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CVE-2021-30065

HIGHCVSS 7.5/10EPSS 0.85%

Last modified

CVE-2021-30065 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. On Schneider Electric ConneXium Tofino Firewall TCSEFEA23F3F22 before 03.23, TCSEFEA23F3F20/21, and Belden Tofino Xenon Security Appliance, crafted ModBus packets can bypass the ModBus enforcer. NOTE: this issue exists because of an incomplete fix of CVE-2017-11401.. EPSS estimates a 0.85% chance of exploitation in the next 30 days.

Description

On Schneider Electric ConneXium Tofino Firewall TCSEFEA23F3F22 before 03.23, TCSEFEA23F3F20/21, and Belden Tofino Xenon Security Appliance, crafted ModBus packets can bypass the ModBus enforcer. NOTE: this issue exists because of an incomplete fix of CVE-2017-11401.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
0.85%

53.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
BeldenTofino Xenon Security Appliance Firmware< 03.2.03
BeldenTofino Argon Fa-Tsa-220-Tx\/Mm FirmwareAll versions
BeldenTofino Argon Fa-Tsa-220-Tx\/Tx FirmwareAll versions
BeldenTofino Argon Fa-Tsa-220-Mm\/Tx FirmwareAll versions
BeldenTofino Argon Fa-Tsa-220-Mm\/Mm FirmwareAll versions
BeldenTofino Argon Fa-Tsa-100-Tx\/Tx FirmwareAll versions
BeldenEagle 20 Tofino 943 987-505-Mm\/Mm FirmwareAll versions
BeldenEagle 20 Tofino 943 987-504-Mm\/Tx FirmwareAll versions
BeldenEagle 20 Tofino 943 987-502 -Tx\/Mm FirmwareAll versions
BeldenEagle 20 Tofino 943 987-501-Tx\/Tx FirmwareAll versions
Schneider-ElectricTcsefea23f3f20 FirmwareAll versions
Schneider-ElectricTcsefea23f3f21 FirmwareAll versions
Schneider-ElectricTcsefea23f3f22 Firmware< 03.23

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-30065?
On Schneider Electric ConneXium Tofino Firewall TCSEFEA23F3F22 before 03.23, TCSEFEA23F3F20/21, and Belden Tofino Xenon Security Appliance, crafted ModBus packets can bypass the ModBus enforcer. NOTE: this issue exists because of an incomplete fix of CVE-2017-11401.
How severe is CVE-2021-30065?
CVE-2021-30065 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.
How do I fix CVE-2021-30065?
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-2021-30065?

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

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Source: NVD / NIST