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CVE-2018-6856

UnknownEPSS 0.61%

Last modified

CVE-2018-6856 is a vulnerability of currently unknown severity. Sophos SafeGuard Enterprise before 8.00.5, SafeGuard Easy before 7.00.3, and SafeGuard LAN Crypt before 3.95.2 are vulnerable to Local Privilege Escalation via IOCTL 0x8020601C. By crafting an input buffer we can control the execution path to the point where a global variable will be written to a user controlled address. EPSS estimates a 0.61% chance of exploitation in the next 30 days.

Description

Sophos SafeGuard Enterprise before 8.00.5, SafeGuard Easy before 7.00.3, and SafeGuard LAN Crypt before 3.95.2 are vulnerable to Local Privilege Escalation via IOCTL 0x8020601C. By crafting an input buffer we can control the execution path to the point where a global variable will be written to a user controlled address. We can take advantage of this condition to zero-out the pointer to the security descriptor in the object header of a privileged process or modify the security descriptor itself and run code in the context of a process running as SYSTEM.

Metrics

EPSS Probability
0.61%

44.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
SophosSafeguard Easy Device Encryption Client6.00—
SophosSafeguard Easy Device Encryption Client6.10—
SophosSafeguard Easy Device Encryption Client7.00—
SophosSafeguard Enterprise Client5.60.3Vs-Nfd
SophosSafeguard Enterprise Client6.00—
SophosSafeguard Enterprise Client6.00.1—
SophosSafeguard Enterprise Client6.10—
SophosSafeguard Enterprise Client7.00—
SophosSafeguard Enterprise Client8.00—
SophosSafeguard Lan Crypt Client3.90.1Ts
SophosSafeguard Lan Crypt Client3.90.2—
SophosSafeguard Lan Crypt Client3.95.1—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-6856?
Sophos SafeGuard Enterprise before 8.00.5, SafeGuard Easy before 7.00.3, and SafeGuard LAN Crypt before 3.95.2 are vulnerable to Local Privilege Escalation via IOCTL 0x8020601C. By crafting an input buffer we can control the execution path to the point where a global variable will be written to a user controlled address. We can take advantage of this condition to zero-out the pointer to the security descriptor in the object header of a privileged process or modify the security descriptor itself and run code in the context of a process running as SYSTEM.
How severe is CVE-2018-6856?
Severity scoring for CVE-2018-6856 is pending analysis. The EPSS model estimates a 0.61% probability of exploitation in the next 30 days.
How do I fix CVE-2018-6856?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-6856?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST