Title: Legato NetWorker Reverse DNS Authentication Vulnerability
Severity: HIGH
Description:
Legato NetWorker is a server package designed to help share data, media and backup processes across a heterogeneous network.
As part of the process of authenticating a client, the NetWorker server attempts to verify that their given host matches their given IP address by performing a reverse DNS lookup on the host name. If it is unable to complete this lookup, it continues with the authentication process, trusting the provided information.
A remote attacker able to deny reverse DNS lookup to the vulnerable server will be able to authenticate as an arbitrary host, bypassing this check.
An attacker who has already gained access to some machines within a private network may be able to leverage this vulnerability to extend his reach to additional machines or access.
Affected Products:
- Legato NetWorker 6.0.0
References:
- Legato: Legato NetWorker 6
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