Microsoft Outlook 2010 SP2/2013 RT SP1/2013 SP1/2016 Attachment input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Microsoft Outlook 2010 SP2/2013 RT SP1/2013 SP1/2016. This issue affects some unknown processing of the component Attachment Handler. Performing a manipulation results in input validation. This vulnerability is known as CVE-2018-8244. Remote exploitation of the attack is possible. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft Outlook 2010 SP2/2013 RT SP1/2013 SP1/2016 (Groupware Software). This affects some unknown processing of the component Attachment Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An elevation of privilege vulnerability exists when Microsoft Outlook does not validate attachment headers properly, aka "Microsoft Outlook Elevation of Privilege Vulnerability." This affects Microsoft Office, Microsoft Outlook.

The bug was discovered 06/12/2018. The weakness was published 06/12/2018 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release has been coordinated with Microsoft. This vulnerability is uniquely identified as CVE-2018-8244 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. The technical details are unknown and an exploit is not publicly available. The advisory points out:

An elevation of privilege vulnerability exists when Microsoft Outlook does not validate attachment headers properly. An attacker who successfully exploited the vulnerability could send an email with hidden attachments that would be opened or executed once a victim clicks a link within the email. Note that this does not bypass attachment filters, so blocked attachments will still be excluded.

The vulnerability scanner Nessus provides a plugin with the ID 110499 (Security Updates for Outlook (June 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 110319 (Microsoft Office and Microsoft Office Services and Web Apps Security Update June 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 (110499) and SecurityFocus (BID 104323†). Similar entries are available at VDB-119476, VDB-119477, VDB-119478 and VDB-119479. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 110499
Nessus Name: Security Updates for Outlook (June 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 🔍
06/12/2018 +90 days 🔍
06/12/2018 +0 days 🔍
06/12/2018 +0 days 🔍
06/12/2018 +0 days 🔍
06/12/2018 +0 days 🔍
06/13/2018 +1 days 🔍
06/14/2018 +0 days 🔍
03/27/2023 +1747 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2018-8244 (🔍)
GCVE (CVE): GCVE-0-2018-8244
GCVE (VulDB): GCVE-100-119475
SecurityFocus: 104323 - Microsoft Outlook CVE-2018-8244 Remote Privilege Escalation Vulnerability
SecurityTracker: 1041107

See also: 🔍

Entryinfo

Created: 06/13/2018 18:53
Updated: 03/27/2023 08:54
Changes: 06/13/2018 18:53 (76), 02/18/2020 21:53 (5), 03/27/2023 08:54 (4)
Complete: 🔍
Cache ID: 216::103

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