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The vulnerability of the EVP_CipherUpdate, EVP_EncryptUpdate, and EVP_DecryptUpdate functions in the OpenSSL library for TLS and SSL protocols, related to integer overflow, allows attackers to cause service interruptions.

🗓️ 20 Jul 2021 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 6 Views

OpenSSL EVP CipherUpdate, EncryptUpdate, and DecryptUpdate overflow flaw in TLS/SSL enabling remote service interruption.

Related
Detection
Refs
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: Multiple vulnerabilities in node.js may affect configuration editor used in IBM Business Automation Workflow and IBM Business Process Manager (BPM) - CVE-2020-1971, CVE-2020-8265, CVE-2020-8287
25 Mar 202110:10
–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: IBM App Connect Enterprise Certified Container may be vulnerable to multiple denial of service through the Node.js runtime
30 Apr 202113:25
–ibm
IBM Security Bulletins		Security Bulletin: IBM DataPower Gateway vulnerable to a DoS
16 Aug 202115:33
–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
Rows per page
Vulners
Node
opensslopensslRange1.0.2–1.0.2y
OR
opensslopensslRange1.1.1–1.1.1j
OR
ibmibm_cloud_pak_systemRange<2.3.3.5

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20 Oct 2025 00:00Current
6.6Medium risk
Vulners AI Score6.6
CVSS 25
CVSS 37.5
EPSS0.50732
OpenSSLCipher Update overflowEncrypt Update overflowDecrypt Update overflowTransport Layer SecurityRemote service interruption
6