CVE-2012-2125

RubyGems HTTPS to HTTP redirect

5.8 MediumFix available

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.

Exploit likelihood

2.47%Up 1.1 points since Feb 4, 2022

What each source reports

NVD Score used 5.8

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.

Record: CVE-2012-2125
CVSS 2.0: 5.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:N
Updated: 2026-11-02

CVE List No score

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.

Record: CVE-2012-2125
Updated: 2026-11-02

EUVDEUVD-2022-1878 No score

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.

Record: EUVD-2022-1878
Updated: 2026-11-03

GitHub AdvisoriesGHSA-228f-g3h7-3fj3 No score

RubyGems HTTPS to HTTP redirect

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.

Record: GHSA-228f-g3h7-3fj3
Updated: 2026-11-02

OSV No score

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.

Record: CVE-2012-2125
Updated: 2026-11-02

OSVDEBIAN-CVE-2012-2125 No score

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.

Record: DEBIAN-CVE-2012-2125
Updated: 2026-11-02

OSVGHSA-228f-g3h7-3fj3 No score

RubyGems HTTPS to HTTP redirect

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.

Record: GHSA-228f-g3h7-3fj3
Updated: 2026-11-02

OSVUBUNTU-CVE-2012-2125 No score

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.

Record: UBUNTU-CVE-2012-2125
Updated: 2026-11-02

Affected products

rubygems

Affected packages

Affected packages
Package	Affected	Fixed
`rubygems-update` RubyGems	before 1.8.23	1.8.23
`rubygems` Debian:12	before 1.8.24-1	1.8.24-1
`rubygems` Debian:13	before 1.8.24-1	1.8.24-1
`rubygems` Debian:14	before 1.8.24-1	1.8.24-1
`rubygems-update` RubyGems	before 1.8.23, plus listed versions 0.8.100.8.110.8.30.8.40.8.5 Show 45 moreShow less 0.8.60.8.80.9.00.9.10.9.20.9.30.9.40.9.51.0.01.0.11.1.01.1.11.2.01.3.01.3.11.3.21.3.31.3.41.3.51.3.61.3.71.4.01.4.11.4.21.5.01.5.21.5.31.6.01.6.11.6.21.7.01.7.11.7.21.8.01.8.11.8.101.8.111.8.121.8.131.8.141.8.151.8.161.8.171.8.181.8.19	1.8.23
`rubygems` Red Hat:openshift:1.2::el6	before 0:1.8.24-4.el6op	0:1.8.24-4.el6op
`rubygems` Red Hat:enterprise_linux:6::client	before 0:1.3.7-4.el6_4	0:1.3.7-4.el6_4
`rubygems` Red Hat:enterprise_linux:6::computenode	before 0:1.3.7-4.el6_4	0:1.3.7-4.el6_4
`rubygems` Red Hat:enterprise_linux:6::server	before 0:1.3.7-4.el6_4	0:1.3.7-4.el6_4
`rubygems` Red Hat:enterprise_linux:6::workstation	before 0:1.3.7-4.el6_4	0:1.3.7-4.el6_4

Show 4 moreShow less

Affected packages
Package	Affected	Fixed
`rubygems` Red Hat:enterprise_mrg:2:computenode:el6	before 0:1.8.23.2-1.el6	0:1.8.23.2-1.el6
`cumin` Red Hat:enterprise_mrg:2:server:el6	before 0:0.1.5787-4.el6	0:0.1.5787-4.el6
`rubygems` Red Hat:enterprise_mrg:2:server:el6	before 0:1.8.23.2-1.el6	0:1.8.23.2-1.el6
`jruby` Ubuntu:Pro:14.04:LTS	All versions, plus listed versions 1.5.6-5ubuntu11.5.6-61.5.6-71.5.6-9+deb8u2build0.14.04.1~esm2	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2012-2125 is a medium vulnerability (CVSS 5.8) in Rubygems, published April 20, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.47%, the 84th percentile. Fixed in rubygems-update 1.8.23.

References

Show 45 moreShow less

This page doesn't list everything

Left out here: 11 versions. The JSON record has them.