CVE-2021-25684 apport can be stalled by reading a FIFO
An attacker can cause the apport crash reporting tool to hang by directing it to read from a FIFO, leading to a denial of service.
- 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-2021-25684?
CVE-2021-25684 is a high-severity denial of service vulnerability in Canonical apport, published on 11 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
It was discovered that apport in data/apport did not properly open a report file to prevent hanging reads on a FIFO.
Weakness: CWE-20
Which versions are affected by CVE-2021-25684?
It affects 1 product.
Products include Canonical Apport.
How do I fix CVE-2021-25684?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-25684 being exploited?
There is no known exploitation of CVE-2021-25684 in the wild and no public exploit code.
Other vulnerabilities in Canonical apport
Sources
Also known as GHSA-5wpx-42qp-2c7p, UBUNTU-CVE-2021-25684.