CVE-2019-3881
First published: Wed May 23 2018(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/rh-ruby26-ruby | <0:2.6.7-119.el7 | 0:2.6.7-119.el7 |
| redhat/bundler | <2.1.0 | 2.1.0 |
| Bundler | <2.1.0 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1651826
- https://github.com/bundler/bundler/commit/2dfb263b0f
- https://github.com/bundler/bundler/commit/02e7f67727b45
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1651826#c6
- https://github.com/bundler/bundler/issues/6501
- https://sources.debian.org/src/bundler/1.17.3-3/debian/patches/0005-Don-t-use-insecure-temporary-directory-as-home-direc.patch/
- https://sources.debian.org/src/bundler/1.17.3-3/debian/patches/0006-Remove-temporary-home-directories.patch/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1734214
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1734213
- https://github.com/rubygems/bundler/pull/7416/files
- https://access.redhat.com/errata/RHSA-2021:2230
- https://access.redhat.com/security/cve/cve-2019-3881
- https://access.redhat.com/errata/RHSA-2021:2588
- https://www.cve.org/CVERecord?id=CVE-2019-3881 https://nvd.nist.gov/vuln/detail/CVE-2019-3881
Frequently Asked Questions
What is the severity of CVE-2019-3881?
CVE-2019-3881 has a medium severity due to the potential for unauthorized access to sensitive data.
How do I fix CVE-2019-3881?
To fix CVE-2019-3881, upgrade Bundler to version 2.1.0 or later.
What software is affected by CVE-2019-3881?
CVE-2019-3881 affects Bundler versions prior to 2.1.0 and certain versions of the rh-ruby26-ruby package.
How does CVE-2019-3881 impact security?
CVE-2019-3881 allows attackers to exploit predictable paths in insecure temporary storage locations, potentially compromising gem integrity.
Is CVE-2019-3881 a local or remote vulnerability?
CVE-2019-3881 is classified as a local vulnerability since it requires local access to the system to exploit.
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