CVE-2018-1000079

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 gem installation that can result in the gem could write to arbitrary filesystem locations during installation. This attack appear to be exploitable via the victim must install a malicious gem. This vulnerability appears to have been fixed in 2.7.6.

Published: 2018-03-13 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-1000079 is rated Moderate Risk (54.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.88%). EPSS rose +2.58% over the last day, indicating growing attacker interest. Review affected assets and schedule 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-2018-1000079

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 0.29% 2.88% +2.58%
2 2025-11-21 1.23% 0.29% -0.93%
3 2025-11-18 — 1.23% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-1000079

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.0 MEDIUM
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 1.8 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2018-1000079

GitHub Security Advisory for CVE-2018-1000079

GHSA-8qxg-mff5-j3wc · Severity: medium · Ecosystem: rubygems — RubyGems Path Traversal vulnerability

OS Trackers for CVE-2018-1000079

vendor priority summary link
debian not yet assigned CVE-2018-1000079 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-2018-1000079
redhat medium — https://access.redhat.com/security/cve/CVE-2018-1000079
suse medium CVE-2018-1000079 severity moderate: SUSE including 307 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, …), 1029 product×package rows across 259 product lines (Container bci/ruby, Container suse/rmt-server, … (259 product lines)): Fixed 842, Known Affected 157, Known Not Affected 30. https://www.suse.com/security/cve/CVE-2018-1000079/
ubuntu medium CVE-2018-1000079 medium 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 12, needs-triage 9, released 7, ignored 2. https://ubuntu.com/security/CVE-2018-1000079

Affected software / configurations for CVE-2018-1000079

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-2018-1000079

URL Tags
http://blog.rubygems.org/2018/02/15/2.7.6-released.html Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
https://access.redhat.com/errata/RHSA-2018:3729
https://access.redhat.com/errata/RHSA-2018:3730
https://access.redhat.com/errata/RHSA-2018:3731
https://access.redhat.com/errata/RHSA-2019:2028
https://access.redhat.com/errata/RHSA-2020:0542
https://access.redhat.com/errata/RHSA-2020:0591
https://access.redhat.com/errata/RHSA-2020:0663
https://github.com/rubygems/rubygems/commit/666ef793cad42eed96f7aee1cdf77865db921099 Patch Third Party Advisory
https://github.com/rubygems/rubygems/commit/f83f911e19e27cbac1ccce7471d96642241dd759 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
https://usn.ubuntu.com/3621-1/
https://www.debian.org/security/2018/dsa-4219
https://www.debian.org/security/2018/dsa-4259
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