CVE-2021-34585

mediumPriorität · verfolgen · 20EPSS 0.009 · 59. PerzentilDEEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.90% (59th) EPSS
CVSS 5 · medium
Is it mine?
83 products
Prüfe deine Angriffsfläche
Who says so?
4 sources
cnnvd · enisa_euvd · nvd · phoenix_contact_psirt

EPSS · bewertet 2026-10-23

In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests can trigger a parser error. Since the parser result is not checked under all conditions, a pointer dereference with an invalid address can occur. This leads to a denial of service situation.

01

Behebungen

Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.

Ein Hersteller-Fix ist verfügbar.

  • Behobenphoenix_contact_psirt

    UPDATE A: fixed Firmware versions for 750-890/0xx-xxx, 750-891 and 750-893 We recommend all effected users with CODESYS 2.3 Runtime PLCs to update to the firmware version listed below. Series Ethernet Controller | Article Number | Fixed Firmware Versions | Available | |-------------------------|--------------------------|---------------------------| | 750-823 | >=FW10 | January 2022 | | 750-829 | >=FW17 | After BACnet certification | | 750-831/000-00x | >=FW17 | After BACnet certification | | 750-832/000-00x | >=FW10 | After BACnet certification | | 750-852 | >=FW17 | Q1 2022 | | 750-862 | >=FW10 | January 2022 | | 750-880/0xx-xxx | >=FW17 | Q1 2022 | | 750-881 | >=FW17 | Q1 2022 | | 750-882 | >=FW17 | Q1 2022 | | 750-885/0xx-xxx | >=FW17 | Q1 2022 | | 750-889 | >=FW17 | Q1 2022 | | 750-890/0xx-xxx | >=FW10 | January 2022 | | 750-891 | >=FW10 | January 2022 | | 750-893 | >=FW10 | January 2022 | PFC200 Controller | Article Number | Affected Firmware Versions | Approx. Available | |-------------------------|----------------------------|--------------------| | 750-8202/xxx-xxx | >=FW20 | January 2022 | | 750-8203/xxx-xxx | >=FW20 | January 2022 | | 750-8204/xxx-xxx | >=FW20 | January 2022 | | 750-8206/xxx-xxx | >=FW20 | January 2022 | | 750-8207/xxx-xxx | >=FW20 | January 2022 | | 750-8208/xxx-xxx | >=FW20 | January 2022 | | 750-8210/xxx-xxx | >=FW20 | January 2022 | | 750-8211/xxx-xxx | >=FW20 | January 2022 | | 750-8212/xxx-xxx | >=FW20 | January 2022 | | 750-8213/xxx-xxx | >=FW20 | January 2022 | | 750-8214/xxx-xxx | >=FW20 | January 2022 | | 750-8216/xxx-xxx | >=FW20 | January 2022 | | 750-8217/xxx-xxx | >=FW20 | January 2022 |

  • Mitigationphoenix_contact_psirt

    1. Use general security best practices to protect systems from local and network attacks. 2. Do not allow direct access to the device from untrusted networks. 3. Update to the latest firmware according to the table in chapter solutions. 4. Disable the CODESYS 2.3 WebVisualisation and CODESYS 2.3 port 2455. For further impact information and risk mitigation, please refer to the official CODESYS Advisory Website at https://www.codesys.com/security/security-reports.html

02

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

7.5
010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 4.3–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USAusnutzbarkeit 10 · Auswirkung 2.9
v2.04.3mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · NVD / NIST USAusnutzbarkeit 3.9 · Auswirkung 3.6
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · info@cert.vde.comAusnutzbarkeit 3.9 · Auswirkung 3.6
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Phoenix Contact PSIRT DE
03

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-252USCWE-252US
04

betroffene Produkte (83)

Betroffene Produkte und Versionsbereiche.

20 von 83 angezeigt
05

Advisories (1)

Hersteller- und Ökosystem-Meldungen dazu.

  • VDE-2021-056WAGO: Multiple Vulnerabilities in CODESYS Runtime 2.3 and WebVisualisation2021-11-16csaf · phoenix_contact_psirtDE

    Multiple vulnerabilities were reported in CODESYS 2.3 Runtime. The CODESYS 2.3 Runtime is an essential component in several WAGO PLCs. All vulnerable PLCs are listed in chapter 'Affected Products'. https://www.codesys.com/security/security-reports.html

06

auch bekannt als (3)

Weitere Namen und Kennungen dieser Entität.

07

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvdenisa_euvdnvdphoenix_contact_psirtNVDCVE.orgMITRE
veröffentlicht 2021-10-26geändert 2026-06-17
08

Referenzen (7)

Externe Belege — Patches, Meldungen, Analysen.

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