack discovered in December. “Microsoft has provided evidence of limited, targeted customer impact, though SolarWinds does not currently have an estimate of how many customers may be directly affected by the vulnerability,” company officials wrote. “SolarWinds is unaware of the identity of the potentially affected customers.”
Only SolarWinds Serv-U Managed File Transfer and Serv-U Secure FTP—and by extension, the Serv-U Gateway, a component of those two products—are affected by this vulnerability, which allows attackers to remotely execute malicious code on vulnerable systems.
An attacker can gain privileged access to exploited machines hosting Serv-U products and could then install programs; view, change, or delete data; or run programs on the affected system. The vulnerability exists in the latest Serv-U version 15.2.3 HF1, released on May 5, and all prior versions.