ZDI-11-350 : Enterasys NetSight nssyslogd PRI Remote Code Execution Vulnerability

[ZDI Disclosures <zdi-disclosures@xxxxxxxxxxxxxxxx>]

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ZDI-11-350 : Enterasys NetSight nssyslogd PRI Remote Code Execution
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-11-350
December 19, 2011

- -- CVE ID:


- -- CVSS:
10, AV:N/AC:L/Au:N/C:C/I:C/A:C

- -- Affected Vendors:

Enterasys



- -- Affected Products:

Enterasys NetSight



- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 11871.
For further product information on the TippingPoint IPS, visit:

    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.

- -- Vendor Response:

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:
This vulnerability was discovered by:

* Jeremy Brown


* Andrea Micalizzi aka rgod



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