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Vulnerability details: VCID-xtny-ychb-fff1
Vulnerability ID VCID-xtny-ychb-fff1
Aliases CVE-2009-0642
GHSA-4gvm-4mw2-9fpv
Summary ruby: Incorrect checks for validity of X.509 certificates
Status Published
Exploitability 0.5
Weighted Severity 6.1
Risk 3.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-287 Improper Authentication
System Score Found at
epss 0.00974 https://api.first.org/data/v1/epss?cve=CVE-2009-0642
epss 0.00974 https://api.first.org/data/v1/epss?cve=CVE-2009-0642
epss 0.00974 https://api.first.org/data/v1/epss?cve=CVE-2009-0642
epss 0.00974 https://api.first.org/data/v1/epss?cve=CVE-2009-0642
epss 0.00974 https://api.first.org/data/v1/epss?cve=CVE-2009-0642
epss 0.00974 https://api.first.org/data/v1/epss?cve=CVE-2009-0642
epss 0.00974 https://api.first.org/data/v1/epss?cve=CVE-2009-0642
epss 0.00974 https://api.first.org/data/v1/epss?cve=CVE-2009-0642
epss 0.00974 https://api.first.org/data/v1/epss?cve=CVE-2009-0642
epss 0.00974 https://api.first.org/data/v1/epss?cve=CVE-2009-0642
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2009-0642
Reference id Reference type URL
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513528
http://redmine.ruby-lang.org/issues/show/1091
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2009-0642.json
https://api.first.org/data/v1/epss?cve=CVE-2009-0642
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513528
http://secunia.com/advisories/33750
http://secunia.com/advisories/35699
http://secunia.com/advisories/35937
https://exchange.xforce.ibmcloud.com/vulnerabilities/48761
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11450
http://www.mandriva.com/security/advisories?name=MDVSA-2009:193
http://www.redhat.com/support/errata/RHSA-2009-1140.html
http://www.securityfocus.com/bid/33769
http://www.securitytracker.com/id?1022505
http://www.ubuntu.com/usn/USN-805-1
486183 https://bugzilla.redhat.com/show_bug.cgi?id=486183
cpe:2.3:a:ruby-lang:ruby:1.8:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:ruby-lang:ruby:1.8:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:1.9:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:ruby-lang:ruby:1.9:*:*:*:*:*:*:*
CVE-2009-0642 https://nvd.nist.gov/vuln/detail/CVE-2009-0642
RHSA-2009:1140 https://access.redhat.com/errata/RHSA-2009:1140
USN-805-1 https://usn.ubuntu.com/805-1/
No exploits are available.
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2009-0642
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Exploit Prediction Scoring System (EPSS)
Percentile 0.76618
EPSS Score 0.00974
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T14:58:32.029951+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2009-0642.json 38.0.0