SB20200930114 - openEuler 20.03 LTS update for postgresql

Description

This security bulletin contains information about 3 vulnerabilities.

1) Untrusted search path (CVE-ID: CVE-2020-14349)

CWE-ID: CWE-426 - Untrusted Search Path

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote user to escalate privileges within the database.

The vulnerability exists due to the way PostgreSQL handles search_path during replications. Users of a replication publisher or subscriber database can create objects in the public schema and harness them to execute arbitrary SQL functions under the identity running replication, often a superuser.

2) Untrusted search path (CVE-ID: CVE-2020-14350)

CWE-ID: CWE-426 - Untrusted Search Path

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote user to escalate privileges within the database.

The vulnerability exists due to the way PostgreSQL handles CREATE EXTENSION statements. A remote user with permission to create objects in the new extension's schema or a schema of a prerequisite extension can execute arbitrary SQL functions under the identity of the superuser in certain cases.

3) Privilege escalation (CVE-ID: CVE-2018-1058)

CWE-ID: CWE-427 - Uncontrolled Search Path Element

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists in the pg_dump function due to improper security restrictions. A local attacker can submit a malicious function in separate namespaces and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1067