Microsoft Lync Server 2013 vulnerabilities
5 vulnerabilities
Known vulnerabilities in Microsoft Lync Server 2013, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
CVE-2021-24099microsoftlync_server+4
EPSS score3.20%
Skype for Business and Lync Denial of Service VulnerabilityCVE-2021-24073microsoftlync_server+3EPSS score1.80%
Skype for Business and Lync Spoofing VulnerabilityCVE-2020-1025microsoftlync+10EPSS score5.85%
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.CVE-2019-1029microsoftlync_server+2EPSS score5.28%
A denial of service vulnerability exists in Skype for Business. An attacker who successfully exploited the vulnerability could cause Skype for Business to stop responding. Note that the denial of service would not allow an attacker to execute code or to elevate the attacker's user rights.
To exploit the vulnerability, an attacker needs to obtain a dial-in link for a vulnerable server and then initiates a series of calls within a short amount of time.
The update addresses the vulnerability by correcting the way that Skype for Business server handles objects in memory.CVE-2019-0798microsoftlync_server+3EPSS score2.08%
A spoofing vulnerability exists when a Lync Server or Skype for Business Server does not properly sanitize a specially crafted request, aka 'Skype for Business and Lync Spoofing Vulnerability'.