FreeBSD 6.0 nfsd denial of service

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in FreeBSD 6.0. It has been classified as critical. The affected element is an unknown function of the component nfsd. The manipulation leads to denial of service. This vulnerability is listed as CVE-2006-0900. In addition, an exploit is available. It is recommended to apply restrictive firewalling.

Detailsinfo

A vulnerability, which was classified as critical, has been found in FreeBSD 6.0 (Operating System). This issue affects an unknown code block of the component nfsd. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

nfsd in FreeBSD 6.0 kernel allows remote attackers to cause a denial of service via a crafted NFS mount request, as demonstrated by the ProtoVer NFS test suite.

The bug was discovered 02/26/2006. The weakness was presented 02/27/2006 by Evgeny Legerov (Website). It is possible to read the advisory at lists.immunitysec.com. The identification of this vulnerability is CVE-2006-0900 since 02/27/2006. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

After even before and not, there has been an exploit disclosed. The exploit is available at exploit-db.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 20989 (FreeBSD nfsd Malformed NFS Mount Request Remote DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Denial of Service and running in the context r.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at ftp.FreeBSD.org.Addressing this vulnerability is possible by firewalling . The best possible mitigation is suggested to be applying a restrictive firewalling. Attack attempts may be identified with Snort ID 11288. In this case the pattern |00 01 86 A0| is used for detection. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 5045.

The vulnerability is also documented in the databases at X-Force (24918), Exploit-DB (1540), Tenable (20989), SecurityFocus (BID 16838†) and OSVDB (23511†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 20989
Nessus Name: FreeBSD nfsd Malformed NFS Mount Request Remote DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 56353
OpenVAS Name: FreeBSD Security Advisory (FreeBSD-SA-06:10.nfs.asc)
OpenVAS File: 🔍
OpenVAS Family: 🔍

MetaSploit ID: nfsd_mount.rb
MetaSploit Name: FreeBSD Remote NFS RPC Request Denial of Service
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍

Patch: ftp.FreeBSD.org

Snort ID: 11288
Snort Message: RPC portmap mountd tcp request
Snort Pattern: 🔍

Suricata ID: 2002853
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

02/26/2006 🔍
02/26/2006 +0 days 🔍
02/26/2006 +0 days 🔍
02/27/2006 +1 days 🔍
02/27/2006 +0 days 🔍
02/27/2006 +0 days 🔍
02/27/2006 +0 days 🔍
02/27/2006 +0 days 🔍
02/28/2006 +0 days 🔍
03/01/2006 +1 days 🔍
03/05/2006 +4 days 🔍
12/07/2024 +6852 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: lists.immunitysec.com
Researcher: Evgeny Legerov
Status: Confirmed

CVE: CVE-2006-0900 (🔍)
GCVE (CVE): GCVE-0-2006-0900
GCVE (VulDB): GCVE-100-2063
X-Force: 24918 - FreeBSD nfsd NFS Mount request denial of service, Medium Risk
SecurityFocus: 16838 - FreeBSD Remote NFS RPC Request Denial of Service Vulnerability
Secunia: 19017 - FreeBSD "nfsd" NFS Mount Request Denial of Service, Less Critical
OSVDB: 23511 - FreeBSD nfsd Malformed NFS Mount Request Remote DoS
Vulnerability Center: 10538 - FreeBSD Remote DoS via Malformed NFS RPC Request, High

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/28/2006 16:01
Updated: 12/07/2024 10:16
Changes: 02/28/2006 16:01 (108), 06/15/2019 08:49 (1), 12/07/2024 10:16 (22)
Complete: 🔍
Cache ID: 216:09E:103

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