Resource exhaustion in Rack - CVE-2025-61771

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Main Vulnerability Database Vulnerabilities #VU116666

Resource exhaustion in Rack - CVE-2025-61771

Published: October 7, 2025


Vulnerability identifier: #VU116666
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-2025-61771
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to application does not properly control consumption of internal resources in Rack::Multipart::Parser when handling file parts. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.


Affected software

Rack
Debian Linux
Anolis OS
Ubuntu
Fedora
IBM Aspera Console
EasyApache
pcs (Red Hat package)
pcs-snmp
pcs
ruby-rack (Ubuntu package)
ruby-rack (Debian package)
rubygem-rack
IBM Cloud Pak for Multicloud Management

How to mitigate CVE-2025-61771

Install updates from vendor's website.

Rack - addressed in versions 2.2.19, 3.1.17, 3.2.2
IBM Aspera Console - update to 3.4.8
EasyApache - update to 4 25-31
pcs (Red Hat package) - addressed in versions 0.9.169-3.el7_9.5, 0.10.12-6.el8_6.10, 0.10.15-4.el8_8.9, 0.10.18-2.el8_10.7, 0.11.1-10.el9_0.9, 0.11.10-1.el9_7.1, 0.12.0-3.el10_0.3, 0.12.1-1.el10_1.1
pcs-snmp - update to 0.10.18-2.0.1
pcs - update to 0.10.18-2.0.1
ruby-rack (Ubuntu package) - addressed in versions 1.6.4-3ubuntu0.2+esm9, 1.6.4-4ubuntu0.2+esm9, 2.0.7-2ubuntu0.1+esm8, 2.1.4-5ubuntu1.2, 2.2.7-1ubuntu0.5, 3.1.16-0.1ubuntu0.1
ruby-rack (Debian package) - addressed in versions 2.2.20-0+deb12u1, 3.1.18-1~deb13u1
rubygem-rack - addressed in versions 2.2.21-1.fc41, 2.2.21-9.fc42, 3.1.19-1.fc43
IBM Cloud Pak for Multicloud Management - update to 2.3 Fix Pack 12

External References

Related Security Bulletins