Vulnerability · Published Oct 16, 2024 · Assigned by GitHub_M
CVE-2024-47889Action Mailer has possible ReDoS vulnerability in block_format
Medium 6.6
In plain English
A medium-severity regular-expression denial of service in rails from rails. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rails | 2:6.1.7.10+dfsg-1~deb12u1 | DEBIAN-CVE-2024-47889 |
| Debian:12 | rails | 2:6.1.7.10+dfsg-1~deb12u1 | DSA-5881-1 |
| Debian:13 | rails | 2:7.2.2.1+dfsg-1 | DEBIAN-CVE-2024-47889 |
| Debian:14 | rails | 2:7.2.2.1+dfsg-1 | DEBIAN-CVE-2024-47889 |
| RubyGems | actionmailer | 6.1.7.9 | GHSA-h47h-mwp9-c6q6 |
| RubyGems | actionmailer | 7.0.8.5 | GHSA-h47h-mwp9-c6q6 |
| RubyGems | actionmailer | 7.1.4.1 | GHSA-h47h-mwp9-c6q6 |
| RubyGems | actionmailer | 7.2.1.1 | GHSA-h47h-mwp9-c6q6 |
| Ubuntu:24.04:LTS | rails | no fix listed | UBUNTU-CVE-2024-47889 |
| Ubuntu:25.10 | rails | no fix listed | UBUNTU-CVE-2024-47889 |
| Ubuntu:26.04:LTS | rails | no fix listed | UBUNTU-CVE-2024-47889 |
| Ubuntu:26.10 | rails | no fix listed | UBUNTU-CVE-2024-47889 |
Affected products (as reported)
Weakness: CWE-1333 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
References
- https://github.com/rails/rails/security/advisories/GHSA-h47h-mwp9-c6q6 x_refsource_CONFIRM
- https://github.com/rails/rails/commit/0e5694f4d32544532d2301a9b4084eacb6986e94 x_refsource_MISC
- https://github.com/rails/rails/commit/3612e3eb3fbafed4f85e1c6ea4c7b6addbb0fdd3 x_refsource_MISC
- https://github.com/rails/rails/commit/985f1923fa62806ff676e41de67c3b4552131ab9 x_refsource_MISC
- https://github.com/rails/rails/commit/be898cc996986decfe238341d96b2a6573b8fd2e x_refsource_MISC