750 823 Firmware
CVE-2021-34596
MEDIUM
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
1DescriptionNVD
A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition.
AnalysisAI
A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified under CWE-824. A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition. Affected products include: Wago 750-823 Firmware, Wago 750-829 Firmware, Wago 750-831 Firmware, Wago 750-832 Firmware, Wago 750-852 Firmware.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
More in 750 823 Firmware
View allCrafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service con
In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests may cause a Null pointer dereference in the
In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests can trigger a parser error. Rated high sever
Crafted web server requests may cause a heap-based buffer overflow and could therefore trigger a denial-of- service cond
WAGO 750-88X and WAGO 750-89X Ethernet Controller devices, versions 01.09.18(13) and before, have XSS in the SNMP config
CODESYS V2 Web-Server before 1.1.9.20 has an Out-of-bounds Write. Rated critical severity (CVSS 9.8), this vulnerability
CODESYS V2 Web-Server before 1.1.9.20 has an Improperly Implemented Security Check. Rated critical severity (CVSS 9.8),
CODESYS V2 Web-Server before 1.1.9.20 has Improper Access Control. Rated critical severity (CVSS 9.8), this vulnerabilit
CODESYS V2 Web-Server before 1.1.9.20 has a Stack-based Buffer Overflow. Rated critical severity (CVSS 9.8), this vulner
CODESYS V2 runtime system SP before 2.4.7.55 has a Stack-based Buffer Overflow. Rated critical severity (CVSS 9.8), this
CODESYS V2 Web-Server before 1.1.9.20 has an Out-of-bounds Read. Rated critical severity (CVSS 9.1), this vulnerability
Improper Authentication vulnerability in WAGO 750-8XX series with FW version <= FW03 allows an attacker to change the se
Same weakness CWE-824 – Access of Uninitialized Pointer
View allSame technique Memory Corruption
View allShare
External POC / Exploit Code
Leaving vuln.today