CVE-2020-25696

A flaw was found in the psql interactive terminal of PostgreSQL. If an interactive psql session uses \gset when querying a compromised server, this flaw allows an attacker to execute arbitrary code as the operating system account running psql. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

In Red Hat Gluster Storage 3, PostgreSQL (embedded in rhevm-dependencies) was shipped as a part of the Red Hat Gluster Storage Console that is no longer supported for use with Red Hat Gluster Storage 3.5. Red Hat Gluster Storage Web Administration is now the recommended monitoring tool for Red Hat Storage Gluster clusters. In Red Hat Virtualization, the manager appliance uses a vulnerable version of postgresql. Once a fix has been shipped for RHEL 8 the appliance can consume the fix via a regular yum update.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Using \gset with a prefix not found among specially treated variables, e.g. any lowercase string, precludes the attack in an unpatched psql.