CODESYS V2 Web Server prior 1.1.9.22 Web Request stack-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in CODESYS V2 Web Server. Affected is an unknown function of the component Web Request Handler. Performing a manipulation results in stack-based overflow. This vulnerability is known as CVE-2021-34584. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in CODESYS V2 Web Server (Web Server). It has been classified as critical. This affects some unknown processing of the component Web Request Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on availability.

The weakness was published 10/26/2021. It is possible to read the advisory at customers.codesys.com. This vulnerability is uniquely identified as CVE-2021-34584 since 06/10/2021. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 1.1.9.22 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.8

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CNA Base Score: 9.1
CNA Vector (CERT@VDE): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: V2 Web Server 1.1.9.22

Timelineinfo

06/10/2021 🔍
10/26/2021 +138 days 🔍
10/26/2021 +0 days 🔍
08/15/2025 +1389 days 🔍

Sourcesinfo

Advisory: customers.codesys.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-34584 (🔍)
GCVE (CVE): GCVE-0-2021-34584
GCVE (VulDB): GCVE-100-185415

Entryinfo

Created: 10/26/2021 15:29
Updated: 08/15/2025 23:03
Changes: 10/26/2021 15:29 (49), 10/30/2021 15:46 (2), 10/30/2021 15:52 (18), 08/15/2025 23:03 (19)
Complete: 🔍
Cache ID: 216::103

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