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CVE-2012-4481

Status Candidate

Overview

The safe-level feature in Ruby 1.8.7 allows context-dependent attackers to modify strings via the NameError#to_s method when operating on Ruby objects. NOTE: this issue is due to an incomplete fix for CVE-2011-1005.

Related Files

Gentoo Linux Security Advisory 201412-27
Posted Dec 15, 2014
Authored by Gentoo | Site security.gentoo.org

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.

tags | advisory, denial of service, vulnerability, ruby
systems | linux, gentoo
advisories | CVE-2011-0188, CVE-2011-1004, CVE-2011-1005, CVE-2011-4815, CVE-2012-4481, CVE-2012-5371, CVE-2013-0269, CVE-2013-1821, CVE-2013-4164, CVE-2014-8080, CVE-2014-8090
SHA-256 | 54e66264d3d6d38c3086840b65a1d59298b94700ea2d898a1673e706acdba6e8
Mandriva Linux Security Advisory 2013-200
Posted Jul 26, 2013
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2013-200 - The safe-level feature in Ruby 1.8.7 allows context-dependent attackers to modify strings via the NameError#to_s method when operating on Ruby objects. NOTE: this issue is due to an incomplete fix for CVE-2011-1005. lib/rexml/text.rb in the REXML parser in Ruby before 1.9.3-p392 allows remote attackers to cause a denial of service (memory consumption and crash) via crafted text nodes in an XML document, aka an XML Entity Expansion attack. A flaw was found in Ruby's SSL client's hostname identity check when handling certificates that contain hostnames with NULL bytes. An attacker could potentially exploit this flaw to conduct man-in-the-middle attacks to spoof SSL servers. Note that to exploit this issue, an attacker would need to obtain a carefully-crafted certificate signed by an authority that the client trusts. The updated packages have been patched to correct these issues.

tags | advisory, remote, denial of service, spoof, ruby
systems | linux, mandriva
advisories | CVE-2012-4481, CVE-2013-1821, CVE-2013-4073
SHA-256 | 736656b494186a6b0fd429a99fa38e28936ba86fe90a953f36f4d67cff987694
Mandriva Linux Security Advisory 2013-124
Posted Apr 11, 2013
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2013-124 - Shugo Maedo and Vit Ondruch discovered that Ruby incorrectly allowed untainted strings to be modified in protective safe levels. An attacker could use this flaw to bypass intended access restrictions. It was discovered that Ruby's REXML library did not properly restrict XML entity expansion. An attacker could use this flaw to cause a denial of service by tricking a Ruby application using REXML to read text nodes from specially-crafted XML content, which will result in REXML consuming large amounts of system memory.

tags | advisory, denial of service, ruby
systems | linux, mandriva
advisories | CVE-2012-4466, CVE-2012-4481, CVE-2013-1821
SHA-256 | 3e2e417902b29eb528c22b29313b488fc00b3906282a6db4beb95befcf297016
Red Hat Security Advisory 2013-0612-01
Posted Mar 8, 2013
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2013-0612-01 - Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks. It was discovered that Ruby's REXML library did not properly restrict XML entity expansion. An attacker could use this flaw to cause a denial of service by tricking a Ruby application using REXML to read text nodes from specially-crafted XML content, which will result in REXML consuming large amounts of system memory. It was found that the RHSA-2011:0910 update did not correctly fix the CVE-2011-1005 issue, a flaw in the method for translating an exception message into a string in the Exception class. A remote attacker could use this flaw to bypass safe level 4 restrictions, allowing untrusted code to modify arbitrary, trusted strings, which safe level 4 restrictions would otherwise prevent.

tags | advisory, remote, denial of service, arbitrary, ruby
systems | linux, redhat
advisories | CVE-2012-4481, CVE-2013-1821
SHA-256 | 32e3a547a3c0a24367f1996785cb9cda8c3f06349a10fc8e3db711bfb8a5421d
Red Hat Security Advisory 2013-0129-01
Posted Jan 8, 2013
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2013-0129-01 - Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks. It was found that certain methods did not sanitize file names before passing them to lower layer routines in Ruby. If a Ruby application created files with names based on untrusted input, it could result in the creation of files with different names than expected. It was found that the RHSA-2011:0909 update did not correctly fix the CVE-2011-1005 issue, a flaw in the method for translating an exception message into a string in the Exception class. A remote attacker could use this flaw to bypass safe level 4 restrictions, allowing untrusted code to modify arbitrary, trusted strings, which safe level 4 restrictions would otherwise prevent.

tags | advisory, remote, arbitrary, ruby
systems | linux, redhat
advisories | CVE-2012-4481, CVE-2012-4522
SHA-256 | 4a55277a92d2dade3b633c2eeffa01ad800949b4e81e0fea84bee0fbc3123f94
Ubuntu Security Notice USN-1603-2
Posted Oct 23, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1603-2 - USN-1603-1 fixed vulnerabilities in Ruby. This update provides the corresponding updates for Ubuntu 12.10. Shugo Maedo and Vit Ondruch discovered that Ruby incorrectly allowed untainted strings to be modified in protective safe levels. An attacker could use this flaw to bypass intended access restrictions. Various other issues were also addressed.

tags | advisory, vulnerability, ruby
systems | linux, ubuntu
advisories | CVE-2012-4466, CVE-2012-4481
SHA-256 | d9a385c73d2d95b101e82ca39b2cd7b1993b771ddbdebb4d7ed4d39b33fc8108
Ubuntu Security Notice USN-1603-1
Posted Oct 11, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1603-1 - Shugo Maedo and Vit Ondruch discovered that Ruby incorrectly allowed untainted strings to be modified in protective safe levels. An attacker could use this flaw to bypass intended access restrictions.

tags | advisory, ruby
systems | linux, ubuntu
advisories | CVE-2012-4466, CVE-2012-4481
SHA-256 | f3bd03ff8fe519bcbc1c64b3414f7be1fc1381ec28bdd55a6bd7aa3bf93ad9e0
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