CVE-2018-8598
published 2018-12-12CVE-2018-8598: An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory, aka "Microsoft Excel Information…
PriorityP273medium4.7CVSS 3.0
AVLACHPRNUIRSUCHINAN
ITWVulnCheck KEV
Exploited in the wild
EPSS
6.22%
92.7th percentile
An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory, aka "Microsoft Excel Information Disclosure Vulnerability." This affects Office 365 ProPlus, Microsoft Office, Microsoft Excel. This CVE ID is unique from CVE-2018-8627.
Affected
34 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | excel | — | — |
| microsoft | excel | — | — |
| microsoft | excel | — | — |
| microsoft | excel | — | — |
| microsoft | excel_viewer | — | — |
| microsoft | microsoft_excel | — | — |
| microsoft | microsoft_excel | — | — |
| microsoft | microsoft_excel | — | — |
| microsoft | microsoft_excel | — | — |
| microsoft | microsoft_excel | — | — |
| microsoft | microsoft_excel | — | — |
| microsoft | microsoft_excel | — | — |
| microsoft | microsoft_excel_viewer | — | — |
| microsoft | microsoft_office | — | — |
| microsoft | microsoft_office | — | — |
| microsoft | microsoft_office | — | — |
| microsoft | microsoft_office | — | — |
| microsoft | microsoft_office | — | — |
| microsoft | microsoft_office | — | — |
| microsoft | microsoft_office | — | — |
| microsoft | office | — | — |
| microsoft | office | — | — |
| microsoft | office | — | — |
| microsoft | office | — | — |
| microsoft | office | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Vulnerability is triggered by opening a specially crafted document file in Microsoft Excel; detection should focus on suspicious Office document opens followed by anomalous memory access patterns. ↗
- →The vulnerability results in disclosure of uninitialized memory contents from Excel; monitor for Excel processes exhibiting out-of-bounds or uninitialized memory reads. ↗
- →Exploitation requires the attacker to know the memory address where the object was created, suggesting a two-stage attack; look for follow-on exploitation attempts after an Excel document is opened. ↗
- ·CVE-2018-8598 is distinct from CVE-2018-8627, which is a related but separate Microsoft Excel information disclosure vulnerability; ensure detections and patches target the correct CVE. ↗
- ·As of the advisory, this vulnerability had NOT been publicly disclosed or exploited in the wild, reducing immediate urgency but not eliminating risk. ↗
- ·The fix changes how certain Excel functions handle objects in memory; unpatched Excel installations remain vulnerable to information disclosure via malicious documents. ↗
CVSS provenance
nvdv3.04.7MEDIUMCVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
nvdv2.02.6LOWAV:N/AC:H/Au:N/C:P/I:N/A:N
vulncheck4.7MEDIUM
vendor_msrc4.7HIGH
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GHSA
GHSA-643h-w2r6-x59x: An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory, aka "Microsoft Excel Information
ghsa_unreviewed·2022-05-13·CVSS 5.5
CVE-2018-8598 [MEDIUM] GHSA-643h-w2r6-x59x: An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory, aka "Microsoft Excel Information
An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory, aka "Microsoft Excel Information Disclosure Vulnerability." This affects Office 365 ProPlus, Microsoft Office, Microsoft Excel. This CVE ID is unique from CVE-2018-8627.
GHSA
GHSA-jq29-w2g2-mrm3: An information disclosure vulnerability exists when Microsoft Excel software reads out of bound memory due to an uninitialized variable, which could d
ghsa_unreviewed·2022-05-13·CVSS 4.7
CVE-2018-8627 [MEDIUM] CWE-908 GHSA-jq29-w2g2-mrm3: An information disclosure vulnerability exists when Microsoft Excel software reads out of bound memory due to an uninitialized variable, which could d
An information disclosure vulnerability exists when Microsoft Excel software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory, aka "Microsoft Excel Information Disclosure Vulnerability." This affects Microsoft Office, Office 365 ProPlus, Microsoft Excel, Microsoft Excel Viewer, Excel. This CVE ID is unique from CVE-2018-8598.
VulnCheck
Microsoft Excel Use of Uninitialized Resource
vulncheck·2018·CVSS 4.7
CVE-2018-8627 [MEDIUM] Microsoft Excel Use of Uninitialized Resource
Microsoft Excel Use of Uninitialized Resource
An information disclosure vulnerability exists when Microsoft Excel software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory, aka "Microsoft Excel Information Disclosure Vulnerability." This affects Microsoft Office, Office 365 ProPlus, Microsoft Excel, Microsoft Excel Viewer, Excel. This CVE ID is unique from CVE-2018-8598.
Affected: Microsoft Excel
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Exploitation References: https://www.tenable.com/blog/daisy-chaining-how-vulnerabilities-can-be-greater-than-the-sum-of-their-parts
VulnCheck
Microsoft Excel Information Disclosure Vulnerability
vulncheck·2018·CVSS 4.7
CVE-2018-8598 [MEDIUM] Microsoft Excel Information Disclosure Vulnerability
Microsoft Excel Information Disclosure Vulnerability
An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory, aka "Microsoft Excel Information Disclosure Vulnerability." This affects Office 365 ProPlus, Microsoft Office, Microsoft Excel. This CVE ID is unique from CVE-2018-8627.
Affected: Microsoft Excel
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Exploitation References: https://www.tenable.com/blog/daisy-chaining-how-vulnerabilities-can-be-greater-than-the-sum-of-their-parts
Microsoft
Microsoft Excel Information Disclosure Vulnerability
vendor_msrc·2018-12-11·CVSS 4.7
CVE-2018-8598 [MEDIUM] Microsoft Excel Information Disclosure Vulnerability
Microsoft Excel Information Disclosure Vulnerability
Description: An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory. An attacker who exploited the vulnerability could use the information to compromise the user’s computer or data.
To exploit the vulnerability, an attacker could craft a special document file and then convince the user to open it. An attacker must know the memory address location where the object was created.
The update addresses the vulnerability by changing the way certain Excel functions handle objects in memory.
FAQ: What type of information could be disclosed by this vulnerability?
The type of information that could be disclosed if an attacker successfully exploited this vulnerability is uninitialized me
No detection rules found.
No public exploits indexed.
2018-12-12
Published
Exploited in the wild