CVE-2021-39947 Information disclosure in GitLab Runner
Attackers can read sensitive data from other jobs due to trace file buffer reuse mixing outputs in GitLab Runner.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-39947?
CVE-2021-39947 is a medium-severity vulnerability in GitLab Runner, published on 6 Jun 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In specific circumstances, trace file buffers in GitLab Runner versions up to 14.3.4, 14.4 to 14.4.2, and 14.5 to 14.5.2 would re-use the file descriptor 0 for multiple traces and mix the output of several jobs
Which versions are affected by CVE-2021-39947?
It affects 1 product.
Products include Gitlab Gitlab Runner.
How do I fix CVE-2021-39947?
No fix has been published for CVE-2021-39947 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-39947 being exploited?
There is no known exploitation of CVE-2021-39947 in the wild and no public exploit code.
Sources
Also known as GHSA-hwx9-v7rw-v3qm, UBUNTU-CVE-2021-39947.