CVE-2020-26943 Arbitrary Code Execution in blazar-dashboard
A user with dashboard access can execute arbitrary code on the Horizon host via Python eval, leading to service compromise.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-26943?
CVE-2020-26943 is a critical code injection vulnerability in n/a, published on 16 Oct 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in OpenStack blazar-dashboard before 1.3.1, 2.0.0, and 3.0.0. A user allowed to access the Blazar dashboard in Horizon may trigger code execution on the Horizon host as the user the Horizon service runs under (because the Python eval function is used). This may result in Horizon host unauthorized access and further compromise of the Horizon service. All setups using the Horizon dashboard with the blazar-dashboard plugin are affected.
Which versions are affected by CVE-2020-26943?
7 open source packages ship an affected version, including blazar-dashboard. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
blazar-dashboard PyPI | All versions | 1.3.1, 2.0.1, 3.0.1 |
blazar-dashboard PyPI | All versions | 1.3.1 |
blazar-dashboard PyPI | All versions | 1.3.1 |
blazar-dashboard PyPI | From 2.0.0 | 2.0.1 |
blazar-dashboard PyPI | From 2.0.0 | 2.0.1 |
blazar-dashboard PyPI | From 3.0.0 | 3.0.1 |
1 more packages
blazar-dashboard PyPI | From 3.0.0 | 3.0.1 |
Products include Openstack Blazar-Dashboard.
How do I fix CVE-2020-26943?
Upgrade blazar-dashboard to a fixed version for your release line: 1.3.1, 2.0.1 or 3.0.1.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2020-26943 being exploited?
There is no known exploitation of CVE-2020-26943 in the wild and no public exploit code.
Sources
Also known as GHSA-939m-4xpw-v34v, PYSEC-2020-225.