Denial of service in net-snmp

1) Resource exhaustion

EUVDB-ID: #VU49578

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2007-5846

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

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

External links

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

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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