Oracle MySQL Server up to 5.7.33/8.0.23 Encryption denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Oracle MySQL Server up to 5.7.33/8.0.23. Affected by this vulnerability is an unknown functionality of the component Encryption. This manipulation causes denial of service. The identification of this vulnerability is CVE-2021-23841. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Oracle MySQL Server up to 5.7.33/8.0.23 (Database Software) and classified as critical. Affected by this vulnerability is an unknown code of the component Encryption. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was shared 04/21/2021 as Oracle Critical Patch Update Advisory - April 2021. The advisory is shared at oracle.com. This vulnerability is known as CVE-2021-23841. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 211827 (Oracle Linux 9 : edk2 (ELSA-2024-12842)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (211827) and CERT Bund (WID-SEC-2022-0669). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Open Source CentOS
  • Open Source OpenSSL
  • Debian Linux
  • Amazon Linux 2
  • FreeBSD Project FreeBSD OS
  • Juniper JUNOS
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Hitachi Command Suite
  • Gentoo Linux
  • Open Source Arch Linux
  • Avaya Aura Communication Manager
  • Avaya Aura Session Manager
  • Avaya Aura Application Enablement Services
  • Avaya Aura System Manager
  • Avaya Web License Manager
  • Pulse Secure Pulse Connect Secure
  • HCL BigFix
  • Hitachi Ops Center
  • Open Source Node.js
  • Meinberg LANTIME
  • Tenable Security Nessus
  • Netscout Arbor AED
  • Netscout Arbor APS
  • Netscout Arbor Sightline
  • Netscout Arbor TMS
  • Tenable Security Nessus Network Monitor
  • HPE Fabric OS
  • Hitachi Configuration Manager
  • F5 BIG-IP
  • Trellix ePolicy Orchestrator
  • IBM Rational Build Forge
  • Dell NetWorker
  • SolarWinds Platform
  • F5 F5OS

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
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Nessus ID: 211827
Nessus Name: Oracle Linux 9 : edk2 (ELSA-2024-12842)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

01/12/2021 🔍
04/21/2021 +98 days 🔍
04/21/2021 +0 days 🔍
04/23/2021 +2 days 🔍
02/06/2026 +1750 days 🔍

Sourcesinfo

Vendor: oracle.com

Advisory: Oracle Critical Patch Update Advisory - April 2021
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-23841 (🔍)
GCVE (CVE): GCVE-0-2021-23841
GCVE (VulDB): GCVE-100-173569
CERT Bund: WID-SEC-2022-0669 - OpenSSL: Mehrere Schwachstellen

Entryinfo

Created: 04/23/2021 06:39
Updated: 02/06/2026 12:59
Changes: 04/23/2021 06:39 (40), 04/26/2021 08:48 (6), 04/26/2021 08:49 (18), 06/22/2024 10:47 (17), 11/26/2024 09:59 (2), 02/06/2026 12:59 (7)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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