CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

A vulnerability classified as problematic was found in Wouter Verhelst nbd 2.9.21. This vulnerability affects some unknown functionality of the file nbd-server.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

nbd-server.c in Network Block Device (nbd-server) 2.9.21 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) by causing a negotiation failure, as demonstrated by specifying a name for a non-existent export.

The weakness was released 05/31/2011 as confirmed git commit (GIT Repository). The advisory is shared for download at nbd.git.sourceforge.net. This vulnerability was named CVE-2011-1925 since 05/09/2011. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 59708 (GLSA-201206-35 : nbd: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at nbd.git.sourceforge.net. A possible mitigation has been published 2 years after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (67502), Tenable (59708) and SecurityFocus (BID 47884†). Entries connected to this vulnerability are available at VDB-56577 and VDB-75600.

Productinfo

Vendor

• Wouter Verhelst

Name

• nbd

Version

• 2.9.21

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 59708
Nessus Name: GLSA-201206-35 : nbd: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 71561
OpenVAS Name: Gentoo Security Advisory GLSA 201206-35 (nbd)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: ebbbe0b3ce5393fa42a259f5e03d549508586aaa

Timelineinfo

05/09/2011 🔍
05/17/2011 +8 days 🔍
05/31/2011 +14 days 🔍
05/31/2011 +0 days 🔍
06/25/2012 +391 days 🔍
06/26/2012 +1 days 🔍
03/23/2015 +1000 days 🔍
11/08/2021 +2422 days 🔍

Sourcesinfo

Advisory: nbd.git.sourceforge.net
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-1925 (🔍)
X-Force: 67502
SecurityFocus: 47884 - Network Block Device Server NULL Pointer Dereference Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 03/23/2015 04:50 PM
Updated: 11/08/2021 01:52 AM
Changes: 03/23/2015 04:50 PM (67), 02/09/2019 11:09 AM (2), 11/08/2021 01:52 AM (3)
Complete: 🔍
Cache ID: 98:22A:40

Discussion

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