CVE catalog
CVE-2015-4020
rubygems: CVE-2015-4020
- Severity
- Low
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.46% · Oct 25, 2026
RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.4.x before 2.4.8 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record with a domain that is suffixed with the original domain name, aka a "DNS hijack attack." NOTE: this vulnerability exists because to an incomplete fix for CVE-2015-3900.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | jruby | sid | 10.1.2.0+ds-1 | not affected |
| Debian | jruby | forky | 10.1.2.0+ds-1 | not affected |
| Debian | jruby | trixie | 9.4.8.0+ds-3 | not affected |
| Debian | jruby | bookworm | 9.3.9.0+ds-8 | not affected |
| Debian | rubygems | sid | 4.0.22-1 | not affected |
| Debian | rubygems | forky | 4.0.22-1 | not affected |
| Debian | rubygems | trixie | 3.6.7-2 | not affected |
| Debian | rubygems | bookworm | 3.3.15-2+deb12u1 | not affected |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | jruby | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | jruby | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | jruby | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | jruby | source | bookworm | Not affected | unimportant | Not reported | Not reported |
| Debian | rubygems | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | rubygems | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | rubygems | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | rubygems | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [bundler]Not affected
Source package: [rubygems]
Details (2)
2.3.15-2+deb12u1· all · bookwormNot affected
dsa · rubygems · debian · bookworm
2.3.15-2+deb12u1· all · bookwormNot affected
dsa · rubygems · debian · bookworm
- [jruby]Not affected
Details (2)
9.3.9.0+ds-8· all · bookwormNot affected
dsa · jruby · debian · bookworm
9.3.9.0+ds-8· all · bookwormNot affected
dsa · jruby · debian · bookworm
- [ruby-bundler]Not affected
Source package: [rubygems]
Details (2)
2.3.15-2+deb12u1· all · bookwormNot affected
dsa · rubygems · debian · bookworm
2.3.15-2+deb12u1· all · bookwormNot affected
dsa · rubygems · debian · bookworm
- [ruby-rubygems]Not affected
Source package: [rubygems]
Details (2)
3.3.15-2+deb12u1· all · bookwormNot affected
dsa · rubygems · debian · bookworm
3.3.15-2+deb12u1· all · bookwormNot affected
dsa · rubygems · debian · bookworm
Observed: