CVE-2003-0269

youbin - Local Privilege Escalation via HOME Environment Variable

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2003-0269. PoCs published by Knud Erik Hojgaard.

AI-analyzed exploit summary This exploit targets a local buffer overflow in youbin (version 3.4) by overflowing the HOME environment variable with a crafted return address and shellcode. The shellcode executes a setuid(0) followed by an execve('/bin/sh') to gain root privileges.

Description

Buffer overflow in youbin allows local users to gain privileges via a long HOME environment variable.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Knud Erik Hojgaard · perllocalfreebsd
https://www.exploit-db.com/exploits/22566

This exploit targets a local buffer overflow in youbin (version 3.4) by overflowing the HOME environment variable with a crafted return address and shellcode. The shellcode executes a setuid(0) followed by an execve('/bin/sh') to gain root privileges.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: youbin 3.4
No auth needed
Prerequisites: Local access to the target system · youbin installed and executable by the attacker
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/11949
Third Party Advisory mailing-list x_refsource_vulnwatch
http://archives.neohapsis.com/archives/vulnwatch/2003-q2/0053.html
Exploit, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/7503
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=105223947528794&w=2
Mailing List mailing-list x_refsource_fulldisc
http://lists.grok.org.uk/pipermail/full-disclosure/2003-May/004892.html

Scores

EPSS 0.0099
EPSS Percentile 57.8%

Details

Status published
Products (3)
youbin/youbin 2.5
youbin/youbin 3.0
youbin/youbin 3.4
Published May 27, 2003
Tracked Since Feb 18, 2026