Plattform
ruby
Komponente
nori
Behoben in
2.0.2
CVE-2013-0285 is an object injection vulnerability discovered in the Nori gem for Ruby. This flaw allows remote attackers to execute arbitrary code or trigger a denial of service by exploiting improper handling of string casts within XML parsing. The vulnerability impacts versions of Nori up to and including 2.0.0, and a fix is available in version 2.0.2.
Successful exploitation of CVE-2013-0285 can lead to severe consequences. An attacker can inject malicious objects into the XML parsing process, potentially leading to remote code execution (RCE) on the server hosting the application using the Nori gem. This could allow the attacker to gain complete control of the system, steal sensitive data, or install malware. The denial-of-service impact stems from the potential for excessive memory and CPU consumption caused by nested XML entity references, effectively rendering the application unresponsive. This vulnerability shares similarities with CVE-2013-0156, highlighting the risks associated with improper XML parsing and type conversion.
CVE-2013-0285 was publicly disclosed in 2017. While no active exploitation campaigns have been definitively linked to this specific CVE, the potential for RCE makes it a significant risk. The vulnerability's similarity to CVE-2013-0156 suggests that it could be targeted by attackers familiar with XML injection techniques. No KEV listing is currently available. Public proof-of-concept exploits are available, demonstrating the feasibility of exploitation.
Applications utilizing the Nori gem for XML parsing, particularly those handling untrusted input, are at risk. This includes web applications, APIs, and any Ruby-based system that processes XML data from external sources. Legacy applications that have not been regularly updated are especially vulnerable.
• ruby / server:
grep -r "nori.gem" /var/log/ruby/production.log
bundle list | grep nori• generic web:
curl -I <your_ruby_app_url> | grep XMLdiscovery
disclosure
Exploit-Status
EPSS
1.50% (81% Perzentil)
The primary mitigation for CVE-2013-0285 is to upgrade the Nori gem to version 2.0.2 or later. If upgrading immediately is not feasible due to compatibility issues or breaking changes, consider implementing temporary workarounds. Input validation and sanitization on XML data before passing it to the Nori gem can help prevent malicious entity references from being processed. Web application firewalls (WAFs) configured to detect and block XML injection attempts can also provide a layer of protection. Monitor application logs for unusual XML parsing activity or excessive resource consumption, which could indicate exploitation attempts. After upgrading, confirm the fix by attempting to parse a known malicious XML payload and verifying that it is properly handled without triggering code execution or a denial of service.
Kein offizieller Patch verfügbar. Prüfe auf Workarounds oder überwache auf Updates.
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
CVE-2013-0285 is a high-severity object injection vulnerability affecting the Nori gem for Ruby, allowing attackers to execute code or cause denial of service through XML manipulation.
You are affected if you are using Nori gem versions 2.0.0 or earlier. Upgrade to version 2.0.2 or later to resolve the vulnerability.
Upgrade the Nori gem to version 2.0.2 or later using your Ruby package manager (e.g., gem update nori).
While no confirmed active exploitation campaigns are publicly known, the vulnerability's nature and similarity to other object injection flaws suggest a potential for exploitation.
Refer to the NVD entry for CVE-2013-0285 for related information and links: https://nvd.nist.gov/vuln/detail/CVE-2013-0285
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