On Linux, an authenticated, low-privileged Nessus user with scan-creation rights could read arbitrary text files on the scanner host with the privileges of the nessusd process by running a custom Unix compliance audit against the scanner itself.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0