#VU49578 Resource exhaustion in Net-snmp - CVE-2007-5846

Vulnerability identifier: #VU49578

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2007-5846

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Net-snmp
Server applications / Remote management servers, RDP, SSH

Vendor: net-snmp.sourceforge.net

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the SNMP agent (snmp_agent.c) in net-snmp does not properly control consumption of internal resources. A remote attacker can trigger resource exhaustion by sending a GETBULK request with a large max-repeaters value and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Net-snmp: 5.0.1 - 5.3.4.pre2

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External links
https://bugs.gentoo.org/show_bug.cgi?id=198346
https://lists.vmware.com/pipermail/security-announce/2008/000014.html
https://net-snmp.svn.sourceforge.net/viewvc/net-snmp/tags/Ext-5-4-1/net-snmp/agent/snmp_agent.c?view=log
https://osvdb.org/38904
https://security.gentoo.org/glsa/glsa-200711-31.xml
https://sourceforge.net/project/shownotes.php?release_id=528095&group_id=12694
https://sourceforge.net/tracker/index.php?func=detail&aid=1712988&group_id=12694&atid=112694
https://www.debian.org/security/2008/dsa-1483
https://www.mandriva.com/security/advisories?name=MDKSA-2007:225
https://www.novell.com/linux/security/advisories/2007_25_sr.html
https://www.redhat.com/support/errata/RHSA-2007-1045.html
https://www.securityfocus.com/archive/1/490917/100/0/threaded
https://www.securityfocus.com/bid/26378
https://www.securitytracker.com/id?1018918
https://www.ubuntu.com/usn/usn-564-1
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43730
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11258
https://www.redhat.com/archives/fedora-package-announce/2007-November/msg00613.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.