Microsoft Excel up to 2016 C2R information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in Microsoft Excel 2010 SP2/2013 RT SP1/2013 SP1/2016/2016 C2R and classified as problematic. Affected by this issue is some unknown functionality. Performing a manipulation results in information disclosure. This vulnerability is identified as CVE-2018-8429. The attack is only possible with local access. There is not any exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Microsoft Excel 2010 SP2/2013 RT SP1/2013 SP1/2016/2016 C2R (Spreadsheet Software). This affects an unknown part. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory, aka "Microsoft Excel Information Disclosure Vulnerability." This affects Microsoft Excel Viewer, Microsoft Office, Microsoft Excel.

The bug was discovered 09/11/2018. The weakness was released 09/11/2018 with Jaanus Kp Clarified Security as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. The public release was coordinated with Microsoft. This vulnerability is uniquely identified as CVE-2018-8429 since 03/14/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue. The advisory points out:

An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory. An attacker who exploited the vulnerability could access information previously deleted from the active worksheet.

The vulnerability scanner Nessus provides a plugin with the ID 117421 (Security Updates for Microsoft Excel Products (September 2018)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 110323 (Microsoft Office and Microsoft Office Services and Web Apps Security Update September 2018).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (117421) and SecurityFocus (BID 105219†). Entries connected to this vulnerability are available at VDB-123828, VDB-123844, VDB-123846 and VDB-123859. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 117421
Nessus Name: Security Updates for Microsoft Excel Products (September 2018)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

03/14/2018 🔍
09/11/2018 +180 days 🔍
09/11/2018 +0 days 🔍
09/11/2018 +0 days 🔍
09/11/2018 +0 days 🔍
09/11/2018 +0 days 🔍
09/12/2018 +0 days 🔍
09/12/2018 +0 days 🔍
05/08/2023 +1699 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Organization: Jaanus Kp Clarified Security
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2018-8429 (🔍)
GCVE (CVE): GCVE-0-2018-8429
GCVE (VulDB): GCVE-100-123861

OVAL: 🔍

SecurityFocus: 105219 - Microsoft Excel CVE-2018-8429 Information Disclosure Vulnerability
SecurityTracker: 1041630

See also: 🔍

Entryinfo

Created: 09/12/2018 08:24
Updated: 05/08/2023 12:33
Changes: 09/12/2018 08:24 (76), 03/22/2020 15:46 (6), 05/08/2023 12:33 (4)
Complete: 🔍
Cache ID: 216::103

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