CVE-2023-28229

Microsoft Windows CNG Key Isolation Service: Privilege Escalation

As of , CVE-2023-28229 in Microsoft Windows CNG Key Isolation Service is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.

Exploited
Yes: CISA listed it on 4 October 2023
US federal deadline
25 October 202321 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.02Higher than 76% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
0.00 on 4 October 2023EPSS on the day CISA listed it.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
Vendor advice: msrc.microsoft.comLinks below, from CISA's entry.

What CISA says to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA's required action

What the flaw is

Microsoft Windows Cryptographic Next Generation (CNG) Key Isolation Service contains an unspecified vulnerability that allows an attacker to gain specific limited SYSTEM privileges.

CISA's description

Windows CNG Key Isolation Service Elevation of Privilege Vulnerability

The CVE record's description, from microsoft

CVE published
11 April 2023
Assigned by
microsoft
CVSS
7.0 High (CVSS 3.1, from the CNA)
CWE-591
Sensitive Data Storage in Improperly Locked Memory
CISA SSVC, exploitation
active
CISA SSVC, automatable
no
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

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