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CRITICAL · 9.8

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 unauthen...

Vulnerability 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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
DigiRealport<= 1.9-40
DigiConnectport Ts 8\/16 FirmwareAll versions
DigiConnectport Ts 8\/16-
DigiConnectport Lts 8\/16\/32 FirmwareAll versions
DigiConnectport Lts 8\/16\/32-
DigiPassport Integrated Console Server FirmwareAll versions
DigiPassport Integrated Console Server-
DigiCm FirmwareAll versions
DigiCm-
DigiPortserver Ts FirmwareAll versions
DigiPortserver Ts-
DigiPortserver Ts Mei FirmwareAll versions
DigiPortserver Ts Mei-
DigiPortserver Ts Mei Hardened FirmwareAll versions
DigiPortserver Ts Mei Hardened-
DigiPortserver Ts M Mei FirmwareAll versions
DigiPortserver Ts M Mei-
Digi6350-Sr FirmwareAll versions
Digi6350-Sr-
DigiPortserver Ts P Mei FirmwareAll versions

Related Weaknesses (CWE)

CWE-916

References

FAQ

What is CVE-2021-36767?

CVE-2021-36767 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 unauthen...

How severe is CVE-2021-36767?

CVE-2021-36767 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-36767?

Check the references section above for vendor advisories and patch information. Affected products include: Digi Realport, Digi Connectport Ts 8\/16 Firmware, Digi Connectport Ts 8\/16, Digi Connectport Lts 8\/16\/32 Firmware, Digi Connectport Lts 8\/16\/32.