Upstream information

CVE-2021-43809 at MITRE

Description

`Bundler` is a package for managing application dependencies in Ruby. In `bundler` versions before 2.2.33, when working with untrusted and apparently harmless `Gemfile`'s, it is not expected that they lead to execution of external code, unless that's explicit in the ruby code inside the `Gemfile` itself. However, if the `Gemfile` includes `gem` entries that use the `git` option with invalid, but seemingly harmless, values with a leading dash, this can be false. To handle dependencies that come from a Git repository instead of a registry, Bundler uses various commands, such as `git clone`. These commands are being constructed using user input (e.g. the repository URL). When building the commands, Bundler versions before 2.2.33 correctly avoid Command Injection vulnerabilities by passing an array of arguments instead of a command string. However, there is the possibility that a user input starts with a dash (`-`) and is therefore treated as an optional argument instead of a positional one. This can lead to Code Execution because some of the commands have options that can be leveraged to run arbitrary executables. Since this value comes from the `Gemfile` file, it can contain any character, including a leading dash. To exploit this vulnerability, an attacker has to craft a directory containing a `Gemfile` file that declares a dependency that is located in a Git repository. This dependency has to have a Git URL in the form of `-u./payload`. This URL will be used to construct a Git clone command but will be interpreted as the upload-pack argument. Then this directory needs to be shared with the victim, who then needs to run a command that evaluates the Gemfile, such as `bundle lock`, inside. This vulnerability can lead to Arbitrary Code Execution, which could potentially lead to the takeover of the system. However, the exploitability is very low, because it requires a lot of user interaction. Bundler 2.2.33 has patched this problem by inserting `--` as an argument before any positional arguments to those Git commands that were affected by this issue. Regardless of whether users can upgrade or not, they should review any untrustred `Gemfile`'s before running any `bundler` commands that may read them, since they can contain arbitrary ruby code.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 9.3
Vector AV:N/AC:M/Au:N/C:C/I:C/A:C
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 7.3 7.3
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack Vector Local Local
Attack Complexity Low Low
Privileges Required Low Low
User Interaction Required Required
Scope Unchanged Unchanged
Confidentiality Impact High High
Integrity Impact High High
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1193578 [NEW]

No SUSE Security Announcements cross referenced.


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE CaaS Platform 4.0 rubygem-bundler Affected
SUSE CaaS Platform 4.5 rubygem-bundler Affected
SUSE Enterprise Storage 2.1 rubygem-bundler Affected
SUSE Enterprise Storage 3 rubygem-bundler Affected
SUSE Enterprise Storage 4 rubygem-bundler Affected
SUSE Enterprise Storage 6 rubygem-bundler Affected
SUSE Enterprise Storage 7 rubygem-bundler Affected
SUSE Enterprise Storage 7.1 rubygem-bundler Affected
SUSE Linux Enterprise Desktop 11 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Desktop 12 rubygem-bundler Affected
SUSE Linux Enterprise Desktop 12 SP1 rubygem-bundler Affected
SUSE Linux Enterprise Desktop 12 SP2 rubygem-bundler Affected
SUSE Linux Enterprise Desktop 12 SP3 rubygem-bundler Affected
SUSE Linux Enterprise Desktop 12 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Desktop 15 rubygem-bundler Affected
SUSE Linux Enterprise Desktop 15 SP1 rubygem-bundler Affected
SUSE Linux Enterprise Desktop 15 SP2 rubygem-bundler Affected
SUSE Linux Enterprise Desktop 15 SP3 rubygem-bundler Affected
SUSE Linux Enterprise Desktop 15 SP4 rubygem-bundler Affected
SUSE Linux Enterprise High Availability 12 rubygem-bundler Affected
SUSE Linux Enterprise High Availability 12 SP1 rubygem-bundler Affected
SUSE Linux Enterprise High Availability 12 SP2 rubygem-bundler Affected
SUSE Linux Enterprise High Availability 12 SP3 rubygem-bundler Affected
SUSE Linux Enterprise High Availability 12 SP4 rubygem-bundler Affected
SUSE Linux Enterprise High Availability 12 SP5 rubygem-bundler Affected
SUSE Linux Enterprise High Availability Extension 12 SP3 rubygem-bundler Affected
SUSE Linux Enterprise High Availability Extension 12 SP4 rubygem-bundler Affected
SUSE Linux Enterprise High Availability Extension 12 SP5 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 12 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 12 SP1 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 12 SP2 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 12 SP3 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 12 SP4 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 12 SP5 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 15 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 15 SP1 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 15 SP2 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 15 SP3 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 15 SP4 rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 15-ESPOS rubygem-bundler Affected
SUSE Linux Enterprise High Performance Computing 15-LTSS rubygem-bundler Affected
SUSE Linux Enterprise Module for Basesystem 15 rubygem-bundler Affected
SUSE Linux Enterprise Module for Basesystem 15 SP1 rubygem-bundler Affected
SUSE Linux Enterprise Module for Basesystem 15 SP2 rubygem-bundler Affected
SUSE Linux Enterprise Module for Basesystem 15 SP3 rubygem-bundler Affected
SUSE Linux Enterprise Module for Basesystem 15 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Real Time 15 SP2 rubygem-bundler Affected
SUSE Linux Enterprise Real Time 15 SP3 rubygem-bundler Affected
SUSE Linux Enterprise Server 11 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Server 12 rubygem-bundler Affected
SUSE Linux Enterprise Server 12 SP1 rubygem-bundler Affected
SUSE Linux Enterprise Server 12 SP2 rubygem-bundler Affected
SUSE Linux Enterprise Server 12 SP3 rubygem-bundler Affected
SUSE Linux Enterprise Server 12 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Server 12 SP5 rubygem-bundler Affected
SUSE Linux Enterprise Server 15 rubygem-bundler Affected
SUSE Linux Enterprise Server 15 SP1 rubygem-bundler Affected
SUSE Linux Enterprise Server 15 SP1-BCL rubygem-bundler Affected
SUSE Linux Enterprise Server 15 SP1-LTSS rubygem-bundler Affected
SUSE Linux Enterprise Server 15 SP2 rubygem-bundler Affected
SUSE Linux Enterprise Server 15 SP2-BCL rubygem-bundler Affected
SUSE Linux Enterprise Server 15 SP2-LTSS rubygem-bundler Affected
SUSE Linux Enterprise Server 15 SP3 rubygem-bundler Affected
SUSE Linux Enterprise Server 15 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Server 15-ESPOS rubygem-bundler Affected
SUSE Linux Enterprise Server 15-LTSS rubygem-bundler Affected
SUSE Linux Enterprise Server Business Critical Linux 15 SP1 rubygem-bundler Affected
SUSE Linux Enterprise Server Business Critical Linux 15 SP2 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP All-in-One 11 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 11 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 12 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP1 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP2 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 15 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 rubygem-bundler Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Software Development Kit 11 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Software Development Kit 12 rubygem-bundler Affected
SUSE Linux Enterprise Software Development Kit 12 SP1 rubygem-bundler Affected
SUSE Linux Enterprise Software Development Kit 12 SP2 rubygem-bundler Affected
SUSE Linux Enterprise Software Development Kit 12 SP3 rubygem-bundler Affected
SUSE Linux Enterprise Software Development Kit 12 SP4 rubygem-bundler Affected
SUSE Linux Enterprise Software Development Kit 12 SP5 rubygem-bundler Affected
SUSE Manager Proxy 4.0 rubygem-bundler Affected
SUSE Manager Proxy 4.1 rubygem-bundler Affected
SUSE Manager Proxy 4.2 rubygem-bundler Affected
SUSE Manager Proxy 4.3 rubygem-bundler Affected
SUSE Manager Retail Branch Server 4.0 rubygem-bundler Affected
SUSE Manager Retail Branch Server 4.1 rubygem-bundler Affected
SUSE Manager Retail Branch Server 4.2 rubygem-bundler Affected
SUSE Manager Retail Branch Server 4.3 rubygem-bundler Affected
SUSE Manager Server 4.0 rubygem-bundler Affected
SUSE Manager Server 4.1 rubygem-bundler Affected
SUSE Manager Server 4.2 rubygem-bundler Affected
SUSE Manager Server 4.3 rubygem-bundler Affected
SUSE OpenStack Cloud 6 rubygem-bundler Affected
SUSE OpenStack Cloud 6-LTSS rubygem-bundler Affected
SUSE OpenStack Cloud 7 rubygem-bundler Affected
SUSE OpenStack Cloud Crowbar 8 rubygem-bundler Affected
SUSE OpenStack Cloud Crowbar 9 rubygem-bundler Affected


SUSE Timeline for this CVE

CVE page created: Wed Dec 8 23:00:15 2021
CVE page last modified: Thu Dec 1 00:17:47 2022