hplip is vulnerable to a Denial-Of-Service-Attack via it's listener port.

The alert-mailing implementation in HP Linux Imaging and Printing (HPLIP) 1.6.7 allows local users to gain privileges and send e-mail messages from the root account via vectors related to the setalerts message, and lack of validation of the device URI associated with an event message.

Sebastian Krahmer reported a flaw in how hplip discovered SNMP devices. If certain hplip commands were run that queried SNMP devices, and a malicious user were able to send crafted SNMP responses, it could cause the running hplip tool to crash or, possibly, execute arbitrary code with the privileges of the user running the tool.

Acknowledgements:

Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for reporting this issue.