Six Cisco salt-master backend servers were compromised when attackers exploited two recently reported vulnerabilities in SaltStack Salt.

Cisco revealed the attacks in an advisory, saying the Cisco Modeling Labs Corporate Edition (CML) and the Cisco Virtual Internet Routing Lab Personal Edition (VIRL-PE) were vulnerable.

In early May one or more attackers exploited the flaws in the SaltStack open-source, event-based automation and configuration management tool — disclosed and patched just days earlier — to compromise the “Salt master” servers of several prominent users, including the Ghost blogging platform, the open-source mobile operating system LineageOS, and SSL certificate provider DigiCert.

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