Postgresql: role pg_signal_backend can signal certain superuser processes.

2.2 CVSS

Vulnerability Description

A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Upstream acknowledges Hemanth Sandrana and Mahendrakar Srinivasarao as the original reporters.

References

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Affected Vendor

Red Hat

View all reports →

Affected Software

Red Hat Advanced Cluster Security 4.2, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.2 Telecommunications Update Service, Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Enterprise Linux 8.8 Extended Update Support, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat Software Collections for Red Hat Enterprise Linux 7, RHACS-3.74-RHEL-8, RHACS-4.1-RHEL-8, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Software Collections

Vulnerable Versions:

4.2.4-6, 4.2.4-7, 8090020231114113712.a75119d5, 8090020231128173330.a75119d5, 8090020231114113548.a75119d5, 8020020231128165246.4cda2c84, 8040020231127153301.522a0ee4, 8040020231127154806.522a0ee4, 8060020231114115246.ad008a3a, 8060020231128165328.ad008a3a, 8080020231114105206.63b34585, 8080020231128165335.63b34585, 8080020231113134015.63b34585, 0:13.13-1.el9_3, 9030020231120082734.rhel9, 0:13.13-1.el9_0, 0:13.13-1.el9_2, 9020020231115020618.rhel9, 0:12.17-1.el7, 0:13.13-1.el7, 3.74.8-9, 3.74.8-7, 4.1.6-6