by Kastro
Paper/Archive/CVE-2020-1025

CVE-2020-1025

Microsoft Skype for Business Server 2019 CU2 — Microsoft Office Elevation of Privilege Vulnerability

EPSS 6%CVSS 9.8
critical.is priorityof 100
48
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 93.2.932 × 2018.6No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

An elevation of privilege vulnerability exists when Microsoft SharePoint Server and Skype for Business Server improperly handle OAuth token validation. An attacker who successfully exploited the vulnerability could bypass authentication and achieve improper access. To exploit this vulnerability, an attacker would need to modify the token. The update addresses the vulnerability by modifying how Microsoft SharePoint Server and Skype for Business Server validate tokens.

Affected

ProductAffectedFixed inSource
Skype for Business Server 2019 CU27.0.0 – < publicationpublicationCNA
Skype for Business Server 2015 CU 82015 CU 8 – < publicationpublicationCNA
Microsoft Lync Server 2013< publicationpublicationCNA
Microsoft SharePoint Enterprise Server 201616.0.0 – < publicationpublicationCNA
Microsoft SharePoint Server 201916.0.0 – < publicationpublicationCNA
Microsoft SharePoint Foundation 2013 Service Pack 115.0.0 – < publicationpublicationCNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refportal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1025