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CVE-2021-23841

🗓️ 16 Feb 2021 16:55:18Reported by opensslType 
cve
 cve🔗 web.nvd.nist.gov📰️ 10 Media mentions👁 1999 Views

The OpenSSL public API function X509_issuer_and_serial_hash() in OpenSSL 1.1.1i and below mishandles issuer field errors, possibly leading to a DDoS attack

Related
Detection
Affected
Refs
Social
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: Vulnerabilities in OpenSSL affect IBM Rational ClearQuest
29 Jun 202115:25
–ibm
IBM Security Bulletins		Security Bulletin: Multiple vulnerabilities affect IBM® SDK for Node.js™ in IBM Cloud
11 Mar 202117:48
–ibm
IBM Security Bulletins		Security Bulletin: IBM Flex System switch firmware products are affected by vulnerabilities in OpenSSL
7 Dec 202323:00
–ibm
IBM Security Bulletins		Security Bulletin: IBM Engineering Workflow Management (EWM) vulnerabilities CVE-2021-23839, CVE-2021-23840, CVE-2021-23841
7 Jul 202315:15
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerability in Fabric OS firmware used by IBM b-type SAN directors and switches.
31 Aug 202200:06
–ibm
IBM Security Bulletins		Security Bulletin: Multiple vulnerabilites affect Engineering Lifecycle Management and IBM Engineering products.
27 Jul 202121:32
–ibm
IBM Security Bulletins		Security Bulletin: IBM InfoSphere Master Data Management Server vulnerability in OpenSSL
27 Apr 202210:23
–ibm
IBM Security Bulletins		Security Bulletin: Vulnerabilities in OpenSSL affect Cloud Pak System (CVE-2021-23840, CVE-2021-23841)
4 Jul 202302:14
–ibm
IBM Security Bulletins		Security Bulletin: Multiple vulnerabilities in OpenSSL affect IBM Tivoli Netcool System Service Monitors/Application Service Monitors
14 Jul 202118:41
–ibm
IBM Security Bulletins		Security Bulletin:Multiple vulnerabilities fixed in IBM Security Verify Bridge - Docker
22 Sep 202122:32
–ibm
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NVD
Vulners
Node
opensslopensslRange1.0.2–1.0.2y
OR
opensslopensslRange1.1.1–1.1.1j
Node
debiandebian_linuxMatch10.0
Node
tenablenessus_network_monitorMatch5.11.0
OR
tenablenessus_network_monitorMatch5.11.1
OR
tenablenessus_network_monitorMatch5.12.0
OR
tenablenessus_network_monitorMatch5.12.1
OR
tenablenessus_network_monitorMatch5.13.0
OR
tenabletenable.scRange5.13.0–5.17.0
Node
applesafariRange<14.1.1
OR
appleipadosRange<14.6
OR
appleiphone_osRange<14.6
OR
applemacosRange11.1–11.4
Node
netapponcommand_insightMatch-
OR
netapponcommand_workflow_automationMatch-
OR
netappsnapcenterMatch-
Node
oraclebusiness_intelligenceMatch5.5.0.0.0enterprise
OR
oraclebusiness_intelligenceMatch5.9.0.0.0enterprise
OR
oraclebusiness_intelligenceMatch12.2.1.3.0enterprise
OR
oraclebusiness_intelligenceMatch12.2.1.4.0enterprise
OR
oraclecommunications_cloud_native_core_policyMatch1.15.0
OR
oracleenterprise_manager_for_storage_managementMatch13.4.0.0
OR
oracleenterprise_manager_ops_centerMatch12.4.0.0
OR
oracleessbaseMatch21.2
OR
oraclegraalvmMatch19.3.5enterprise
OR
oraclegraalvmMatch20.3.1.2enterprise
OR
oraclegraalvmMatch21.0.0.2enterprise
OR
oraclejd_edwards_world_securityMatcha9.4
OR
oraclemysql_enterprise_monitorRange<8.0.23
OR
oraclemysql_serverRange<5.7.33
OR
oraclemysql_serverRange8.0.15–8.0.23
OR
oraclepeoplesoft_enterprise_peopletoolsMatch8.57
OR
oraclepeoplesoft_enterprise_peopletoolsMatch8.58
OR
oraclepeoplesoft_enterprise_peopletoolsMatch8.59
OR
oraclezfs_storage_appliance_kitMatch8.8
Node
siemenssinec_insRange<1.0
OR
siemenssinec_insMatch1.0-
OR
siemenssinec_insMatch1.0sp1
[
  {
    "vendor": "OpenSSL",
    "product": "OpenSSL",
    "versions": [
      {
        "version": "Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i)",
        "status": "affected"
      },
      {
        "version": "Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x)",
        "status": "affected"
      }
    ]
  }
]
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17 Jun 2026 03:38Current
7High risk
Vulners AI Score7
CVSS 24.3
CVSS 3.15.9
EPSS0.07471
SSVC
CWE-476
cve-2021-23841opensslx509_issuer_and_serial_hashddosdenial of servicesecurity updatenvd
1999