Apple has released an additional security advisory and updated software to address the PostgreSQL REPLICATION privilege security bypass vulnerability.
PostgreSQL contains a vulnerability that could allow an unauthenticated, remote attacker to bypass security restrictions on a targeted system.
The vulnerability is due to improper handling of the security restriction related to the REPLICATION privilege by the affected software. An unauthenticated, remote attacker could exploit the vulnerability by transmitting crafted queries to the targeted system. Successful exploitation could allow the attacker to gain elevated privileges and execute arbitrary commands on the system.
PostgreSQL has confirmed the vulnerability and released software updates.
The following versions are affected:
PostgreSQL versions prior to 9.0.13
PostgreSQL versions prior to 9.1.9
PostgreSQL versions prior to 9.2.4
To exploit the vulnerability, the attacker may need to access trusted, internal networks to send a crafted query to the targeted system. This access requirement could reduce the likelihood of a successful exploit.
PostgreSQL has released a security update at the following link: CVE-2013-1901
Apple has released security advisories at the following links: HT5880and HT5892
VMware has released a security advisory at the following link: VMSA-2013-0005
An unauthenticated, remote attacker could exploit the vulnerability to bypass security restrictions to gain elevated privileges and could execute commands that could interfere with in-progress backups.
The vulnerability is in the pg_start_backup() and pg_stop_backup() functions. While handling REPLICATION privileges, the functions could fail to limit privileged access to the current user. This may allow the user to execute arbitrary commands with the REPLICATION privileges.
An unauthenticated, remote attacker could exploit the vulnerability by transmitting crafted queries to a targeted system. Successful exploitation could allow the attacker to gain elevated privileges and execute arbitrary commands that could interfere with in-progress backups.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
PostgreSQL has released updated versions at the following links:
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