CVE-2017-0902

Exp

RubyGems version 2.6.12 and earlier is vulnerable to a DNS hijacking vulnerability that allows a MITM attacker to force the RubyGems client to download and install gems from a server that the attacker controls.

Published: 2017-08-31 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-0902 is rated High Exploit Risk (78.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 5.00%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2017-0902

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-0902

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 2026-05-31 5.13% 5.00% -0.13%
2 2026-05-22 5.21% 5.13% -0.08%
3 2026-03-04 — 5.21% —

Full EPSS history (50 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-0902

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.0 HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H 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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P 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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2017-0902

GitHub Security Advisory for CVE-2017-0902

GHSA-73w7-6w9g-gc8w · Severity: high · Ecosystem: rubygems — RubyGems has Origin Validation Error vulnerability

OS Trackers for CVE-2017-0902

vendor priority summary link
alpine — CVE-2017-0902: 1 source package rows (ruby); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. https://security.alpinelinux.org/vuln/CVE-2017-0902
debian not yet assigned CVE-2017-0902 not yet assigned priority: Debian including 1 source packages (rubygems), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-0902
gentoo normal CVE-2017-0902: 1 GLSA(s) (201710-01), 1 atom(s) (dev-ruby/rubygems); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-0902
redhat medium — https://access.redhat.com/security/cve/CVE-2017-0902
suse medium CVE-2017-0902 severity moderate: SUSE including 22 source package names (libruby2_1-2_1-2.1.9-19.3.2, ruby, …), 162 product×package rows across 56 product lines (HPE Helion OpenStack 8, Image SLES12-SP5-Azure-BYOS, … (56 product lines)): Fixed 140, Known Not Affected 22. https://www.suse.com/security/cve/CVE-2017-0902/
ubuntu medium CVE-2017-0902 medium priority: Ubuntu including 4 source packages (jruby, ruby1.9.1, ruby2.0, ruby2.3), 82 status rows across 21 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial, zesty): DNE 56, ignored 13, needs-triage 7, needed 3, released 3. https://ubuntu.com/security/CVE-2017-0902

Affected software / configurations for CVE-2017-0902

Vendor Product Version Raw CPE
rubygems rubygems <= 2.6.12 cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 17.10 cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.4 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
redhat enterprise_linux_server_eus 7.4 cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*
redhat enterprise_linux_server_eus 7.5 cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*
redhat enterprise_linux_server_eus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
redhat enterprise_linux_server_tus 7.4 cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:*
redhat enterprise_linux_server_tus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*

References for CVE-2017-0902

URL Tags
http://blog.rubygems.org/2017/08/27/2.6.13-released.html Patch Vendor Advisory
http://www.securityfocus.com/bid/100586 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1039249 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:3485 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0378 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0583 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0585 Third Party Advisory
https://github.com/rubygems/rubygems/commit/8d91516fb7037ecfb27622f605dc40245e0f8d32 Exploit Patch Third Party Advisory
https://hackerone.com/reports/218088 Exploit Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/201710-01 Third Party Advisory
https://usn.ubuntu.com/3553-1/ Third Party Advisory
https://usn.ubuntu.com/3685-1/ Third Party Advisory
https://www.debian.org/security/2017/dsa-3966 Third Party Advisory
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