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CVE-2021-33535

HIGHCVSS 8.8/10EPSS 1.61%

Last modified

CVE-2021-33535 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. In Weidmueller Industrial WLAN devices in multiple versions an exploitable format string vulnerability exists in the iw_console conio_writestr functionality. A specially crafted time server entry can cause an overflow of the time server buffer, resulting in remote code execution. EPSS estimates a 1.61% chance of exploitation in the next 30 days.

Description

In Weidmueller Industrial WLAN devices in multiple versions an exploitable format string vulnerability exists in the iw_console conio_writestr functionality. A specially crafted time server entry can cause an overflow of the time server buffer, resulting in remote code execution. An attacker can send commands while authenticated as a low privilege user to trigger this vulnerability.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
1.61%

72.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
WeidmuellerIe-Wl-Bl-Ap-Cl-Eu Firmware<= 1.16.18
WeidmuellerIe-Wlt-Bl-Ap-Cl-Eu Firmware<= 1.16.18
WeidmuellerIe-Wl-Bl-Ap-Cl-Us Firmware<= 1.16.18
WeidmuellerIe-Wlt-Bl-Ap-Cl-Us Firmware<= 1.16.18
WeidmuellerIe-Wl-Vl-Ap-Br-Cl-Eu Firmware<= 1.16.18
WeidmuellerIe-Wlt-Vl-Ap-Br-Cl-Eu Firmware<= 1.16.18
WeidmuellerIe-Wl-Vl-Ap-Br-Cl-Us Firmware<= 1.16.18
WeidmuellerIe-Wlt-Vl-Ap-Br-Cl-Us Firmware<= 1.16.18
WeidmuellerIe-Wl-Bl-Ap-Cl-Eu Firmware<= 1.11.10
WeidmuellerIe-Wlt-Bl-Ap-Cl-Eu Firmware<= 1.11.10
WeidmuellerIe-Wl-Bl-Ap-Cl-Us Firmware<= 1.11.10
WeidmuellerIe-Wlt-Bl-Ap-Cl-Us Firmware<= 1.11.10
WeidmuellerIe-Wl-Vl-Ap-Br-Cl-Eu Firmware<= 1.11.10
WeidmuellerIe-Wlt-Vl-Ap-Br-Cl-Eu Firmware<= 1.11.10
WeidmuellerIe-Wl-Vl-Ap-Br-Cl-Us Firmware<= 1.11.10
WeidmuellerIe-Wlt-Vl-Ap-Br-Cl-Us Firmware<= 1.11.10

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-33535?
In Weidmueller Industrial WLAN devices in multiple versions an exploitable format string vulnerability exists in the iw_console conio_writestr functionality. A specially crafted time server entry can cause an overflow of the time server buffer, resulting in remote code execution. An attacker can send commands while authenticated as a low privilege user to trigger this vulnerability.
How severe is CVE-2021-33535?
CVE-2021-33535 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.61% probability of exploitation in the next 30 days.
How do I fix CVE-2021-33535?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-33535?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST