CVE intelligence and bounded remediation
CVE-2023-5870 — Postgresql Postgresql security vulnerability
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.
- Severity
- Medium
- CVSS
- 4.4 (3.1)
- Published
- 2023-12-10
- CISA KEV
- Not currently listed
- Ecosystem
- software/application
- Weaknesses
- CWE-400
Affected products
- postgresql / postgresql
- postgresql / postgresql / 16.0
- redhat / codeready_linux_builder_eus / 9.2
- redhat / codeready_linux_builder_eus_for_power_little_endian_eus / 9.0_ppc64le
- redhat / codeready_linux_builder_eus_for_power_little_endian_eus / 9.2_ppc64le
- redhat / codeready_linux_builder_for_arm64_eus / 8.6_aarch64
Showing 6 representative product identities from 42 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.
Matched remediation archetype
Resource exhaustion and denial of service
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Check exposure
- Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
- Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
- Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.
Remediate safely
- Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
- Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
- Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.
Authoritative sources
Complete CVE record and remediation plan
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