CVE-2023-5978: Incorrect libcap_net limitation list manipulation
First published: Wed Nov 08 2023(Updated: )
In versions of FreeBSD 13-RELEASE before 13-RELEASE-p5, under certain circumstances the cap_net libcasper(3) service incorrectly validates that updated constraints are strictly subsets of the active constraints. When only a list of resolvable domain names was specified without setting any other limitations, an application could submit a new list of domains including include entries not previously listed. This could permit the application to resolve domain names that were previously restricted.
Credit: secteam@freebsd.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FreeBSD FreeBSD | >=13.0<13.2 | |
| FreeBSD FreeBSD | =13.2 | |
| FreeBSD FreeBSD | =13.2-p1 | |
| FreeBSD FreeBSD | =13.2-p2 | |
| FreeBSD FreeBSD | =13.2-p3 | |
| FreeBSD FreeBSD | =13.2-p4 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2023-5978?
The severity of CVE-2023-5978 is high.
How does CVE-2023-5978 affect FreeBSD?
CVE-2023-5978 affects versions of FreeBSD 13-RELEASE before 13-RELEASE-p5.
What is the impact of CVE-2023-5978?
The impact of CVE-2023-5978 is that under certain circumstances, the cap_net libcasper(3) service incorrectly validates updated constraints.
How can CVE-2023-5978 be fixed?
To fix CVE-2023-5978, update to FreeBSD version 13-RELEASE-p5 or later.
Where can I find more information about CVE-2023-5978?
More information about CVE-2023-5978 can be found at https://security.freebsd.org/advisories/FreeBSD-SA-23:16.cap_net.asc.
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