Realport
CVE-2021-35977
CRITICAL
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists in the handling of ADDP discovery response messages. This could result in arbitrary code execution.
AnalysisAI
An issue was discovered in Digi RealPort for Windows through 4.8.488.0. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists in the handling of ADDP discovery response messages. This could result in arbitrary code execution. Affected products include: Digi Realport, Digi Connectport Ts 8\/16 Firmware, Digi Connectport Lts 8\/16\/32 Firmware, Digi Passport Integrated Console Server Firmware, Digi Cm Firmware. Version information: through 4.8.488.0..
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.
In Digi RealPort through 4.10.490, authentication relies on a challenge-response mechanism that gives access to the serv
Digi RealPort Protocol is vulnerable to a replay attack that may allow an attacker to bypass authentication to access co
An issue was discovered in Digi RealPort through 4.8.488.0. Rated high severity (CVSS 8.1), this vulnerability is remote
Same weakness CWE-120 – Classic Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today