What is CVE-2018-3971?

CVE-2018-3971 is a high-severity vulnerability in Sophos Hitmanpro.alert, classified under Write-what-where Condition. CVSS score: 7.8/10. Published 2018-10-25.

How severe is CVE-2018-3971?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2018-3971 known to be exploited?

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

Vulnerability in Sophos Hitmanpro.alert

CVE-2018-3971

An exploitable arbitrary write vulnerability exists in the 0x2222CC IOCTL handler functionality of Sophos HitmanPro.Alert 3.7.6.744. A specially crafted IRP request can cause the driver to write data under controlled by an attacker address, resulting in memory corruption. An attacker can send IRP request to trigger this vulnerability.

EPSS: 0.005 (42.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Sophos Hitmanpro.alert — versions 3.7.6.744
Talos Sophos — versions Sophos HitmanPro.Alert - hmpalert.sys 3.7.6.744 - Windows 7 x86

Weakness classification (CWE)

CWE-123 — Write-what-where Condition

Public proof-of-concept exploits

References

talos-cna@cisco.com (VDB Entry, Third Party Advisory, vdb-entry, Broken Link, x_refsource_BID)
talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2018-3971?: CVE-2018-3971 is a high-severity vulnerability in Sophos Hitmanpro.alert, classified under Write-what-where Condition. CVSS score: 7.8/10. Published 2018-10-25.
How severe is CVE-2018-3971?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2018-3971 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.