Advisory Details

December 19th, 2011

Enterasys NetSight nssyslogd PRI Remote Code Execution Vulnerability

ZDI-11-350
ZDI-CAN-1099

CVE ID
CVSS SCORE 10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Enterasys
AFFECTED PRODUCTS NetSight
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11871. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


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.

ADDITIONAL DETAILS Enterasys has issued an update to correct this vulnerability. More details can be found at:
https://cp-enterasys.kb.net/article.aspx?article=14206&p=1
DISCLOSURE TIMELINE
  • 2011-04-27 - Vulnerability reported to vendor
  • 2011-12-19 - Coordinated public release of advisory
CREDIT Jeremy Brown
Andrea Micalizzi aka rgod
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