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CVE-2015-3887

20
FAUCET Score

CVE-2015-3887 is an untrusted search path vulnerability affecting ProxyChains-NG versions prior to 4.9. This flaw allows a local attacker to achieve privilege escalation by placing a malicious libproxychains4.so library in the current working directory, which is then loaded via the LD_PRELOAD path. With a CVSS v3 score of 7.8 (High), the vulnerability has low attack complexity and can lead to high impacts on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.8.1CPE matchmatch criteria
cpe:2.3:a:proxychains-ng_project:proxychains-ng:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.49%
Probability of exploitation in next 30 days
EPSS Percentile
39.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0049 is in the 79th percentile among its peer group of 16,994 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
github.com / rofl0r/proxychains-ng/blob/v4.9/README
Issue TrackingRelease Notes
github.com / rofl0r/proxychains-ng/commit/9ab7dbeb3baff67a51d0c5e71465c453be0890b5
Issue TrackingPatchThird Party Advisory
github.com / rofl0r/proxychains-ng/issues/60
Issue TrackingPatchThird Party Advisory
openwall.com / lists/oss-security/2015/05/13/11
Issue TrackingMailing ListPatchThird Party Advisory
securityfocus.com / bid/74648
Third Party AdvisoryVDB Entry