Exploitation Summary
EIP tracks 1 public exploit for CVE-1999-0893. PoCs published by Brock Tellier.
AI-analyzed exploit summary This exploit demonstrates a symlink vulnerability in SCO OpenServer's userOsa executable, allowing an attacker to overwrite group-writable files (e.g., /etc/shadow.old) by creating a symlink to the target file and triggering debug log generation.
Description
userOsa in SCO OpenServer allows local users to corrupt files via a symlink attack.
Exploits (1)
exploitdb
WORKING POC
VERIFIED
by Brock Tellier · textlocalsco
https://www.exploit-db.com/exploits/19542
This exploit demonstrates a symlink vulnerability in SCO OpenServer's userOsa executable, allowing an attacker to overwrite group-writable files (e.g., /etc/shadow.old) by creating a symlink to the target file and triggering debug log generation.
Classification
Working Poc 90%
Attack Type
Other
Complexity
Trivial
Reliability
Reliable
Target:
SCO OpenServer (specific versions not specified)
No auth needed
Prerequisites:
Access to a system running vulnerable SCO OpenServer · Ability to create symlinks in a writable directory
MITRE ATT&CK
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-1999-0893
Scores
EPSS
0.0070
EPSS Percentile
48.1%
Details
Status
published
Products (1)
sco/openserver
5.0
Published
Oct 11, 1999
Tracked Since
Feb 18, 2026