Vulnerability Name:

CVE-2021-24073 (CCN-195598)

Assigned:2021-02-09
Published:2021-02-09
Updated:2021-03-02
Summary:Skype for Business and Lync Spoofing Vulnerability
CVSS v3 Severity:7.1 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N)
6.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): Low
Availibility (A): None
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): High
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:5.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
5.6 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:S/C:C/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-24073

Source: XF
Type: UNKNOWN
ms-skype-cve202124073-spoofing(195598)

Source: CCN
Type: Microsoft Security TechCenter - February 2021
Skype for Business and Lync Spoofing Vulnerability

Source: N/A
Type: Patch, Vendor Advisory
N/A

Vulnerable Configuration:Configuration 1:
  • cpe:/a:microsoft:lync_server:2013:*:*:*:*:*:*:*
  • OR cpe:/a:microsoft:skype_for_business_server:2015:cu8:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:microsoft:lync_basic:2013:sp1:*:*:*:*:x32:*
  • OR cpe:/a:microsoft:lync:2013:sp1:~~~~x64~:*:*:*:*:*
  • OR cpe:/a:microsoft:lync_basic:2013:sp1:~~~~x64~:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    microsoft lync server 2013
    microsoft skype for business server 2015 cu8
    microsoft lync basic 2013 sp1
    microsoft lync 2013 sp1
    microsoft lync basic 2013 sp1