Ruby safe level security bypass
| ruby-safelevel-security-bypass (44369) |  Medium Risk |
Description:
Ruby could allow a remote attacker to bypass security restrictions, caused by multiple implementation errors in the safe level restrictions. An attacker could exploit this vulnerability using the untrace_var function, syslog function, $PROGRAM_NAME environment variable, or other insecure methods at safe levels 1 through 3 to bypass security restrictions and launch further attacks against the affected system.
*CVSS:
| Base Score: | 4.3 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | Partial |
| Availability Impact: | None |
| Temporal Score: | 3.2 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
For 1.8 series:
Upgrade to the latest version of Ruby (1.8.6-p287 or 1.8.7-p72 or later), available from the Ruby Programming Language Web site. See References.
For 1.9 series:
Upgrade to the latest version of Ruby (1.9.1 or later), available from the Ruby Core SVN Repository. See References.
References:
- Apple Web site: About the security content of Security Update 2009-002 / Mac OS X v10.5.7.
- Ruby Core SVN Repository: Ruby Core.
- Ruby Programming Language Web site: Multiple vulnerabilities in Ruby.
- ASA-2008-423: ruby security update (RHSA-2008-0896)
- ASA-2008-424: ruby security update (RHSA-2008-0897)
- ASA-2008-425: ruby security update (RHSA-2008-0895)
- BID-30644: Ruby Multiple Security Bypass and Denial of Service Vulnerabilities
- CVE-2008-3655: Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 does not properly restrict access to critical variables and methods at various safe levels, which allows context-dependent attackers to bypass intended access restrictions via (1) untrace_var, (2) $PROGRAM_NAME, and (3) syslog at safe level 4, and (4) insecure methods at safe levels 1 through 3.
- DSA-1651: ruby1.8 -- several vulnerabilities
- DSA-1652: ruby1.9 -- several vulnerabilities
- GLSA-200812-17: Ruby: Multiple vulnerabilities
- MDVSA-2008:226: ruby
- RHSA-2008-0895: Moderate: ruby security update
- RHSA-2008-0896: Moderate: ruby security update
- RHSA-2008-0897: Moderate: ruby security update
- SA31430: Ruby Multiple Vulnerabilities
- SA35074: Apple Mac OS X Security Update Fixes Multiple Vulnerabilities
- SECTRACK ID: 1020656: Ruby Safe Level Access Control Bug Lets Applications Bypass Certain Access Controls
- SUSE-SA:2009:037: dhcp-client security problem
- USN-651-1: Ruby vulnerabilities
- VUPEN/ADV-2008-2334: Ruby Multiple Security Bypass and Denial of Service Vulnerabilities
- VUPEN/ADV-2009-1297: Apple Mac OS X Code Execution and Security Bypass Vulnerabilities
Platforms Affected:
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 7.04
- Canonical Ubuntu 7.10
- Canonical Ubuntu 8.04 LTS
- Debian Debian Linux 4.0
- Gentoo Linux
- MandrakeSoft Mandrake Linux 2008.0 X86_64
- MandrakeSoft Mandrake Linux 2008.0
- MandrakeSoft Mandrake Linux 2008.1
- MandrakeSoft Mandrake Linux 2008.1 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 3.0
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- Novell Linux Desktop 9
- Novell Linux POS 9
- Novell Open Enterprise Server
- Novell OpenSUSE 10.3
- Novell OpenSUSE 11.0
- Novell SLE SDK 10 SP2
- Novell SUSE Linux Enterprise 10 SP2 DEBUGINFO
- Novell SUSE Linux Enterprise Desktop 10 SP2
- Novell SUSE Linux Enterprise Server 10 SP2
- RedHat Enterprise Linux 2.1 AS
- RedHat Enterprise Linux 2.1 ES
- RedHat Enterprise Linux 2.1 WS
- RedHat Enterprise Linux 3 WS
- RedHat Enterprise Linux 3 ES
- RedHat Enterprise Linux 3 Desktop
- RedHat Enterprise Linux 3 AS
- RedHat Enterprise Linux 4 AS
- RedHat Enterprise Linux 4 ES
- RedHat Enterprise Linux 4 Desktop
- RedHat Enterprise Linux 4 WS
- RedHat Enterprise Linux 5 Client
- RedHat Enterprise Linux 5 Client Workstation
- RedHat Enterprise Linux 5
- Ruby-lang Ruby 1.8.5 and prior
- Ruby-lang Ruby 1.8.6-p286 and prior
- Ruby-lang Ruby 1.8.7 P71
- Ruby-lang Ruby 1.9
- SuSE SuSE SLES 9
Reported:
Aug 08, 2008
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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.