6.6

CVE-2024-47889: Action Mailer has possible ReDoS vulnerability in block_format

Deferred
AliasesSUSE-SU-2024:3878-1UBUNTU-CVE-2024-47889DEBIAN-CVE-2024-47889
Published 16-10-2024Last modified 17-10-2024

Vulnerability summary

CVE-2024-47889 is a medium (CVSS 6.6) vulnerability in rails. EPSS estimates a 0.94% chance of exploitation in the next 30 days, higher than 60.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.6, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.6/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.94%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 3
DLA-4383-1DSA-5881-1OPENSUSE-SU-2024:14479-1OPENSUSE-SU-2025:15124-1USN-7290-1

Timeline

  1. 16-10-2024
    PublishedVulnerability first disclosed.
  2. 17-10-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.94%

Chance of exploitation in the next 30 days

Percentile

61%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.94% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Suse4 products
  • rubygem-actionmailer-5_1&distro=SUSE Linux Enterprise High Availability Extension 15 SP2< 5.1.4-150000.3.3.1
  • rubygem-actionmailer-5_1&distro=SUSE Linux Enterprise High Availability Extension 15 SP3< 5.1.4-150000.3.3.1
  • rubygem-actionmailer-5_1&distro=SUSE Linux Enterprise High Availability Extension 15 SP4< 5.1.4-150000.3.3.1
  • rubygem-actionmailer-5_1&distro=SUSE Linux Enterprise High Availability Extension 15 SP5< 5.1.4-150000.3.3.1
Debian1 product
  • rails< 2:6.1.7.10+dfsg-1~deb12u1 | < 2:7.2.2.1+dfsg-1
Opensuse1 product
  • rubygem-actionmailer-7.0&distro=openSUSE Tumbleweed< 7.0.8.6-1.1 | < 7.0.8.6-1.3
Rails1 product
  • rails≥ 3.0.0, < 6.1.7.9 | ≥ 7.0.0, < 7.0.8.5 | ≥ 7.1.0, < 7.1.4.1 | ≥ 7.2.0, < 7.2.1.1
RubyGems1 product
  • actionmailer≥ 3.0.0, < 6.1.7.9 | ≥ 7.0.0, < 7.0.8.5 | ≥ 7.1.0, < 7.1.4.1 | ≥ 7.2.0, < 7.2.1.1
Ubuntu1 product
  • rails< 2:4.2.6-1ubuntu0.1~esm1 | < 2:4.2.10-0ubuntu4+esm1 | < 2:5.2.3+dfsg-3ubuntu0.1~esm1 | < 2:6.1.4.1+dfsg-8ubuntu2+esm1 | All versions (No fix recorded)

6 vendors · 9 products

References

16 links
Show all 16 references