Ruby alias and directory operation security bypass

ruby-alias-directory-security-bypass (27725) The risk level is classified as MediumMedium Risk

Description:

Ruby could allow an attacker to bypass security caused by an error in the alias functionality and by improper validation of directory operations. A local or remote attacker could exploit these vulnerabilities to bypass security and close certain directory streams.

*CVSS:

Base Score: 4.7
  Access Vector: Remote
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 3.5
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Bypass Security

Remedy:

Apply the fix for this vulnerability, available from the Ruby CVS Repository. See References.

For Red Hat Linux:
Refer to RHSA-2006:0604-5 for patch, upgrade, or suggested workaround information. See References.

For Debian GNU/Linux:
Refer to DSA-1157-1 for patch, upgrade, or suggested workaround information. See References.

For OpenPKG:
Refer to OpenPKG Security Advisory OpenPKG-SA-2006-016 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

  • Ruby CVS Repository: Ruby CVS Repository Guide - Ruby Home Page.
  • Ruby Web site: Ruby Home Page.
  • ASA-2006-150: ruby security update (RHSA-2006-0604)
  • BID-18944: Yukihiro Matsumoto Ruby Multiple SAFE Level Restriction Bypass Vulnerabilities
  • CVE-2006-3694: Multiple unspecified vulnerabilities in Ruby before 1.8.5 allow remote attackers to bypass safe level checks via unspecified vectors involving (1) the alias function and (2) directory operations.
  • DSA-1139: ruby1.6 -- missing privilege checks
  • DSA-1157: ruby1.8 -- several vulnerabilities
  • MDKSA-2006:134: Updated ruby packages fix safe-level vulnerabilities
  • OpenPKG-SA-2006.016: Ruby
  • OSVDB ID: 27144: Ruby alias Function Safe Level Security Bypass
  • OSVDB ID: 27145: Ruby Directory Operations Safe Level Security Bypass
  • RHSA-2006-0604: ruby security update
  • SA21009: Ruby Safe Level Security Bypass Vulnerabilities
  • SUSE-SR:2006:021: SUSE Security Summary Report
  • USN-325-1: ruby1.8 vulnerability
  • VUPEN/ADV-2006-2760: Ruby Alias Functionality and Directory Operations Safe Level Security Bypass Vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 5.04
  • Canonical Ubuntu 5.10
  • Canonical Ubuntu 6.06 LTS
  • Debian Debian Linux 3.1
  • MandrakeSoft Mandrake Linux 2006
  • MandrakeSoft Mandrake Linux 2006 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • OpenPKG OpenPKG 2-STABLE
  • OpenPKG OpenPKG 2.5
  • OpenPKG OpenPKG CURRENT
  • RedHat Enterprise Linux 2.1 ES
  • RedHat Enterprise Linux 2.1 AS
  • RedHat Enterprise Linux 2.1 WS
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 Desktop
  • RedHat Enterprise Linux 3 AS
  • RedHat Enterprise Linux 3 ES
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 4 AS
  • RedHat Linux Advanced Workstation 2.1 Itanium
  • Yukihiro Matsumoto Ruby 1.8.4 and prior

Reported:

Jul 12, 2006

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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