CVE-1999-0030

SGI IRIX - Buffer Overflow in xlock

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-1999-0030.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in xlock (CVE-1999-0030) to achieve local privilege escalation. It crafts a malicious buffer with NOP sleds and shellcode to spawn a root shell, leveraging an overflow in the '-name' argument.

Description

root privileges via buffer overflow in xlock command on SGI IRIX systems.

Exploits (2)

exploitdb WORKING POC
clocalunix
https://www.exploit-db.com/exploits/19172

This exploit targets a buffer overflow vulnerability in xlock (CVE-1999-0030) to achieve local privilege escalation. It crafts a malicious buffer with NOP sleds and shellcode to spawn a root shell, leveraging an overflow in the '-name' argument.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: xlock (version not specified, likely pre-1999)
No auth needed
Prerequisites: xlock installed as suid root · xlock located at /usr/X11/bin/xlock
devstral-2 · analyzed Feb 19, 2026 Full analysis →
exploitdb WORKING POC
clocalunix
https://www.exploit-db.com/exploits/19173

This is a functional exploit for a buffer overflow vulnerability in xlock (CVE-1999-0030), which allows local privilege escalation to root by manipulating environment variables and executing shellcode. The exploit uses a brute-force approach with adjustable offsets to bypass ASLR-like protections.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Racy
Target: xlock (version not specified, likely older versions)
No auth needed
Prerequisites: Local access to the target system · xlock installed and executable · Ability to run the exploit binary
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (1)

Core 1
Core References
Third Party Advisory, VDB Entry x_refsource_misc
https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0030

Scores

EPSS 0.0043
EPSS Percentile 63.2%

Details

Status published
Products (1)
sgi/irix
Published Jul 16, 1997
Tracked Since Feb 18, 2026