CVE-2012-2125· NVD / CVE Program· CNA redhat

RubyGems before 1.8.23 can redirect HTTPS connections to HTTP, which makes it easier for remote attackers to observe or modify a gem during

RubyGems before 1.8.23 can redirect HTTPS connections to HTTP, which makes it easier for remote attackers to observe or modify a gem during installation via a man-in-the-middle attack.

MediumCVSS 5.8 · v2.0—No exploit Fix available

Pre-auth

Published: Oct 1, 2013
Updated: Jun 16, 2026
EPSS: 2.5% · 84th percentile
CWE: —

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Action score

Monitor

Low priority for now.

CVSS: 23 / 40 · 5.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 2.5%

Affected systems

Vendor	Product	CPE
rubygems	rubygems	cpe:2.3:a:rubygems:rubygems
redhat	openshift	cpe:2.3:a:redhat:openshift
canonical	ubuntu linux	cpe:2.3:o:canonical:ubuntu_linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

rubygems rubygemsup to 1.8.22 inclusive
rubygems rubygems1.8.0
rubygems rubygems1.8.1
rubygems rubygems1.8.10
rubygems rubygems1.8.11
rubygems rubygems1.8.12
rubygems rubygems1.8.13
rubygems rubygems1.8.14
rubygems rubygems1.8.15
rubygems rubygems1.8.16
rubygems rubygems1.8.17
rubygems rubygems1.8.18
rubygems rubygems1.8.19
rubygems rubygems1.8.2
rubygems rubygems1.8.20
rubygems rubygems1.8.21
rubygems rubygems1.8.3
rubygems rubygems1.8.4
rubygems rubygems1.8.5
rubygems rubygems1.8.6

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	rubygems	before 1.8.24-1	1.8.24-1
Red Hat:enterprise_linux:6::client	rubygems	before 0:1.3.7-4.el6_4	0:1.3.7-4.el6_4
Red Hat:enterprise_mrg:2:computenode:el6	rubygems	before 0:1.8.23.2-1.el6	0:1.8.23.2-1.el6
Red Hat:enterprise_mrg:2:server:el6	cumin	before 0:0.1.5787-4.el6	0:0.1.5787-4.el6
Red Hat:openshift:1.2::el6	rubygems	before 0:1.8.24-4.el6op	0:1.8.24-4.el6op
RubyGems	rubygems-update	before 1.8.23	1.8.23

Same product

rubygems: all records

Other highest-scoring records for the same primary product.

CVE-2017-0903RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability.
44Plan
CVE-2017-0899RubyGems version 2.6.12 and earlier is vulnerable to maliciously crafted gem specifications that include terminal escape characters.
42Plan
CVE-2018-1000076RubyGems 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
40Plan
CVE-2017-0901RubyGems version 2.6.12 and earlier fails to validate specification names, allowing a maliciously crafted gem to potentially overwrite any f
39Monitor
CVE-2019-8324An issue was discovered in RubyGems 2.6 and later through 3.0.2.
36Monitor
CVE-2022-36073RubyGems allows creation of users with arbitrary unverified emails
35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
debian:rubygems	1.8.24-1 · Debian:12	Package registry (OSV)
red hat:cumin	0:0.1.5787-4.el6 · Red Hat:enterprise_mrg:2:server:el6	Package registry (OSV)
red hat:rubygems	0:1.8.24-4.el6op · Red Hat:openshift:1.2::el6	Package registry (OSV)
RubyGems:rubygems-update	1.8.23	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

If successful

Confidentiality: P · data can be read
Integrity: P · data or configuration can be modified
Availability: none

Attack complexity: M
Confidentiality impact: P
Integrity impact: P
Availability impact: None

Weakness class (CWE)

—

CVSS vector

AV:N/AC:M/Au:N/C:P/I:P/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records