Denial of service in net-snmp

1) Resource exhaustion

EUVDB-ID: #VU49578

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 - 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

CPE2.3

• cpe:2.3:a:net-snmp_sourceforge_net:net-snmp:5.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:net-snmp_sourceforge_net:net-snmp:5.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:net-snmp_sourceforge_net:net-snmp:5.0.3:*:*:*:*:*:*:*

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

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.