Gentoo Linux Security Advisory 201412-27 - Multiple vulnerabilities have been found in Ruby, allowing context-dependent attackers to cause a Denial of Service condition. Versions less than 2.0.0_p598 are affected.
54e66264d3d6d38c3086840b65a1d59298b94700ea2d898a1673e706acdba6e8Apple Security Advisory 2012-05-09-1 - OS X Lion v10.7.4 and Security Update 2012-002 is now available and addresses multiple security issues. An issue existed in the handling of network account logins. The login process recorded sensitive information in the system log, where other users of the system could read it. A temporary file race condition issue existed in blued's initialization routine. There are known attacks on the confidentiality of SSL 3.0 and TLS 1.0 when a cipher suite uses a block cipher in CBC mode. curl disabled the 'empty fragment' countermeasure which prevented these attacks. This issue is addressed by enabling empty fragments. A data injection issue existed in curl's handling of URLs. This issue is addressed through improved validation of URLs. This issue does not affect systems prior to OS X Lion. Various other vulnerabilities have been addressed.
8a1ec648cdab00dde0f7ff37efd462d6ad93a16f2b5d89ca92fb566b939516e3Mandriva Linux Security Advisory 2012-024 - Ruby before 1.8.7-p357 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service via crafted input to an application that maintains a hash table. The updated packages have been patched to correct this issue.
44b5393632217703390da470f7fefc75b8bdaafb0b6e2a9d36de950d30ad3bcdUbuntu Security Notice 1377-1 - Drew Yao discovered that the WEBrick HTTP server was vulnerable to cross-site scripting attacks when displaying error pages. A remote attacker could use this flaw to run arbitrary web script. Drew Yao discovered that Ruby's BigDecimal module did not properly allocate memory on 64-bit platforms. An attacker could use this flaw to cause a denial of service or possibly execute arbitrary code with user privileges. Various other issues were also addressed.
cec298eba7976ebaa181ffd4c17d9f86fd8b7f0120e64642a7761c57933776cdRed Hat Security Advisory 2012-0070-01 - Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks. A denial of service flaw was found in the implementation of associative arrays in Ruby. An attacker able to supply a large number of inputs to a Ruby application that are used as keys when inserting data into an array could trigger multiple hash function collisions, making array operations take an excessive amount of CPU time. To mitigate this issue, randomization has been added to the hash function to reduce the chance of an attacker successfully causing intentional collisions.
03b3e4cae76347af80bc92c207769ad0a2a84889ef025d717522605f2284e476Red Hat Security Advisory 2012-0069-01 - Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks. A denial of service flaw was found in the implementation of associative arrays in Ruby. An attacker able to supply a large number of inputs to a Ruby application that are used as keys when inserting data into an array could trigger multiple hash function collisions, making array operations take an excessive amount of CPU time. To mitigate this issue, randomization has been added to the hash function to reduce the chance of an attacker successfully causing intentional collisions.
f7e42c50959c0fb32cbaa649ddc8262f37b293afa41649f8324f881d14fac350A variety of programming languages suffer from a denial-of-service (DoS) condition against storage functions of key/value pairs in hash data structures, the condition can be leveraged by exploiting predictable collisions in the underlying hashing algorithms.
0b2b66a010f07afd3a21848f6c4de292e1d20c5873c836998313c0f5f90e9999Most hash functions used in hash table implementations can be broken faster than by using brute-force techniques (which is feasible for hash functions with 32 bit output, but very expensive for 64 bit functions) by using one of two "tricks": equivalent substrings or a meet-in-the-middle attack.
5ba7d905a60a09b9e51b4bfc83a4c27718fe15666e0535630b7937cc69f6152f
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