Dvije ranjivosti, otkrivene u radu paketa PostgreSQL, omogućuju zlonamjernim korisnicima zaobilaženje autentikacijskih mehanizama te izazivanje stanja uskraćivanja usluge (eng. Denial of Service).
Paket:
PostgreSQL 8.x, PostgreSQL 9.x
Operacijski sustavi:
Ubuntu Linux 8.04, Ubuntu Linux 10.04, Ubuntu Linux 11.04, Ubuntu Linux 11.10, Ubuntu Linux 12.04
Kritičnost:
5
Problem:
neodgovarajuća provjera ulaznih podataka, pogreška u programskoj funkciji
Iskorištavanje:
udaljeno
Posljedica:
neovlašteni pristup sustavu, uskraćivanje usluga (DoS), zaobilaženje postavljenih ograničenja
Rješenje:
programska zakrpa proizvođača
CVE:
CVE-2012-2143, CVE-2012-2655
Izvorni ID preporuke:
USN-1461-1
Izvor:
Ubuntu
Problem:
Ranjivosti su uzrokovane nepravilnostima unutar funkcije "crypt()" te pri rukovanju "SECURITY DEFINER" i "SET" atributima.
Posljedica:
Napadač bi mogao iskoristiti propuste za zaobilaženje sigurnosnih ograničenja te za izvođenje DoS napada.
Rješenje:
Svim se korisnicima savjetuje instalacija nadogradnji.
==========================================================================
Ubuntu Security Notice USN-1461-1
June 05, 2012
postgresql-8.3, postgresql-8.4, postgresql-9.1 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
Summary:
PostgreSQL could be made to crash or incorrectly handle authentication.
Software Description:
- postgresql-9.1: Object-relational SQL database
- postgresql-8.4: Object-relational SQL database
- postgresql-8.3: Object-relational SQL database
Details:
It was discovered that PostgreSQL incorrectly handled certain bytes passed
to the crypt() function when using DES encryption. An attacker could use
this flaw to incorrectly handle authentication. (CVE-2012-2143)
It was discovered that PostgreSQL incorrectly handled SECURITY DEFINER and
SET attributes on procedural call handlers. An attacker could use this flaw
to cause PostgreSQL to crash, leading to a denial of service.
(CVE-2012-2655)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 LTS:
postgresql-9.1 9.1.4-0ubuntu12.04
Ubuntu 11.10:
postgresql-9.1 9.1.4-0ubuntu11.10
Ubuntu 11.04:
postgresql-8.4 8.4.12-0ubuntu11.04
Ubuntu 10.04 LTS:
postgresql-8.4 8.4.12-0ubuntu10.04
Ubuntu 8.04 LTS:
postgresql-8.3 8.3.19-0ubuntu8.04
This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.
References:
http://www.ubuntu.com/usn/usn-1461-1
CVE-2012-2143, CVE-2012-2655
Package Information:
https://launchpad.net/ubuntu/+source/postgresql-9.1/9.1.4-0ubuntu12.04
https://launchpad.net/ubuntu/+source/postgresql-9.1/9.1.4-0ubuntu11.10
https://launchpad.net/ubuntu/+source/postgresql-8.4/8.4.12-0ubuntu11.04
https://launchpad.net/ubuntu/+source/postgresql-8.4/8.4.12-0ubuntu10.04
https://launchpad.net/ubuntu/+source/postgresql-8.3/8.3.19-0ubuntu8.04
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