CVE-2001-0833

Vulnerability

Buffer overflow in the otrcrep executable shipped with Oracle versions 8.0.x through 9.0.1 on Unix platforms. The overflow occurs when a long ORACLE_HOME environment variable is supplied, causing memory corruption before proper bounds checking. The vulnerable code path is reachable when a local user invokes otrcrep under a shell where ORACLE_HOME has been set to an overly long string. This issue is classified as the "Oracle Trace Collection Security Vulnerability" and affects all versions of Oracle running on Unix for the given range [1].

Exploitation

To exploit, a local attacker must have the ability to set an environment variable for a setuid binary (otrcrep). The attacker sets ORACLE_HOME to a crafted value exceeding the buffer size (~1024 bytes), then executes otrcrep. The setuid privilege of the binary may be required to gain elevated access. No authentication or special privileges beyond local shell access are needed. The exploit sequence is: set the environment variable, run the vulnerable binary, and trigger the overflow with a payload that overwrites the stack return address or other control data to redirect execution [1].

Impact

Successful exploitation allows a local user to execute arbitrary code with the privileges of the otrcrep process (likely oracle user or database admin group). This can lead to full disclosure of database data, modification of database files, or system-level access. The attacker gains the ability to run commands at the elevated privilege level of the Oracle software owner, potentially compromising the entire database instance [1].

Mitigation

Oracle released a security alert in October 2001 but no explicit patch version was documented for this specific issue in the available references. The recommended workaround is to restrict access to the ORACLE_HOME directory to database administrators only by setting directory permissions to 770. Additionally, removing the setuid bit from the oracle executable may mitigate but can break Oracle functionality. Best practice is to prevent ordinary users from running SQL*Plus or Oracle tools directly on the server, enforcing a client-server model. This vulnerability is not listed on the CISA KEV as of this writing [1].