# CVE-1999-1213: HP HP-UX denial of service in telnet service

Source: https://junglewise.ai/threats/cve-1999-1213-hp-hp-ux-denial-of-service-in-telnet-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 1997-10-01. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-1999-1213 · Severity: medium · CVSS 5 · Published 1997-10-01

A vulnerability in the telnet service of HP-UX 10.30 allows remote attackers to disrupt the availability of the system. By exploiting this flaw, an attacker can cause a denial of service, preventing legitimate users from accessing the server remotely. This could impact business operations by disabling remote management and access to critical legacy infrastructure.

Technologies: [Hp-Ux](https://junglewise.ai/threats/technologies/hp-ux). Vendors: [Hp](https://junglewise.ai/threats/vendors/hp).

## Quick answers

**Is CVE-1999-1213 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-1999-1213 being exploited in the wild.

**How severe is CVE-1999-1213?** Medium severity, with a CVSS score of 5, published 1 October 1997.

**Which products and versions are affected?** HP HP-UX 10.30.

**Is there a fix for CVE-1999-1213?** 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-1999-1213 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-1999-1213?** Check whether you run Hp-Ux. 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 denial of service vulnerability exists in the telnet daemon (telnetd) of HP-UX version 10.30. The flaw allows a remote, unauthenticated attacker to send specially crafted requests or sequences to the telnet service, leading to a service crash or hang. This is a network-based attack that requires no user interaction or prior authentication. Successful exploitation results in the loss of availability for the telnet service on the affected host. While specific root cause details (such as a buffer overflow or resource exhaustion) are not detailed in the legacy advisory, the primary impact is limited to service disruption.

## Affected products

- HP HP-UX 10.30

## Timeline

- 1997-10-01: disclosed: Initial publication date

## References

- [http://www2.dataguard.no/bugtraq/1997_4/0001.html](http://www2.dataguard.no/bugtraq/1997_4/0001.html)
- [https://exchange.xforce.ibmcloud.com/vulnerabilities/571](https://exchange.xforce.ibmcloud.com/vulnerabilities/571)

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