Description
Net-SNMP 5.7.1 and earlier, when AgentX is registering to handle a MIB and processing GETNEXT requests, allows remote attackers to cause a denial of service (crash or infinite loop, CPU consumption, and hang) by causing the AgentX subagent to timeout.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | net-snmp | 5.7.2.1~dfsg-3 | — |
| Debian 13 | net-snmp | 5.7.2.1~dfsg-3 | — |
| Debian 12 | net-snmp | 5.7.2.1~dfsg-3 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | net-snmp +5 | 1:5.5-44.el6_4.4 | RHBA-2013:1150 |
| RHEL 5 | net-snmp +4 | 1:5.3.2.2-22.el5_10.1 | RHSA-2014:0322 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Net-SNMP - SNMPD AgentX Subagent Timeout Denial of Service EDB-38854 · dos · Sep 5, 2012 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- RHSA-2014:0322 Red Hat Security Advisory: net-snmp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHBA-2013:1150 Red Hat Bug Fix Advisory: net-snmp bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- WID-SEC-2024-1591 Juniper JUNOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2024
References
- 64048 vdb-entry
- APPLE-SA-2015-10-21-4 vendor-advisory
- https://support.apple.com/HT205375
- http://sourceforge.net/p/net-snmp/bugs/2411/
- RHSA-2014:0322 vendor-advisory
- [oss-security] 20131202 Re: SNMPD DoS #2411 snmpd crashes/hangs when AgentX subagent times-out mailing-list
- [oss-security] 20131202 NMPD DoS #2411 snmpd crashes/hangs when AgentX subagent times-out mailing-list
- USN-2166-1 vendor-advisory
- 59974 third-party-advisory
- 57870 third-party-advisory
- GLSA-201409-02 vendor-advisory
- netsnmp-cve20126151-dos(89485) vdb-entry
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
- 55804 third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1038007