ruby: denial of service
| Package(s): | ruby | CVE #(s): | CVE-2012-5371 | ||||||||||||||||||||||||||||
| Created: | November 19, 2012 | Updated: | December 7, 2012 | ||||||||||||||||||||||||||||
| Description: | From the Red Hat bugzilla:
Ruby 1.9.3-p327 was released to correct a hash-flooding DoS vulnerability that only affects 1.9.x and the 2.0.0 preview [1]. As noted in the upstream report: Carefully crafted sequence of strings can cause a denial of service attack on the service that parses the sequence to create a Hash object by using the strings as keys. For instance, this vulnerability affects web application that parses the JSON data sent from untrusted entity. This vulnerability is similar to CVS-2011-4815 for ruby 1.8.7. ruby 1.9 versions were using modified MurmurHash function but it's reported that there is a way to create sequence of strings that collide their hash values each other. This fix changes the Hash function of String object from the MurmurHash to SipHash 2-4. Ruby 1.8.x is not noted as being affected by this flaw. | ||||||||||||||||||||||||||||||
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