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CVE-2021-36767

CRITICALCVSS 9.8/10EPSS 0.66%

Last modified

CVE-2021-36767 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In Digi RealPort through 4.10.490, authentication relies on a challenge-response mechanism that gives access to the server password, making the protection ineffective. An attacker may send an unauthenticated request to the server. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

In Digi RealPort through 4.10.490, authentication relies on a challenge-response mechanism that gives access to the server password, making the protection ineffective. An attacker may send an unauthenticated request to the server. The server will reply with a weakly-hashed version of the server's access password. The attacker may then crack this hash offline in order to successfully login to the server.

Metrics

CVSS 3.1
9.8/10

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

EPSS Probability
0.66%

47.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
DigiRealport<= 1.9-40
DigiRealport<= 4.10.490
DigiConnectport Ts 8\/16 FirmwareAll versions
DigiConnectport Lts 8\/16\/32 FirmwareAll versions
DigiPassport Integrated Console Server FirmwareAll versions
DigiCm FirmwareAll versions
DigiPortserver Ts FirmwareAll versions
DigiPortserver Ts Mei FirmwareAll versions
DigiPortserver Ts Mei Hardened FirmwareAll versions
DigiPortserver Ts M Mei FirmwareAll versions
Digi6350-Sr FirmwareAll versions
DigiPortserver Ts P Mei FirmwareAll versions
DigiTransport Wr11 Xt FirmwareAll versions
DigiOne Ia FirmwareAll versions
DigiWr31 FirmwareAll versions
DigiWr44 R FirmwareAll versions
DigiConnect Es FirmwareAll versions
DigiWr21 FirmwareAll versions
DigiOne Iap FirmwareAll versions
DigiOne Iap Haz FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-36767?
In Digi RealPort through 4.10.490, authentication relies on a challenge-response mechanism that gives access to the server password, making the protection ineffective. An attacker may send an unauthenticated request to the server. The server will reply with a weakly-hashed version of the server's access password. The attacker may then crack this hash offline in order to successfully login to the server.
How severe is CVE-2021-36767?
CVE-2021-36767 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.
How do I fix CVE-2021-36767?
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-2021-36767?

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

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Source: NVD / NIST