CVE-1999-0821: Medium severity FreeBSD FreeBSD vulnerability
FreeBSD seyon allows local users to gain privileges by providing a malicious program in the -emulator argument.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Remove
Remove
freebsd/seyonfrom your environment.Uninstall or remove the 'seyon' program from affected FreeBSD systems if it is not required.
- Compensating control
Prevent unprivileged users from executing seyon or supplying arguments to it by restricting filesystem and execution permissions (limit execution to trusted administrative accounts) and restrict local account access to trusted users.
- Operational
Investigate systems for signs of local privilege escalation and review logs for suspicious use of seyon; if compromise is suspected, perform incident response (containment, eradication, recovery) before restoring service.
Event History
Frequently Asked Questions
What is the severity of CVE-1999-0821?
CVE-1999-0821 is considered a local privilege escalation vulnerability.
How do I fix CVE-1999-0821?
To fix CVE-1999-0821, users should update to a newer version of FreeBSD that does not contain this vulnerability.
Who is affected by CVE-1999-0821?
Local users running FreeBSD 3.3 are affected by CVE-1999-0821.
What type of vulnerability is CVE-1999-0821?
CVE-1999-0821 is a local vulnerability that allows users to execute a malicious program to gain elevated privileges.
Is CVE-1999-0821 still a threat today?
CVE-1999-0821 is an older vulnerability, and while it might not be a current threat, systems still running the affected version could be at risk.