CVE-1999-0273: Medium severity Sun SunOS vulnerability
Denial of service through Solaris 2.5.1 telnet by sending ^D characters.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Remove
Remove
SunOS telnet daemonfrom your environment.Uninstall or remove the telnet daemon/package from affected systems if telnet is not required.
- Configuration
Disable the telnet service on affected hosts (stop telnetd and disable any startup/inetd entries) to prevent the denial-of-service vector.
SunOS (Solaris 2.5.1) telnet service telnet_service_enabled = false - Compensating control
Block or filter incoming TCP port 23 (telnet) at the network perimeter/firewall or restrict telnet access to trusted management networks to prevent remote exploitation.
- Operational
If telnet must remain temporarily, monitor for denial-of-service activity targeting telnet, and stop or isolate affected hosts and services immediately if exploitation is detected before applying permanent mitigations.
Event History
Frequently Asked Questions
What is the severity of CVE-1999-0273?
CVE-1999-0273 is classified as a denial of service vulnerability.
How do I fix CVE-1999-0273?
To mitigate CVE-1999-0273, consider applying patches provided by the vendor or updating to a more secure version of the software.
Which systems are affected by CVE-1999-0273?
CVE-1999-0273 affects Solaris 2.5.1, specifically systems running SunOS 5.5.1.
What type of attack does CVE-1999-0273 represent?
CVE-1999-0273 represents a denial of service attack that disrupts telnet services.
Is CVE-1999-0273 still a relevant vulnerability?
Although CVE-1999-0273 is an older vulnerability, systems still running affected versions may still be at risk.