A kernel driver, namely DLMFENC.sys, bundled with the DESLock+ client application 4.8.16…
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
A kernel driver, namely DLMFENC.sys, bundled with the DESLock+ client application 4.8.16 and earlier contains a locally exploitable heap based buffer overflow in the handling of an IOCTL message of type 0x0FA4204. The vulnerability is present due to the kernel driver failing to allocate sufficient memory on the kernel heap to contain a user supplied string as such the string is copied into a buffer of constant size (0x1000-bytes) and thus an overflow condition results. Access to the kernel driver is permitted through an obfuscated interface whereby bytes of user supplied message are "authenticated" via an obfuscation routine employing a linear equation.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-12840
- 2026-10-03 Alias added: GHSA-mg9q-jqwm-6q5m
References
More Deslock+ vulnerabilities
- TI-2009-04588 The dlpcrypt.sys kernel driver 0.1.1.27 in DESlock+ 4.0.2 allows local users to gain… CVSS 2.0HIGH 7.2
Sources
- CVE-2017-12840 · CVE Program
- CVE-2017-12840 · NVD
- FIRST EPSS
- GHSA-mg9q-jqwm-6q5m · GitHub Advisory Database · CC BY 4.0
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