CVE-2021-32555: apport read_file() function could follow maliciously constructed symbolic links
First published: Sat Jun 12 2021(Updated: )
It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the xorg-hwe-18.04 package apport hooks, it could expose private data to other local users.
Credit: security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ubuntu | =18.04 | |
| Ubuntu | =20.04 | |
| Ubuntu | =20.10 | |
| Ubuntu | =21.04 | |
| Ubuntu | =21.10 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Frequently Asked Questions
What is the severity of CVE-2021-32555?
CVE-2021-32555 has a medium severity rating, as it can expose private data to local users.
How do I fix CVE-2021-32555?
To fix CVE-2021-32555, ensure you update your Ubuntu system to the latest patched version.
What systems are affected by CVE-2021-32555?
CVE-2021-32555 affects Ubuntu Linux versions 18.04, 20.04, 20.10, 21.04, and 21.10.
What does CVE-2021-32555 exploit?
CVE-2021-32555 exploits the read_file() function in apport/hookutils.py, allowing access to private data via symbolic links.
Is user data at risk due to CVE-2021-32555?
Yes, CVE-2021-32555 can potentially expose user data to other local users on the affected Ubuntu systems.
- agent/weakness
- agent/type
- agent/severity
- agent/title
- agent/references
- agent/author
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/first-publish-date
- agent/event
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/canonical
- canonical/ubuntu
- version/ubuntu/18.04
- version/ubuntu/20.04
- version/ubuntu/20.10
- version/ubuntu/21.04
- version/ubuntu/21.10