CVE-2015-5621

Vulnerabilidad en la función snmp_pdu_parse en snmp_api.c en net-snmp 5.7.2 y versiones anteriores, no elimina la variable varBind en un elemento netsnmp_variable_list cuando falla el análisis gramatical del SNMP PDU, lo que permite a atacantes remotos causar una denegación de servicio (caída) y posiblemente ejecutar código arbitrario a través de un paquete manipulado.

It was discovered that the snmp_pdu_parse() function could leave incompletely parsed varBind variables in the list of variables. A remote, unauthenticated attacker could use this flaw to crash snmpd or, potentially, execute arbitrary code on the system with the privileges of the user running snmpd.

The net-snmp packages provide various libraries and tools for the Simple Network Management Protocol, including an SNMP library, an extensible agent, tools for requesting or setting information from SNMP agents, tools for generating and handling SNMP traps, a version of the netstat command which uses SNMP, and a Tk/Perl Management Information Base browser. It was discovered that the snmp_pdu_parse() function could leave incompletely parsed varBind variables in the list of variables. A remote, unauthenticated attacker could use this flaw to crash snmpd or, potentially, execute arbitrary code on the system with the privileges of the user running snmpd.