Buffer overflow in Microsoft Exchange Server
CVE-2017-8538
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-2017-8540 and CVE-2017-8541.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.500 (98.9th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 98.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.500 · newest: 0.500 · change: 0.000
Affected products
- Microsoft Exchange Server — versions 2013, 2016
- Microsoft Forefront Security
- Microsoft Malware Protection Engine
- Microsoft Windows 10 — versions 1511, 1607, 1703
- Microsoft Windows 7
- Microsoft Windows 8.1
- Microsoft Windows Defender
- Microsoft Windows Rt 8.1
- Microsoft Windows Server 2008 — versions r2
- Microsoft Windows Server 2012 — versions r2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.exploit-db.com/exploits/42081/ (exploit)
- www.securityfocus.com/bid/98706 (VDB Entry, Third Party Advisory, vdb-entry)
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8538 (Vendor Advisory)
- www.securitytracker.com/id/1038571 (vdb-entry)
Frequently asked questions
- What is CVE-2017-8538?
- CVE-2017-8538 is a high-severity vulnerability in Microsoft Exchange Server, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2017-05-26.
- How severe is CVE-2017-8538?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2017-8538 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.