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.
CVE-2015-3887
HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence
Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-17. NVD baseline CVSS 7.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.8
- EG Score
- 7.8(medium)
- EPSS
- 38.8%
- KEV
- Not listed
Published
September 21, 2017
Last Modified
May 13, 2026
References (12)
- cve@mitrehttp://www.openwall.com/lists/oss-security/2015/05/13/11
- cve@mitrehttp://www.securityfocus.com/bid/74648
- cve@mitrehttps://bugzilla.redhat.com/show_bug.cgi?id=1147013
- cve@mitrehttps://github.com/rofl0r/proxychains-ng/blob/v4.9/README#L56
- cve@mitrehttps://github.com/rofl0r/proxychains-ng/commit/9ab7dbeb3baff67a51d0c5e71465c453be0890b5#diff-803c5170888b8642f2a97e5e9423d399
- cve@mitrehttps://github.com/rofl0r/proxychains-ng/issues/60
- af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2015/05/13/11
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/74648
- af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1147013
- af854a3a-2127-422b-91ae-364da2661108https://github.com/rofl0r/proxychains-ng/blob/v4.9/README#L56
- af854a3a-2127-422b-91ae-364da2661108https://github.com/rofl0r/proxychains-ng/commit/9ab7dbeb3baff67a51d0c5e71465c453be0890b5#diff-803c5170888b8642f2a97e5e9423d399
- af854a3a-2127-422b-91ae-364da2661108https://github.com/rofl0r/proxychains-ng/issues/60
Frequently asked(5)
What is CVE-2015-3887?
CVE-2015-3887 is a high vulnerability published on September 21, 2017. 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.
When was CVE-2015-3887 disclosed?
CVE-2015-3887 was first published in the National Vulnerability Database on September 21, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-3887 actively exploited?
CVE-2015-3887 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2015-3887?
CVE-2015-3887 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2015-3887?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-3887, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
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