FreeBSD : net-snmp -- DoS for SNMP agent via crafted GETBULK request (daf045d7-b211-11dd-a987-000c29ca8953)
Medium Nessus Plugin ID 34770
SynopsisThe remote FreeBSD host is missing one or more security-related updates.
DescriptionWes Hardaker reports through sourceforge.net forum :
SECURITY ISSUE: A bug in the getbulk handling code could let anyone with even minimal access crash the agent. If you have open access to your snmp agents (bad bad bad; stop doing that!) or if you don't trust everyone that does have access to your agents you should updated immediately to prevent potential denial of service attacks.
Description at cve.mitre.org additionally clarifies :
Integer overflow in the netsnmp_create_subtree_cache function in agent/snmp_agent.c in net-snmp 5.4 before 18.104.22.168, 5.3 before 22.214.171.124, and 5.2 before 126.96.36.199 allows remote attackers to cause a denial of service (crash) via a crafted SNMP GETBULK request, which triggers a heap-based buffer overflow, related to the number of responses or repeats.
SolutionUpdate the affected packages.