CVE-2018-1000073

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Directory Traversal vulnerability in install_location function of package.rb that can result in path traversal when writing to a symlinked basedir outside of the root. This vulnerability appears to have been fixed in 2.7.6.

Published: 2018-03-13 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-1000073 is rated High Risk (65.9/100): CVSS High severity, with high exploitation likelihood (EPSS 5.08%, 91th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +4.02% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-1000073

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.06% 5.08% +4.02%
2 2026-01-09 0.98% 1.06% +0.08%
3 2025-11-21 — 0.98% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-1000073

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-1000073

GitHub Security Advisory for CVE-2018-1000073

GHSA-gx69-6cp4-hxrj · Severity: high · Ecosystem: rubygems — RubyGems Link Following vulnerability

OS Trackers for CVE-2018-1000073

vendor priority summary link
debian not yet assigned CVE-2018-1000073 not yet assigned priority: Debian including 2 source packages (jruby, rubygems), 9 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 9. https://security-tracker.debian.org/tracker/CVE-2018-1000073
redhat medium — https://access.redhat.com/security/cve/CVE-2018-1000073
suse medium CVE-2018-1000073 severity moderate: SUSE including 301 source package names (2.17-17.3:libruby2_5-2_5-2.5.5-4.3.1, 2.17-17.3:ruby2.5-2.5.5-4.3.1, …), 1023 product×package rows across 255 product lines (Container bci/ruby, Container suse/rmt-server, … (255 product lines)): Fixed 842, Known Affected 157, Known Not Affected 24. https://www.suse.com/security/cve/CVE-2018-1000073/
ubuntu low CVE-2018-1000073 low priority: Ubuntu including 6 source packages (jruby, ruby1.9.1, ruby2.0, ruby2.1, ruby2.3, ruby2.5), 118 status rows across 20 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 88, not-affected 14, needs-triage 9, released 4, ignored 3. https://ubuntu.com/security/CVE-2018-1000073

Affected software / configurations for CVE-2018-1000073

Vendor Product Version Raw CPE
rubygems rubygems <= 2.2.9 cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems <= 2.3.6 cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems <= 2.4.3 cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems <= 2.5.0 cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*

References for CVE-2018-1000073

cvelogic Threat Intelligence