Oracle TNS authentication AUTH_ALTER_SESSION SQL command execution
| oracle-login-command-execute (24184) |  High Risk |
Description:
Oracle Database could allow a remote attacker with create session privileges to execute arbitrary SQL commands with elevated privileges. The AUTH_ALTER_SESSION value used during the TNS authentication process is executed with SYS user privileges. A remote attacker could insert arbitrary SQL statements into this value during authentication, which would be executed with SYS user privileges, allowing the attacker to add, modify, or delete information in the database.
Platforms Affected:
- Oracle, Database Server 10.1.0.3 R1
- Oracle, Database Server 10.1.0.4 R1
- Oracle, Database Server 10.1.0.5 R1
- Oracle, Database Server 10.2.0.1 R2
- Oracle, Database Server 8.1.7.4 R3
- Oracle, Database Server 9.2.0.6 R2
- Oracle, Database Server 9.2.0.7 R2
Remedy:
Refer to Oracle Critical Patch Update - January 2006 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Gain Privileges
References:
- Full-Disclosure Mailing List, Tue Jan 17 2006 - 14:36:33 CST, Oracle DBMS - Access Control Bypass in Login at http://archives.neohapsis.com/archives/fulldisclosure/2006-01/0575.html.
- Oracle Web site, Oracle Critical Patch Update - January 2006 at http://www.oracle.com/technology/deploy/security/pdf/cpujan2006.html.
- CVE-2006-0547: Oracle Database 8i, 9i, and 10g allow remote authenticated users to execute arbitrary SQL statements in the context of the SYS user and bypass audit logging, including statements to create new privileged database accounts, via a modified AUTH_ALTER_SESSION attribute in the authentication phase of the Transparent Network Substrate (TNS) protocol. NOTE: due to the lack of relevant details from the Oracle advisory, a separate CVE is being created since it cannot be conclusively proven that this issue has been addressed by Oracle. It is possible that this is the same issue as Oracle Vuln# DB18 from the January 2006 CPU, in which case this would be subsumed by CVE-2006-0265.
- US-CERT VU#871756: Oracle TNS protocol fails to properly validate authentication requests
Reported:
Jan 17, 2006
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