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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
MD5 | 813b38bb3f2ea9ccac81d5704af95024
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
MD5 | 7ca279035d6b48ebee3a8a164700f7cb
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
MD5 | 32a2b110ee58802ade07067f2c0d32a6
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
MD5 | 337f717a696c396f77be96819fd75791
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
MD5 | d016c1b2871c0f3d8a295e0eb1d4a73d
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
MD5 | 5f19c45627a1b6c976821993dabd9854
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
MD5 | e66753ad2971bc193e022373cccef359
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