CVE-2021-33779
published 2021-07-14CVE-2021-33779: Windows AD FS Security Feature Bypass Vulnerability
PriorityP337medium6.5CVSS 3.1
AVNACLPRHUINSUCHIHAN
EPSS
2.23%
80.8th percentile
Windows AD FS Security Feature Bypass Vulnerability
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_server_2016 | — | — |
| microsoft | windows_server_2016 | — | — |
| microsoft | windows_server_2016 | >= 10.0.0 < 10.0.14393.4530 | 10.0.14393.4530 |
| microsoft | windows_server_2019 | >= 10.0.0 < 10.0.17763.2061 | 10.0.17763.2061 |
| microsoft | windows_server_version_2004 | >= 10.0.0 < 10.0.19041.1110 | 10.0.19041.1110 |
| microsoft | windows_server_version_20h2 | >= 10.0.0 < 10.0.19042.1110 | 10.0.19042.1110 |
| msrc | windows_server_2016 | — | — |
| msrc | windows_server_2019 | — | — |
| msrc | windows_server_version_2004 | — | — |
| msrc | windows_server_version_20h2 | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
nvdv2.05.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:N
vendor_msrc8.1HIGH
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GHSA
GHSA-jgpr-7x8j-xjhf: Windows ADFS Security Feature Bypass Vulnerability
ghsa_unreviewed·2022-05-24
CVE-2021-33779 [MEDIUM] GHSA-jgpr-7x8j-xjhf: Windows ADFS Security Feature Bypass Vulnerability
Windows ADFS Security Feature Bypass Vulnerability
Microsoft
Windows AD FS Security Feature Bypass Vulnerability
vendor_msrc·2021-07-13·CVSS 8.1
CVE-2021-33779 [HIGH] Windows AD FS Security Feature Bypass Vulnerability
Windows AD FS Security Feature Bypass Vulnerability
FAQ: What kind of security feature could be bypassed by successfully exploiting this vulnerability?
This vulnerability relates to Primary Refresh Tokens which are usually stored in TPM. These tokens are usually used for SSO for Azure AD accounts. The tokens are not encrypted in a strong enough manner, and an administrator with access to a vulnerable system could extract and potentially decrypt the token for reuse until the token expires or is renewed.
Active Directory Federation Services: Active Directory Federation Services
Microsoft: Microsoft
Impact: Security Feature Bypass
Exploit Status: Publicly Disclosed:Yes;Exploited:No;Latest Software Release:Exploitation Less Likely;Older Software Release:Exploitation Less Likely;DOS:N/A
R
No detection rules found.
No public exploits indexed.
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2021-07-14
Published