Plattform
ruby
Komponente
actionpack
Behoben in
4.2.5.1
CVE-2015-7581 is a denial-of-service (DoS) vulnerability discovered in Action Pack, a core component of the Ruby on Rails web application framework. This vulnerability allows remote attackers to cause excessive caching and memory consumption, potentially leading to application instability and service disruption. It impacts Ruby on Rails versions 4.x prior to 4.2.5.1 and versions of 5.x before 5.0.0.beta1.1. A fix has been released in Rails 4.2.5.1.
An attacker can exploit CVE-2015-7581 by crafting requests that leverage wildcard controller routes within a Rails application. The vulnerability stems from inefficient caching and memory management when processing these requests. Specifically, the routing mechanism can be manipulated to trigger excessive caching and memory allocation, ultimately overwhelming the server and causing a denial of service. This can manifest as slow response times, application crashes, or complete unavailability of the web application. The impact is particularly severe for applications heavily reliant on wildcard routes or those handling high volumes of traffic.
CVE-2015-7581 was publicly disclosed in 2017. While no active exploitation campaigns have been definitively linked to this specific CVE, the potential for DoS attacks remains a concern. The vulnerability's impact is amplified in environments with limited resources or high traffic volumes. No KEV listing is available at the time of this writing.
Applications using Ruby on Rails versions 4.x before 4.2.5.1 and 5.x before 5.0.0.beta1.1 are at risk. This includes web applications deployed on shared hosting environments, legacy applications that have not been regularly updated, and applications utilizing custom routing configurations that might inadvertently expose wildcard routes.
• ruby: Monitor Ruby processes for unusually high memory consumption using tools like ps or top.
ps aux | grep ruby | sort -k 4 -nr | head -10• linux / server: Examine application logs for unusual routing patterns or excessive route generation. Use journalctl to filter for relevant errors or warnings.
journalctl -u your_rails_app -f | grep "route cache" • generic web: Monitor web server access logs for requests containing unusual or excessively long URL parameters that might be triggering the wildcard route vulnerability.
discovery
disclosure
Exploit-Status
EPSS
7.11% (91% Perzentil)
CVSS-Vektor
The primary mitigation for CVE-2015-7581 is to upgrade to Ruby on Rails version 4.2.5.1 or later. If upgrading immediately is not feasible, consider implementing rate limiting on requests to routes utilizing wildcard controllers. Web application firewalls (WAFs) can be configured to detect and block malicious requests targeting these routes. Carefully review application code to identify and eliminate unnecessary wildcard route usage. After upgrading, confirm the fix by sending requests that previously triggered the DoS condition and verifying that resource consumption remains within acceptable limits.
Kein offizieller Patch verfügbar. Prüfe auf Workarounds oder überwache auf Updates.
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
CVE-2015-7581 is a denial-of-service vulnerability in Ruby on Rails Action Pack, allowing attackers to cause memory exhaustion through wildcard routes.
You are affected if you are using Ruby on Rails versions 4.x before 4.2.5.1 or 5.x before 5.0.0.beta1.1.
Upgrade to Ruby on Rails 4.2.5.1 or later for 4.x, or 5.0.0.beta1.1 or later for 5.x. Consider temporary workarounds if immediate upgrade is not possible.
While no confirmed active campaigns are known, DoS vulnerabilities are frequently targeted, and public exploits exist.
Refer to the official Ruby on Rails security advisories: https://github.com/rails/rails/security/advisories
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