# CVE-1999-1251: HP HP-UX denial of service in direct audio user space code

Source: https://junglewise.ai/threats/cve-1999-1251-hp-hp-ux-denial-of-service-in-direct-audio-user-space-code  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 1996-12-24. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-1999-1251 · Severity: low · CVSS 2.1 · Published 1996-12-24

A vulnerability in the audio management software of HP-UX systems allows a local user to disrupt the system's audio services. This could lead to a denial of service where the audio functionality becomes unavailable to other users or applications. While it does not allow for data theft, it can impact operations that rely on sound or system stability.

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

## Quick answers

**Is CVE-1999-1251 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-1999-1251 being exploited in the wild.

**How severe is CVE-1999-1251?** Low severity, with a CVSS score of 2.1, published 24 December 1996.

**Which products and versions are affected?** Hp-Ux 10.10, 10.20.

**Is there a fix for CVE-1999-1251?** 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-1999-1251 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-1999-1251?** Check whether you run Hp-Ux at an affected version. 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 direct audio user space code of HP-UX versions 10.10 and 10.20. The flaw allows a local attacker with system access to trigger a condition that crashes or hangs the audio subsystem. The attack vector is local, requiring the user to already have an account or access to the machine. Successful exploitation results in a loss of availability for audio services, though it does not appear to facilitate privilege escalation or data disclosure. HP released an advisory (HPSBUX9701-056) regarding this issue in 1996.

## Affected products

- HP HP-UX 10.10, 10.20

## Timeline

- 1996-12-24: disclosed: Initial publication of the vulnerability details.
- 1996-12-24: advisory: NVD published date.

## References

- [http://packetstormsecurity.org/advisories/hpalert/043](http://packetstormsecurity.org/advisories/hpalert/043)
- [https://exchange.xforce.ibmcloud.com/vulnerabilities/2010](https://exchange.xforce.ibmcloud.com/vulnerabilities/2010)

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