CVE-2024-47889
Description
Action Mailer is a framework for designing email service layers. Starting in version 3.0.0 and prior to versions 6.1.7.9, 7.0.8.5, 7.1.4.1, and 7.2.1.1, there is a possible ReDoS vulnerability in the block_format helper in Action Mailer. Carefully crafted text can cause the block_format helper to take an unexpected amount of time, possibly resulting in a DoS vulnerability. All users running an affected release should either upgrade to versions 6.1.7.9, 7.0.8.5, 7.1.4.1, or 7.2.1.1 or apply the relevant patch immediately. As a workaround, users can avoid calling the `block_format` helper or upgrade to Ruby 3.2. Ruby 3.2 has mitigations for this problem, so Rails applications using Ruby 3.2 or newer are unaffected. Rails 8.0.0.beta1 requires Ruby 3.2 or greater so is unaffected.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 2:6.1.7.10+dfsg-1~deb12u1 |
| debian | bullseye | fixed | 2:6.0.3.7+dfsg-2+deb11u3 |
| debian | forky | fixed | 2:7.2.2.1+dfsg-1 |
| debian | sid | fixed | 2:7.2.2.1+dfsg-1 |
| debian | trixie | fixed | 2:7.2.2.1+dfsg-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | actionmailer | !< 3.0.0||<~> 6.1.7.9 | ~> 6.1.7.9 |
| RubyGems | actionmailer | >=3.0.0,<6.1.7.9 | 6.1.7.9 |
| RubyGems | actionmailer | >=7.0.0,<7.0.8.5 | 7.0.8.5 |
| RubyGems | actionmailer | >=7.1.0,<7.1.4.1 | 7.1.4.1 |
| RubyGems | actionmailer | >=7.2.0,<7.2.1.1 | 7.2.1.1 |
References
- https://github.com/rails/rails/security/advisories/GHSA-h47h-mwp9-c6q6
- https://www.suse.com/security/cve/CVE-2024-47889.html
- https://github.com/rails/rails
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionmailer/CVE-2024-47889.yml
- https://security-tracker.debian.org/tracker/CVE-2024-47889
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.