CVE-2017-12840
7.8 · HIGHOverview
CVE-2017-12840 is a high-severity vulnerability affecting deslock deslock\+. It was published on August 28, 2017 and has a CVSS 3.0 base score of 7.8 (HIGH).
This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from deslock. Update deslock\+ to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| deslock | deslock\+ | 0 | Affected |
Frequently Asked Questions
What is CVE-2017-12840?
CVE-2017-12840 is a high-severity vulnerability affecting deslock deslock\+. It was published on August 28, 2017 and has a CVSS 3.0 base score of 7.8 (HIGH).
How severe is CVE-2017-12840?
This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2017-12840?
Check the references section for vendor advisories and patches from deslock. Update deslock\+ to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2017-12840?
CyberStrike's AI-powered security agents can automatically detect CVE-2017-12840 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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