VDB-160747 · CVE-2019-3881 · Bug 1651826

Bundler up to 2.0.x Permission /tmp/ file access

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.
5.9	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in Bundler up to 2.0.x. This issue affects some unknown processing of the file /tmp/ of the component Permission. This manipulation causes file access. This vulnerability is tracked as CVE-2019-3881. The attack is restricted to local execution. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Bundler up to 2.0.x. It has been declared as critical. Affected by this vulnerability is some unknown processing of the file /tmp/ of the component Permission. The manipulation with an unknown input leads to a file access vulnerability. The CWE definition for the vulnerability is CWE-552. The product makes files or directories accessible to unauthorized actors, even though they should not be. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Bundler prior to 2.1.0 uses a predictable path in /tmp/, created with insecure permissions as a storage location for gems, if locations under the user's home directory are not available. If Bundler is used in a scenario where the user does not have a writable home directory, an attacker could place malicious code in this directory that would be later loaded and executed.

The weakness was disclosed 09/04/2020 as Bug 1651826 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2019-3881 since 01/03/2019. Attacking locally is a requirement. Required for exploitation is a single authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1083 according to MITRE ATT&CK.

Upgrading to version 2.1.0 eliminates this vulnerability.

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

Productinfo

Name

Bundler

Version

CPE 2.3info

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CPE 2.2info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

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

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: File access
CWE: CWE-552 / CWE-425
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Bundler 2.1.0

Timelineinfo

01/03/2019 🔍
09/04/2020 +610 days 🔍
09/04/2020 +0 days 🔍
09/04/2020 +0 days 🔍

Sourcesinfo

Advisory: Bug 1651826
Status: Not defined

CVE: CVE-2019-3881 (🔍)
GCVE (CVE): GCVE-0-2019-3881
GCVE (VulDB): GCVE-100-160747

Entryinfo

Created: 09/04/2020 21:07
Updated: 09/04/2020 21:12
Changes: 09/04/2020 21:07 (41), 09/04/2020 21:12 (17)
Complete: 🔍
Cache ID: 216::103