CVE intelligence and bounded remediation

CVE-2023-5869 — Postgresql Postgresql security vulnerability

High CVSS 8.8

A flaw was found in PostgreSQL that allows authenticated database users to execute arbitrary code through missing overflow checks during SQL array value modification. This issue exists due to an integer overflow during array modification where a remote user can trigger the overflow by providing specially crafted data. This enables the execution of arbitrary code on the target system, allowing users to write arbitrary bytes to memory and extensively read the server's memory.

Severity
High
CVSS
8.8 (3.1)
Published
2023-12-10
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-190

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 49 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Command, code, expression, and template injection

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Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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