Privilege escalation in Windows Installer
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-0683 CVE-2020-0686 |
| CWE-ID | CWE-59 |
| Exploitation vector | Local |
| Public exploit | Vulnerability #1 is being exploited in the wild. |
| Vulnerable software Subscribe |
Windows Operating systems & Components / Operating system Windows Server Operating systems & Components / Operating system |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Link following
EUVDB-ID: #VU25235
Risk: Low
CVSSv3.1: 8.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID: CVE-2020-0683
CWE-ID:
CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to elevate privileges on the system.
The vulnerability exists within the Windows Installer when MSI packages process symbolic links. A local user can bypass access restrictions to add or remove files and escalate privileges on the system.
Install updates from vendor's website.
Vulnerable software versionsWindows: 7 - 10 1909
Windows Server: 2008 - 2019 1909
CPE2.3
- cpe:2.3:o:microsoft:windows:10:1803:*:*:*:*:*:*
- Full software list in CPE2.3 format available after registration.
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0683
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
2) Link following
EUVDB-ID: #VU25237
Risk: Low
CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-0686
CWE-ID:
CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Exploit availability: No
DescriptionThe vulnerability allows a local user to elevate privileges on the system.
The vulnerability exists within the Windows Installer when MSI packages process symbolic links. A local user can bypass access restrictions to add or remove files and escalate privileges on the system. MitigationInstall updates from vendor's website.
Vulnerable software versionsWindows: 7 - 10 1909
Windows Server: 2008 - 2019 1909
CPE2.3
- cpe:2.3:o:microsoft:windows:10:1803:*:*:*:*:*:*
- Full software list in CPE2.3 format available after registration.
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0686
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
