CVE-2018-1000077

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 Improper Input Validation vulnerability in ruby gems specification homepage attribute that can result in a malicious gem could set an invalid homepage URL. 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-2018-1000077 is rated Moderate Risk (48.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.11%). 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-2018-1000077

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 2026-01-09 1.03% 1.11% +0.08%
2 2025-11-21 1.93% 1.03% -0.91%
3 2025-11-18 — 1.93% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-1000077

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/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:L)
Exploitation conditions are straightforward and predictable.
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.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-1000077

GitHub Security Advisory for CVE-2018-1000077

GHSA-gv86-43rv-79m2 · Severity: medium · Ecosystem: rubygems — RubyGems Improper Input Validation vulnerability

OS Trackers for CVE-2018-1000077

vendor priority summary link
debian not yet assigned CVE-2018-1000077 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-2018-1000077
redhat medium — https://access.redhat.com/security/cve/CVE-2018-1000077
suse medium CVE-2018-1000077 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, …), 1035 product×package rows across 258 product lines (Container bci/ruby, Container suse/rmt-server, … (258 product lines)): Fixed 842, Known Affected 157, Known Not Affected 36. https://www.suse.com/security/cve/CVE-2018-1000077/
ubuntu medium CVE-2018-1000077 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 87, not-affected 12, released 9, needs-triage 8, ignored 2. https://ubuntu.com/security/CVE-2018-1000077

Affected software / configurations for CVE-2018-1000077

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:*:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*

References for CVE-2018-1000077

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/feadefc2d351dcb95d6492f5ad17ebca546eb964 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00000.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00001.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
https://lists.debian.org/debian-lts-announce/2019/05/msg00028.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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