Platform
ruby
Component
rails
Fixed in
1.1.6
CVE-2006-4112 describes a denial-of-service (DoS) vulnerability within the dependency resolution mechanism of Ruby on Rails. This flaw allows remote attackers to potentially execute arbitrary Ruby code through a malformed URL, resulting in application hangs or data loss. The vulnerability impacts Ruby on Rails versions 1.1.0 through 1.1.5, and a fix is available in version 1.1.6.
The primary impact of CVE-2006-4112 is a denial-of-service condition. An attacker can craft a malicious URL that, when processed by the Ruby on Rails application, triggers the execution of arbitrary Ruby code. This can lead to the application becoming unresponsive, effectively denying service to legitimate users. Beyond the immediate DoS, the description also mentions a potential for "data loss," suggesting that the arbitrary code execution could be leveraged to manipulate or delete data stored within the application. While the description doesn't explicitly detail lateral movement capabilities, the ability to execute arbitrary code opens the door to further exploitation and potential compromise of the underlying system.
CVE-2006-4112 was published in 2017, significantly later than the vulnerability's initial discovery. It is not currently listed on the CISA KEV catalog. Public proof-of-concept exploits for this vulnerability are not widely available, suggesting a relatively low probability of active exploitation at this time. The delayed publication suggests that the vulnerability may have been discovered earlier but remained unreported for an extended period.
Exploit Status
EPSS
7.37% (92% percentile)
The recommended mitigation for CVE-2006-4112 is to immediately upgrade to Ruby on Rails version 1.1.6 or later. If upgrading is not immediately feasible due to compatibility issues or breaking changes, consider implementing a temporary workaround by carefully scrutinizing incoming URLs and rejecting those that appear malformed or suspicious. Web application firewalls (WAFs) can be configured to filter out requests containing potentially malicious URL patterns. While no specific Sigma or YARA rules are readily available for this particular vulnerability, monitoring for unusual Ruby code execution patterns within the application logs is advisable.
No official patch available. Check for workarounds or monitor for updates.
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CVE-2006-4112 is a denial-of-service vulnerability in Ruby on Rails versions 1.1.0 through 1.1.5, allowing attackers to potentially execute arbitrary Ruby code via a crafted URL.
If you are running Ruby on Rails versions 1.1.0 through 1.1.5, you are potentially affected by this vulnerability. Upgrade to version 1.1.6 or later.
The recommended fix is to upgrade to Ruby on Rails version 1.1.6 or later. If upgrading is not possible, implement URL filtering and WAF rules as temporary workarounds.
While public exploits are not widely available, the potential for arbitrary code execution warrants caution. Monitor your systems for unusual activity.
The official advisory can be found on the Ruby on Rails security page, though it may be archived due to the age of the vulnerability.
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