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.
The product does not properly control the allocation and maintenance of a limited resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Postgresql | Postgresql | 11.0 (including) | 11.22 (excluding) |
| Postgresql | Postgresql | 12.0 (including) | 12.17 (excluding) |
| Postgresql | Postgresql | 13.0 (including) | 13.13 (excluding) |
| Postgresql | Postgresql | 14.0 (including) | 14.10 (excluding) |
| Postgresql | Postgresql | 15.0 (including) | 15.5 (excluding) |
| Postgresql | Postgresql | 16.0 (including) | 16.0 (including) |
| Red Hat Advanced Cluster Security 4.2 | RedHat | advanced-cluster-security/rhacs-central-db-rhel8:4.2.4-6 | * |
| Red Hat Advanced Cluster Security 4.2 | RedHat | advanced-cluster-security/rhacs-main-rhel8:4.2.4-6 | * |
| Red Hat Advanced Cluster Security 4.2 | RedHat | advanced-cluster-security/rhacs-operator-bundle:4.2.4-7 | * |
| Red Hat Advanced Cluster Security 4.2 | RedHat | advanced-cluster-security/rhacs-scanner-db-rhel8:4.2.4-6 | * |
| Red Hat Advanced Cluster Security 4.2 | RedHat | advanced-cluster-security/rhacs-scanner-db-slim-rhel8:4.2.4-7 | * |
| Red Hat Enterprise Linux 8 | RedHat | postgresql:13-8090020231114113712.a75119d5 | * |
| Red Hat Enterprise Linux 8 | RedHat | postgresql:12-8090020231128173330.a75119d5 | * |
| Red Hat Enterprise Linux 8 | RedHat | postgresql:15-8090020231114113548.a75119d5 | * |
| Red Hat Enterprise Linux 8.2 Advanced Update Support | RedHat | postgresql:12-8020020231128165246.4cda2c84 | * |
| Red Hat Enterprise Linux 8.2 Telecommunications Update Service | RedHat | postgresql:12-8020020231128165246.4cda2c84 | * |
| Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions | RedHat | postgresql:12-8020020231128165246.4cda2c84 | * |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | RedHat | postgresql:12-8040020231127153301.522a0ee4 | * |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | RedHat | postgresql:13-8040020231127154806.522a0ee4 | * |
| Red Hat Enterprise Linux 8.4 Telecommunications Update Service | RedHat | postgresql:12-8040020231127153301.522a0ee4 | * |
| Red Hat Enterprise Linux 8.4 Telecommunications Update Service | RedHat | postgresql:13-8040020231127154806.522a0ee4 | * |
| Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions | RedHat | postgresql:12-8040020231127153301.522a0ee4 | * |
| Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions | RedHat | postgresql:13-8040020231127154806.522a0ee4 | * |
| Red Hat Enterprise Linux 8.6 Extended Update Support | RedHat | postgresql:13-8060020231114115246.ad008a3a | * |
| Red Hat Enterprise Linux 8.6 Extended Update Support | RedHat | postgresql:12-8060020231128165328.ad008a3a | * |
| Red Hat Enterprise Linux 8.8 Extended Update Support | RedHat | postgresql:13-8080020231114105206.63b34585 | * |
| Red Hat Enterprise Linux 8.8 Extended Update Support | RedHat | postgresql:12-8080020231128165335.63b34585 | * |
| Red Hat Enterprise Linux 8.8 Extended Update Support | RedHat | postgresql:15-8080020231113134015.63b34585 | * |
| Red Hat Enterprise Linux 9 | RedHat | postgresql-0:13.13-1.el9_3 | * |
| Red Hat Enterprise Linux 9 | RedHat | postgresql:15-9030020231120082734.rhel9 | * |
| Red Hat Enterprise Linux 9.0 Extended Update Support | RedHat | postgresql-0:13.13-1.el9_0 | * |
| Red Hat Enterprise Linux 9.2 Extended Update Support | RedHat | postgresql-0:13.13-1.el9_2 | * |
| Red Hat Enterprise Linux 9.2 Extended Update Support | RedHat | postgresql:15-9020020231115020618.rhel9 | * |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | RedHat | rh-postgresql12-postgresql-0:12.17-1.el7 | * |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | RedHat | rh-postgresql13-postgresql-0:13.13-1.el7 | * |
| RHACS-3.74-RHEL-8 | RedHat | advanced-cluster-security/rhacs-central-db-rhel8:3.74.8-9 | * |
| RHACS-3.74-RHEL-8 | RedHat | advanced-cluster-security/rhacs-main-rhel8:3.74.8-9 | * |
| RHACS-3.74-RHEL-8 | RedHat | advanced-cluster-security/rhacs-operator-bundle:3.74.8-7 | * |
| RHACS-3.74-RHEL-8 | RedHat | advanced-cluster-security/rhacs-scanner-db-rhel8:3.74.8-9 | * |
| RHACS-3.74-RHEL-8 | RedHat | advanced-cluster-security/rhacs-scanner-db-slim-rhel8:3.74.8-9 | * |
| RHACS-4.1-RHEL-8 | RedHat | advanced-cluster-security/rhacs-central-db-rhel8:4.1.6-6 | * |
| RHACS-4.1-RHEL-8 | RedHat | advanced-cluster-security/rhacs-main-rhel8:4.1.6-6 | * |
| RHACS-4.1-RHEL-8 | RedHat | advanced-cluster-security/rhacs-operator-bundle:4.1.6-6 | * |
| RHACS-4.1-RHEL-8 | RedHat | advanced-cluster-security/rhacs-scanner-db-rhel8:4.1.6-6 | * |
| RHACS-4.1-RHEL-8 | RedHat | advanced-cluster-security/rhacs-scanner-db-slim-rhel8:4.1.6-6 | * |
| Postgresql-10 | Ubuntu | bionic | * |
| Postgresql-10 | Ubuntu | esm-infra/bionic | * |
| Postgresql-10 | Ubuntu | upstream | * |
| Postgresql-12 | Ubuntu | esm-infra/focal | * |
| Postgresql-12 | Ubuntu | focal | * |
| Postgresql-12 | Ubuntu | trusty | * |
| Postgresql-12 | Ubuntu | upstream | * |
| Postgresql-14 | Ubuntu | jammy | * |
| Postgresql-14 | Ubuntu | upstream | * |
| Postgresql-15 | Ubuntu | lunar | * |
| Postgresql-15 | Ubuntu | mantic | * |
| Postgresql-15 | Ubuntu | upstream | * |
| Postgresql-16 | Ubuntu | upstream | * |
| Postgresql-9.1 | Ubuntu | trusty | * |
| Postgresql-9.3 | Ubuntu | trusty | * |
| Postgresql-9.3 | Ubuntu | trusty/esm | * |
| Postgresql-9.3 | Ubuntu | upstream | * |
| Postgresql-9.5 | Ubuntu | esm-infra/xenial | * |
| Postgresql-9.5 | Ubuntu | upstream | * |
| Postgresql-9.5 | Ubuntu | xenial | * |
Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.