CVE-2025-70085: Opensatkit buffer overflow (CVSS 9.8)

Description

An issue was discovered in OpenSatKit 2.2.1. The EventErrStr buffer has a fixed size of 256 bytes. The code uses sprintf to format two filenames (Source1Filename and the string returned by FileUtil_FileStateStr) into this buffer without any length checking and without using bounded format specifiers such as %.*s. If the filename length approaches OS_MAX_PATH_LEN (commonly 64-256 bytes), the combined formatted string together with constant text can exceed 256 bytes, resulting in a stack buffer overflow. Such unsafe sprintf calls are scattered across multiple functions in file.c, including FILE_ConcatenateCmd() and ConcatenateFiles(), all of which fail to validate the output length.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Opensatkit2.2.1

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

https://gist.github.com/jonafk555Third Party Advisory
https://github.com/OpenSatKit/OpenSatKitProduct
https://github.com/OpenSatKit/OpenSatKit/releases/tag/v2.2.1Release Notes
https://raw.githubusercontent.com/OpenSatKit/OpenSatKit/master/cfs/apps/filemgr/fsw/src/file.cThird Party Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-70085 being actively exploited?

CVE-2025-70085 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.62%.

How severe is CVE-2025-70085?

CVE-2025-70085 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.62% probability of exploitation.

Which products are affected by CVE-2025-70085?

Affected products include Opensatkit.

How do I fix CVE-2025-70085?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-70085 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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