TI-2009-00618 Aliases CVE-2009-0642 GHSA-4gvm-4mw2-9fpv

ext/openssl/ossl_ocsp.c in Ruby 1.8 and 1.9 does not properly check the return value from…

LOW 35CWE-287Published 2009-02-18 · Updated 2024-08-07

Key facts

Attack vector: Network
Privileges required: None
User interaction: — Not recorded in CVSS 2.0
Attack complexity: Medium
Impact type: Security bypass
Confidentiality · integrity · availability: Partial · Partial · Partial
Fix status: Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-287.

Summary

ext/openssl/ossl_ocsp.c in Ruby 1.8 and 1.9 does not properly check the return value from the OCSP_basic_verify function, which might allow remote attackers to successfully present an invalid X.509 certificate, possibly involving a revoked certificate.

Why it matters now

EPSS 0.0264 85th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed Red Hat: 1 advisory

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:ruby-lang:ruby:1.8:::::::*	1.8	Vulnerable	ruby
cpe:2.3:a:ruby-lang:ruby:1.9:::::::*	1.9	Vulnerable	ruby

cpe:2.3:a:ruby-lang:ruby:1.8:*:*:*:*:*:*:* Versions 1.8 Vulnerable ·ruby
cpe:2.3:a:ruby-lang:ruby:1.9:*:*:*:*:*:*:* Versions 1.9 Vulnerable ·ruby

Remediation

Red Hat 1 advisory

RHSA-2009:1140 Released 2009-07-02 · Red Hat rating Moderate
ruby security update
- Red Hat Enterprise Linux (v. 5 server) ruby-1.8.5-5.el5_3.7, ruby-1.8.5-5.el5_3.7.i386, ruby-1.8.5-5.el5_3.7.ia64 +33
- Red Hat Enterprise Linux AS version 4 irb-1.8.1-7.el4_8.3, irb-1.8.1-7.el4_8.3.i386, irb-1.8.1-7.el4_8.3.ia64 +25
- Red Hat Enterprise Linux Desktop (v. 5 client) ruby-1.8.5-5.el5_3.7, ruby-1.8.5-5.el5_3.7.i386, ruby-docs-1.8.5-5.el5_3.7 +11
- Red Hat Enterprise Linux Desktop Workstation (v. 5 client) ruby-1.8.5-5.el5_3.7, ruby-devel-1.8.5-5.el5_3.7, ruby-devel-1.8.5-5.el5_3.7.i386 +2
- Red Hat Enterprise Linux Desktop version 4 irb-1.8.1-7.el4_8.3, irb-1.8.1-7.el4_8.3.i386, ruby-1.8.1-7.el4_8.3 +11
- Red Hat Enterprise Linux ES version 4 irb-1.8.1-7.el4_8.3, irb-1.8.1-7.el4_8.3.i386, irb-1.8.1-7.el4_8.3.ia64 +18
- Red Hat Enterprise Linux WS version 4 irb-1.8.1-7.el4_8.3, irb-1.8.1-7.el4_8.3.i386, irb-1.8.1-7.el4_8.3.ia64 +18

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux (v. 5 server)	Fixed	RHSA-2009:1140
Red Hat Enterprise Linux AS version 4	Fixed	RHSA-2009:1140
Red Hat Enterprise Linux Desktop (v. 5 client)	Fixed	RHSA-2009:1140
Red Hat Enterprise Linux Desktop Workstation (v. 5 client)	Fixed	RHSA-2009:1140
Red Hat Enterprise Linux Desktop version 4	Fixed	RHSA-2009:1140
Red Hat Enterprise Linux ES version 4	Fixed	RHSA-2009:1140
Red Hat Enterprise Linux WS version 4	Fixed	RHSA-2009:1140

Timeline

2026-10-02 Threatist record created from CVE-2009-0642
2026-10-03 Alias added: GHSA-4gvm-4mw2-9fpv

References

Exploit 1

http://redmine.ruby-lang.org/issues/show/1091

Advisory 3

Other 2

TI-2026-71508 Integer overflow in GitLab allows code execution on the server KEVCVSS 3.1CRITICAL 10.0
TI-2017-12709 Ruby before 2.4.3 allows Net::FTP command injection. CVSS 3.0HIGH 8.8
TI-2008-03501 Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value… CVSS 2.0HIGH 7.8
TI-2021-09891 In Ruby through 3.0 on Windows, a remote attacker can submit a crafted path when a Web… CVSS 3.1HIGH 7.5
TI-2013-03637 Heap-based buffer overflow in Ruby 1.8, 1.9 before 1.9.3-p484, 2.0 before 2.0.0-p353, 2.1… CVSS 2.0MEDIUM 6.8
TI-2018-11751 An issue was discovered in the OpenSSL library in Ruby before 2.3.8, 2.4.x before 2.4.5… CVSS 3.0CRITICAL 9.8

See all 92 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences