Actively exploited · Published May 26, 2017 · Assigned by microsoft
CVE-2017-8540
High 7.8 Exploited
In plain English
A high-severity out-of-bounds write in Malware Protection Engine from Microsoft Corporation. Attackers are actively exploiting it in the wild (listed by CISA on March 3, 2022). The chance it is exploited in the next 30 days is estimated at 71.9% (higher than 99.4% of all known vulnerabilities). Apply updates per vendor instructions.
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Mar 24, 2022.
Official description
The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to memory corruption. aka "Microsoft Malware Protection Engine Remote Code Execution Vulnerability", a different vulnerability than CVE-2017-8538 and CVE-2017-8541.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft Corporation | Malware Protection Engine | Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016. |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8540 x_refsource_CONFIRM
- 98703 vdb-entry, x_refsource_BID
- 42088 exploit, x_refsource_EXPLOIT-DB
- 1038571 vdb-entry, x_refsource_SECTRACK
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-8540 government-resource