CVE-1999-0836

UnixWare - Arbitrary File Write via Symlink Attack

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-1999-0836. PoCs published by Brock Tellier.

AI-analyzed exploit summary This exploit leverages a symlink attack in SCO UnixWare's /usr/bin/uidadmin to overwrite /etc/security/tcb/privs, adding a malicious binary to the privileged programs list. After reboot, the binary grants a root shell by exploiting the dacwrite privilege.

Description

UnixWare uidadmin allows local users to modify arbitrary files via a symlink attack.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Brock Tellier · perllocalsco
https://www.exploit-db.com/exploits/19654

This exploit leverages a symlink attack in SCO UnixWare's /usr/bin/uidadmin to overwrite /etc/security/tcb/privs, adding a malicious binary to the privileged programs list. After reboot, the binary grants a root shell by exploiting the dacwrite privilege.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: SCO UnixWare 7.1
No auth needed
Prerequisites: Access to a UnixWare 7.1 system · Ability to execute /usr/bin/uidadmin · Write access to /tmp
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Various Sources vendor-advisory x_refsource_sco
ftp://ftp.sco.com/SSE/security_bulletins/SB-99.22a
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/842

Scores

EPSS 0.0313
EPSS Percentile 86.2%

Details

Status published
Products (4)
sco/unixware 7.0
sco/unixware 7.0.1
sco/unixware 7.1
sco/unixware 7.1.1
Published Dec 02, 1998
Tracked Since Feb 18, 2026