CVE-2023-43116 Buildkite Elastic CI for AWS symbolic link following vulnerability
A local attacker can change ownership of arbitrary directories via symlink following in the Buildkite agent permissions script.
- 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-2023-43116?
CVE-2023-43116 is a high-severity path traversal vulnerability in n/a, published on 22 Dec 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A symbolic link following vulnerability in Buildkite Elastic CI for AWS versions prior to 6.7.1 and 5.22.5 allows the buildkite-agent user to change ownership of arbitrary directories via the PIPELINE_PATH variable in the fix-buildkite-agent-builds-permissions script.
Weakness: CWE-59
Which versions are affected by CVE-2023-43116?
2 open source packages ship an affected version, including github.com/buildkite/elastic-ci-stack-for-aws/v6. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/buildkite/elastic-ci-stack-for-aws/v6 Go | All versions | 6.7.0 |
github.com/buildkite/elastic-ci-stack-for-aws/v6 Go | All versions | 6.7.0 |
Products include Buildkite Elastic Ci Stack.
How do I fix CVE-2023-43116?
Upgrade github.com/buildkite/elastic-ci-stack-for-aws/v6 to 6.7.0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2023-43116 being exploited?
There is no known exploitation of CVE-2023-43116 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-7c44-7j7v-w554.