CVE-1999-1211: Sun Microsystems SunOS privilege escalation in in.telnetd

CVE-1999-1211 · Severity: high · CVSS 7.2 · Published 1991-03-27

A vulnerability in the Telnet service of older SunOS operating systems allows a user who already has a basic account on the system to gain full administrative (root) control. This could allow an unauthorized individual to access any file, modify system settings, or disrupt operations. This issue primarily affects legacy systems running SunOS version 4.1.1 or older.

Technologies: Sunos. Vendors: Sun.

Quick answers

Is CVE-1999-1211 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-1999-1211 being exploited in the wild.
How severe is CVE-1999-1211?
High severity, with a CVSS score of 7.2, published 27 March 1991.
Which products and versions are affected?
Sun Microsystems SunOS 4.1.1 and earlier.
Is there a fix for CVE-1999-1211?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-1999-1211 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-1999-1211?
Check whether you run Sunos. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A vulnerability exists in the in.telnetd daemon on SunOS 4.1.1 and earlier. The flaw allows a local attacker with authenticated access to the system to exploit the Telnet service to escalate their privileges to root. While the specific technical root cause (such as a buffer overflow or environment variable manipulation) is not detailed in the summary, the impact is a complete compromise of the host's integrity, confidentiality, and availability. This is a legacy vulnerability originally disclosed in 1991. Patches were historically made available by the vendor.

Affected products

  • Sun Microsystems SunOS 4.1.1 and earlier

Timeline

  • 1991-03-27: advisory: NVD published date
  • 1991-03-27: disclosed: Original CERT advisory date

References

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