VulnerabilityAnalyzed
CVE-2021-34584
Crafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22.
CRITICAL 9.1EPSS 1.11%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.11%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Crafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22.
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 1.11% probability · 64th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-126
- Affected
- wago/750-823 firmware · wago/750-829 firmware · wago/750-831 firmware · wago/750-832 firmware · wago/750-852 firmware · wago/750-862 firmware · wago/750-880 firmware · wago/750-881 firmware · wago/750-882 firmware · wago/750-885 firmware · wago/750-889 firmware · wago/750-890 firmware · wago/750-891 firmware · wago/750-893 firmware · wago/750-8202 firmware · wago/750-8203 firmware · wago/750-8204 firmware · wago/750-8206 firmware · wago/750-8207 firmware · wago/750-8208 firmware · +8 more
- Source
- info@cert.vde.com
References
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16876&token=a3f1d937f95e7034879f4f2ea8e5a99b168256a7&download=Vendor Advisory
- https://www.tenable.com/security/research/tra-2021-47Exploit, Third Party Advisory
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16876&token=a3f1d937f95e7034879f4f2ea8e5a99b168256a7&download=Vendor Advisory
- https://www.tenable.com/security/research/tra-2021-47Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.