Microsoft Lync 2011 on Mac Security Feature Messages input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Microsoft Lync 2011 on Mac. This vulnerability affects unknown code of the component Security Feature. The manipulation as part of Messages leads to input validation. This vulnerability is referenced as CVE-2018-8474. Remote exploitation of the attack is possible. Furthermore, an exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Microsoft Lync 2011 on Mac (Unified Communication Software). This issue affects an unknown code of the component Security Feature. The manipulation as part of a Messages leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A security feature bypass vulnerability exists when Lync for Mac 2011 fails to properly sanitize specially crafted messages, aka "Lync for Mac 2011 Security Feature Bypass Vulnerability." This affects Microsoft Lync.

The bug was discovered 09/11/2018. The weakness was published 09/11/2018 by Paul 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. The identification of this vulnerability is CVE-2018-8474 since 03/13/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. The advisory points out:

A security feature bypass vulnerability exists when Lync for Mac 2011 fails to properly sanitize specially crafted messages. An attacker who successfully exploited this vulnerability could cause a targeted Lync for Mac 2011 user's system to browse to an attacker-specified website or automatically download file types on the operating system's safe file type list.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 117409 (Security Update for Microsoft Office (September 2018) (macOS)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks 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 Exploit-DB (45936), Tenable (117409) and SecurityFocus (BID 105268†). Similar entries are available at VDB-123828, VDB-123844, VDB-123846 and VDB-123859. 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: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 117409
Nessus Name: Security Update for Microsoft Office (September 2018) (macOS)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

03/13/2018 🔍
09/11/2018 +181 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 🔍
09/13/2018 +1 days 🔍
07/03/2024 +2120 days 🔍

Sourcesinfo

Vendor: microsoft.com

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

CVE: CVE-2018-8474 (🔍)
GCVE (CVE): GCVE-0-2018-8474
GCVE (VulDB): GCVE-100-123995
SecurityFocus: 105268 - Microsoft Lync for Mac CVE-2018-8474 Security Bypass Vulnerability
SecurityTracker: 1041633

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 09/13/2018 14:07
Updated: 07/03/2024 12:36
Changes: 09/13/2018 14:07 (80), 03/23/2020 15:05 (8), 05/16/2023 09:37 (4), 07/03/2024 12:36 (14)
Complete: 🔍
Cache ID: 216::103

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