CVE-2025-0306
Ruby: openssl: ruby marvin attack
A vulnerability was found in Ruby. The Ruby interpreter is vulnerable to the Marvin Attack. This attack allows the attacker to decrypt previously encrypted messages or forge signatures by exchanging a large number of messages with the vulnerable service.
Fixes and workarounds
Workaround
See the following possible mitigations for this flaw: * Do not use the methods with PKCS#1v1.5 padding in network contexts. Make sure that any calls that happen, will perform OAEP decryption only. Do not support PKCS#1v1.5 encryption padding at all. * Use Ruby with a version of OpenSSL that has the implicit rejection mechanism implemented.(https://github.com/openssl/openssl/pull/13817, https://github.com/openssl/openssl/commit/7fc67e0a33102aa47bbaa56533eeecb98c0450f7 included in 3.2.0, backported to RHEL-8)
Source: CNA: redhatAffected products and versions
| Product | Versions | Authority |
|---|---|---|
Ruby
https://git.ruby-lang.org/ruby.git |
≥ 0; < * (affected, semver)
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 10 Red Hat ruby
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 6 Red Hat ruby
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unknown |
CNA: redhat |
| Red Hat Enterprise Linux 7 Red Hat ruby
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unknown |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat ruby:2.5/ruby
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unknown |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat ruby:3.1/ruby
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unknown |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat ruby:3.3/ruby
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat ruby
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat ruby:3.1/ruby
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat ruby:3.3/ruby
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat Storage 3 Red Hat ruby
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unknown |
CNA: redhat |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.4 high |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | CNA: redhat |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://access.redhat.com/security/cve/CVE-2025-0306CNA: redhat · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2336100CNA: redhat · issue-tracking, x_refsource_REDHAT
- https://security.netapp.com/advisory/ntap-20250221-0009/ADP: CVE
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