What is CVE-2023-23300?

CVE-2023-23300 is a critical-severity vulnerability in Garmin Connect-Iq, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-05-23.

How severe is CVE-2023-23300?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-23300 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Garmin Connect-Iq

CVE-2023-23300

The `Toybox.Cryptography.Cipher.initialize` API method in CIQ API version 3.0.0 through 4.1.7 does not validate its parameters, which can result in buffer overflows when copying data. A malicious application could call the API method with specially crafted parameters and hijack the execution of the device's firmware.

Vulnerability class: Buffer Overflow

EPSS: 0.013 (66.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Garmin Connect-iq
N/a — versions n/a

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

anvilsecure/garmin-ciq-app-research

References

cve@mitre.org (Product)
cve@mitre.org (Exploit)

Frequently asked questions

What is CVE-2023-23300?: CVE-2023-23300 is a critical-severity vulnerability in Garmin Connect-Iq, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-05-23.
How severe is CVE-2023-23300?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-23300 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.