Enterasys NetSight nssyslogd PRI Remote Code Execution VulnerabilityZDI-11-350: December 19th, 2011
TippingPoint™ IPS Customer ProtectionTippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11871. For further product information on the TippingPoint IPS:
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Enterasys Netsight. Authentication is not required to exploit this vulnerability.
The flaw exists within the nssyslogd.exe component which listens by default on UDP port 514. When parsing a new syslog message the process attempts to copy the PRIO field to an intermediate variable. The process does not properly validate the size of the destination buffer and blindly copies user supplied data into a fixed-length buffer on the stack. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the SYSTEM user.
Vendor ResponseEnterasys has issued an update to correct this vulnerability. More details can be found at:
2011-04-27 - Vulnerability reported to vendor
2011-12-19 - Coordinated public release of advisory
CreditThis vulnerability was discovered by:
Andrea Micalizzi aka rgod