CVE-1999-0306

HP VVOS - Buffer Overflow in xlock Program

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-1999-0306. PoCs published by cesaro, BeastMaster.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in xlock (CVE-1999-0306) to achieve local privilege escalation. It crafts a malicious buffer with NOP sleds and shellcode to spawn a root shell by overflowing the buffer via the '-name' argument.

Description

buffer overflow in HP xlock program.

Exploits (2)

exploitdb WORKING POC VERIFIED
by cesaro · clocalunix
https://www.exploit-db.com/exploits/19172

This exploit targets a buffer overflow vulnerability in xlock (CVE-1999-0306) to achieve local privilege escalation. It crafts a malicious buffer with NOP sleds and shellcode to spawn a root shell by overflowing the buffer via the '-name' argument.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: xlock (version not specified, likely older versions)
No auth needed
Prerequisites: xlock must be installed · xlock must be SUID root · Attacker must have local access
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by BeastMaster · clocalunix
https://www.exploit-db.com/exploits/19173

This exploit targets a buffer overflow vulnerability in xlock (CVE-1999-0306) to achieve root access. It constructs a malicious environment variable and executes xlock with crafted arguments to trigger the overflow and execute shellcode.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: xlock (version not specified)
No auth needed
Prerequisites: Access to the target system · xlock installed · Ability to execute binaries
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References
Third Party Advisory, VDB Entry x_refsource_misc
https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0306

Scores

EPSS 0.0169
EPSS Percentile 74.0%

Details

Status published
Products (1)
hp/vvos 10.24
Published Nov 04, 1997
Tracked Since Feb 18, 2026