CVE-2024-47889

There is a possible ReDoS vulnerability in the block_format helper in Action Mailer. This vulnerability has been assigned the CVE identifier CVE-2024-47889.

Impact

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 or apply the relevant patch immediately.

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.

Releases

The fixed releases are available at the normal locations.

Workarounds

Users can avoid calling the block_format helper or upgrade to Ruby 3.2

Credits

Thanks to yuki_osaki for the report!

Email on Rails. Compose, deliver, and test emails using the familiar controller/view pattern. First-class support for multipart email and attachments.

Security Fix(es):

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.(CVE-2024-47889)

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.

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.

These are all security issues fixed in the ruby3.3-rubygem-actionmailer-7.0-7.0.8.6-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the ruby3.3-rubygem-rails-7.0-7.0.8.6-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the ruby3.4-rubygem-actionmailer-7.0-7.0.8.6-1.3 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the ruby3.4-rubygem-rails-7.0-7.0.8.6-1.3 package on the GA media of openSUSE Tumbleweed.

This update for rubygem-actionmailer-5_1 fixes the following issues:

• CVE-2024-47889: Fixed Possible ReDoS vulnerability in block_format in Action Mailer (bsc#1231723).

It was discovered that Rails did not correctly handle parsing block formats in email service layers. An attacker could possibly use this issue to cause a denial of service. (CVE-2024-47889)

It was discovered that Rails did not correctly handle parsing block quotes in rich text content. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2024-47888)

It was discovered that Rails did not correctly handle parsing HTTP token authentication headers. An attacker could possibly use this issue to cause a denial of service. (CVE-2024-47887)

It was discovered that Rails did not correctly handle parsing query parameters in web requests. An attacker could possibly use this issue to cause a denial of service. (CVE-2024-41128)