CVE-2021-23423 Directory Traversal
An attacker can disclose arbitrary file contents by processing untrusted source files with include directives in the bikeshed documentation tool.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-23423?
CVE-2021-23423 is a medium-severity path traversal vulnerability in bikeshed, published on 16 Aug 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
This affects the package bikeshed before 3.0.0. This can occur when an untrusted source file containing include, include-code or include-raw block is processed. The contents of arbitrary files could be disclosed in the HTML output.
Weakness: CWE-22
Which versions are affected by CVE-2021-23423?
3 open source packages ship an affected version, including bikeshed. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
bikeshed PyPI | All versions | 3.0.0 |
bikeshed PyPI | All versions | 3.0.0 |
bikeshed PyPI | All versions | 3.0.0 |
Products include Bikeshed Project Bikeshed.
How do I fix CVE-2021-23423?
Upgrade bikeshed to 3.0.0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-23423 being exploited?
There is no known exploitation of CVE-2021-23423 in the wild and no public exploit code.
Other vulnerabilities in bikeshed
Sources
Also known as GHSA-hf6p-4rv2-9qrp, PYSEC-2021-117, SNYK-PYTHON-BIKESHED-1537647, UBUNTU-CVE-2021-23423.