Inefficient regular expression complexity in Action Mailer - CVE-2024-47889

Vulnerability identifier: #VU99670

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2024-47889

CWE-ID: CWE-1333

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when processing untrusted input with a regular expressions in the block_format helper. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Action Mailer
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Manager Proxy
SUSE Linux Enterprise Server 15 SP2 Business Critical Linux
SUSE Linux Enterprise Server 15 SP3 Business Critical Linux
openEuler
ruby2.5-rubygem-actionmailer-5_1
rubygem-actionmailer
rubygem-actionmailer-doc

Install update from vendor's website.

Action Mailer - addressed in versions 6.1.7.9, 7.0.8.5, 7.1.4.1, 7.2.1.1
ruby2.5-rubygem-actionmailer-5_1 - update to 5.1.4-150000.3.3.1
rubygem-actionmailer - update to 6.1.4.1-2
rubygem-actionmailer-doc - update to 6.1.4.1-2

• https://github.com/rails/rails/security/advisories/GHSA-h47h-mwp9-c6q6
• https://github.com/rails/rails/commit/0e5694f4d32544532d2301a9b4084eacb6986e94
• https://github.com/rails/rails/commit/3612e3eb3fbafed4f85e1c6ea4c7b6addbb0fdd3
• https://github.com/rails/rails/commit/985f1923fa62806ff676e41de67c3b4552131ab9
• https://github.com/rails/rails/commit/be898cc996986decfe238341d96b2a6573b8fd2e

• Denial of service in Action Mailer
• SUSE update for rubygem-actionmailer-5_1
• openEuler update for rubygem-actionmailer