12c & external tables
10.02.2016

How to list files from directory using external table in 12c

I’ve wrote about privilege escalation with external tables in this post: https://blog.ora-600.pl/2014/12/23/simple-technics-of-privilege-escalation-part2-dbasysdba/ This time we will try to list all files within directory object, to which we have no EXECUTE privs. This is possible due to great new feature of database 12c that allows to use metacharacters to match multiple files in external table. I […]


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SECURITY
11.10.2015

Secure your database (part 1)

I’ve already showed you, how to escalate privileges in Oracle Databases. https://blog.ora-600.pl/2013/04/02/privilege-escalation-in-oracle-11gr2-part1/ https://blog.ora-600.pl/2014/12/23/simple-technics-of-privilege-escalation-part2-dbasysdba/ The question is – how to secure your database, if you don’t have EE or possibility to buy Oracle Database Vault or Oracle Advanced Security. Well – there’s always a DBA creativity 😉 For example – if you want to secure the […]


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[PL] Browar z Wyrocznią
04.09.2015

Jak smakuje Browar z Wyrocznią

I było tak, że 31 dnia miesiąca sierpnia roku 2015, spotkali się entuzjaści Wyroczni w posiadłości AVIVA. I było tak, że dzierżąc kufle – po brzegi browarem wypełnione – zasiadło wielu aby posłuchać kilku, którzy chcieli się przemyśleniami swoimi podzielić. I stało się tak, że admin przepijał do dewelopera a deweloper do admina i pospołu dyskusja toczyła się wartka a […]


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RICO
03.09.2015

RICO

I’ve started the project called RICO – the tool, written in C++ for last resort data recovery. It can be used to extract data from corrupted datafiles and dump them in the form of text files. It is in the early development stage right now and the functionalities are narrowed to: Dump regular and partitioned […]


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SECURITY
28.01.2015

Oralce uses gethostbyname in "*skgxp*" libraries [CVE-2015-0235]

Recently there was a new vulnerability introduced in glibc library: http://www.openwall.com/lists/oss-security/2015/01/27/9 Oracle is using the gethostbyname function in "*skgxp*" libraries: So this can be an issue – a specially in RAC environments. RedHat recommends to upgrade the glibc libraries: https://access.redhat.com/articles/1332213 And I do agree 😉


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SECURITY
23.12.2014

Simple technics of privilege escalation — part2: DBA=SYSDBA

A lot companies consolidates databases into one appliance – like for example Oracle Exadata. So you can have a lot of different databases in one physical cluster. And what if I tell you that you can execute any OS command as an oracle user, having just access to a database user with appropriate privileges? What […]


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SECURITY
02.04.2013

Privilege escalation in Oracle 11gR2 – part1

A few simple techniques of escalating privileges in database Oracle 11.2.0.3. http://ora-600.pl/art/oracle_privilege_escalation.pdf


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SECURITY
15.03.2013

Oracle Database Vault i szyfrowanie przstrzeni tabel VS administrator

Oracle stworzył Database Vault’a, żeby chronić wrażliwe dane przed administratorem DB. Po instalacji produktu i stworzeniu tzw. REALM’ów, SYSDBA traci uprawnienia do określonych czynności (m.in. zakładanie kont i wiele poleceń ALTER) ale głównie traci możliwość wybierania danych z tabel chronionych takim REALM’em. Sam Vault jednak nie wystarczy, bo admin mający dostęp do plików danych może […]


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