CVE-2020-27483: Vulnerability Analysis & Exploit Details

CVE-2020-27483 Vulnerability Summary

Garmin Forerunner 235 before 8.20 is affected by: Array index error. The component is: ConnectIQ TVM. The attack vector is: To exploit the vulnerability, the attacker must upload a malicious ConnectIQ application to the ConnectIQ store. The ConnectIQ program interpreter trusts the offset provided for the stack value duplication instruction, DUP. The offset is unchecked and memory prior to the start of the execution stack can be read and treated as a TVM object. A successful exploit could use the vulnerability to leak runtime information such as the heap handle or pointer for a number of TVM context variables. Some reachable values may be controlled enough to forge a TVM object on the stack, leading to possible remote code execution.

CVE-2020-27483: Detailed Information and External References

EPSS

0.00336

EPSS %

0.71217

References

0.00336

• https://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0007.md

CWE

CWE-129

CAPEC

0.00336

• Overflow Buffers: Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an adversary. As a consequence, an adversary is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the adversaries' choice.

Vulnerable Configurations

• cpe:2.3:h:garmin:forerunner_235:-:*:*:*:*:*:*:*
  cpe:2.3:h:garmin:forerunner_235:-:*:*:*:*:*:*:*

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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