NetBSD up to 1.6.1 bsd.lib.mk link following

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.
4.9	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in NetBSD up to 1.6.1. Affected is an unknown function in the library bsd.lib.mk. Performing a manipulation results in link following. This vulnerability is reported as CVE-2011-1920. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in NetBSD up to 1.6.1 (Operating System). It has been classified as problematic. This affects some unknown functionality in the library bsd.lib.mk. The manipulation with an unknown input leads to a link following vulnerability. CWE is classifying the issue as CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. This is going to have an impact on integrity, and availability. The summary by CVE is:

The make include files in NetBSD before 1.6.2, as used in pmake 1.111 and other products, allow local users to overwrite arbitrary files via a symlink attack on a /tmp/_depend##### temporary file, related to (1) bsd.lib.mk and (2) bsd.prog.mk.

The weakness was disclosed 05/23/2011 as Bug 705100 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2011-1920 since 05/09/2011. Attacking locally is a requirement. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 71026 (Mandriva Linux Security Advisory : pmake (MDVSA-2013:271)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks.

Upgrading to version 1.6 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (67495), Tenable (71026), SecurityFocus (BID 47878†) and Vulnerability Center (SBV-42176†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Name

• NetBSD

Version

• 1.0
• 1.1
• 1.2
• 1.2.1
• 1.3
• 1.3.1
• 1.3.2
• 1.3.3
• 1.4
• 1.4.1
• 1.4.2
• 1.4.3
• 1.5
• 1.5.1
• 1.5.2
• 1.5.3
• 1.6
• 1.6.1

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.1
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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: 71026
Nessus Name: Mandriva Linux Security Advisory : pmake (MDVSA-2013:271)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: NetBSD 1.6

Timelineinfo

05/09/2011 🔍
05/16/2011 +7 days 🔍
05/23/2011 +7 days 🔍
05/23/2011 +0 days 🔍
11/05/2013 +897 days 🔍
11/22/2013 +17 days 🔍
03/23/2015 +486 days 🔍
11/07/2021 +2421 days 🔍

Sourcesinfo

Advisory: Bug 705100
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-1920 (🔍)
GCVE (CVE): GCVE-0-2011-1920
GCVE (VulDB): GCVE-100-57507
X-Force: 67495
SecurityFocus: 47878
Vulnerability Center: 42176 - NetBSD Before 1.6.2 Local Arbitrary File Overwrite via a Symlink Attack, Low

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/07/2021 17:42
Changes: 03/23/2015 16:50 (63), 05/14/2017 10:20 (2), 11/07/2021 17:42 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

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