CVE-2021-42771 Directory Traversal in Babel
Attackers can execute arbitrary code by loading malicious locale files via directory traversal in the Babel library.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-42771?
CVE-2021-42771 is a high-severity path traversal vulnerability in Debian Debian Linux, published on 20 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Babel.Locale in Babel before 2.9.1 allows attackers to load arbitrary locale .dat files (containing serialized Python objects) via directory traversal, leading to code execution.
Weakness: CWE-22
Which versions are affected by CVE-2021-42771?
3 open source packages ship an affected version, including babel. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
babel PyPI | All versions | 2.9.1 |
babel PyPI | All versions | 2.9.1 |
babel PyPI | All versions | 2.9.1 |
Linux distribution packages (29)
python-Babel SUSE:Enterprise Storage 6 | All versions | 2.5.1-150000.3.3.1 |
python-Babel SUSE:HPE Helion OpenStack 8 | All versions | 2.3.4-4.3.1 |
python-Babel SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | All versions | 2.5.1-150000.3.3.1 |
python-Babel SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 2.5.1-150000.3.3.1 |
python-Babel SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 2.5.1-150000.3.3.1 |
python-Babel SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 2.5.1-150000.3.3.1 |
python-Babel SUSE:Linux Enterprise Micro 5.0 | All versions | 2.8.0-3.3.1 |
python-Babel SUSE:Linux Enterprise Micro 5.1 | All versions | 2.8.0-3.3.1 |
python-Babel SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 2.8.0-3.3.1 |
python-Babel SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 2.8.0-3.3.1 |
python-Babel SUSE:Linux Enterprise Module for Public Cloud 12 | All versions | 2.5.3-4.8.1 |
python-Babel SUSE:Linux Enterprise Module for Python 2 15 SP2 | All versions | 2.8.0-3.3.1 |
python-Babel SUSE:Linux Enterprise Module for Python 2 15 SP3 | All versions | 2.8.0-3.3.1 |
python-Babel SUSE:Linux Enterprise Server 15 SP1-BCL | All versions | 2.5.1-150000.3.3.1 |
python-Babel SUSE:Linux Enterprise Server 15 SP1-LTSS | All versions | 2.5.1-150000.3.3.1 |
python-Babel SUSE:Linux Enterprise Server 15-LTSS | All versions | 2.5.1-150000.3.3.1 |
python-Babel SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 2.5.1-150000.3.3.1 |
python-Babel SUSE:Linux Enterprise Server for SAP Applications 15 SP1 | All versions | 2.5.1-150000.3.3.1 |
python-Babel SUSE:OpenStack Cloud 8 | All versions | 2.3.4-4.3.1 |
python-Babel SUSE:OpenStack Cloud 9 | All versions | 2.5.1-3.3.1 |
python-Babel SUSE:OpenStack Cloud Crowbar 8 | All versions | 2.3.4-4.3.1 |
python-Babel SUSE:OpenStack Cloud Crowbar 9 | All versions | 2.5.1-3.3.1 |
python-Babel openSUSE:Leap 15.2 | All versions | 2.8.0-lp152.2.3.1 |
python-Babel-doc openSUSE:Leap 15.2 | All versions | 2.8.0-lp152.2.3.1 |
python-Babel openSUSE:Leap 15.3 | All versions | 2.8.0-3.3.1 |
python-Babel-doc openSUSE:Leap 15.3 | All versions | 2.8.0-3.3.1 |
python-Babel openSUSE:Tumbleweed | All versions | 2.14.0-1.5 |
python-Babel openSUSE:Tumbleweed | All versions | 2.18.0-1.4 |
python-Babel openSUSE:Tumbleweed | All versions | 2.9.1-3.1 |
Products include Debian Debian Linux, Pocoo Babel.
How do I fix CVE-2021-42771?
Upgrade babel to 2.9.1 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-42771 being exploited?
There is no known exploitation of CVE-2021-42771 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALPINE-CVE-2021-42771, AZL-6325, CLSA-2026-1777451880, DEBIAN-CVE-2021-42771, DLA-2790-1, DSA-5018-1 and 13 more.