CVE-2020-1054
Microsoft Win32k: Privilege Escalation
As of , CVE-2020-1054 in Microsoft Win32k is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 3 November 2021
- US federal deadline
- 3 May 2022181 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Not known to CISA
- EPSS score
- 0.54Higher than 98% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- Not availableCISA listed it before 4 February 2022, where the EPSS files we read begin.
- Public exploit
- 1 Metasploit module
- Fix
- No vendor link in CISA's entry
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
Microsoft Win32k contains a privilege escalation vulnerability when the Windows kernel-mode driver fails to properly handle objects in memory. Successful exploitation allows an attacker to execute code in kernel mode.
CISA's description
An elevation of privilege vulnerability exists in Windows when the Windows kernel-mode driver fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The update addresses this vulnerability by correcting how the Windows kernel-mode driver handles objects in memory.
The CVE record's description, from microsoft
- CVE published
- 21 May 2020
- Assigned by
- microsoft
- CVSS
- 7.0 High (CVSS 3.1, from the CNA)
- CWE-787
- Out-of-bounds Write
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- no
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
Public exploits
Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.
- Metasploit: Microsoft Windows DrawIconEx OOB Write Local Privilege Elevationexploit module, rank normal
Win32k: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2014-4113Privilege Escalation | Microsoft Win32k | Patch this weekMetasploit module; EPSS 0.87; verified Exploit-DB entry | 0.87 | ||
| CVE-2018-8120Privilege Escalation | Microsoft Win32k | Patch this weekRansomware use; Metasploit module; EPSS 0.73; verified Exploit-DB entry | 0.73 | ||
| CVE-2015-1701Privilege Escalation | Microsoft Win32k | Patch this weekRansomware use; Metasploit module; EPSS 0.56; verified Exploit-DB entry | 0.56 | ||
| CVE-2018-8453Privilege Escalation | Microsoft Win32k | Patch this weekRansomware use; Metasploit module; EPSS 0.70; verified Exploit-DB entry | 0.70 | ||
| CVE-2013-3660Privilege Escalation | Microsoft Win32k | Patch this weekMetasploit module; verified Exploit-DB entry | 0.39 | ||
| CVE-2022-21882Privilege Escalation | Microsoft Win32k | Patch this weekRansomware use; Metasploit module; EPSS 0.59 | 0.59 | ||
| CVE-2019-1458Privilege Escalation | Microsoft Win32k | Patch this weekRansomware use; Metasploit module; EPSS 0.74 | 0.74 | ||
| CVE-2021-1732Privilege Escalation | Microsoft Win32k | Patch this weekRansomware use; Metasploit module; EPSS 0.78 | 0.78 | ||
| CVE-2019-0808Privilege Escalation | Microsoft Win32k | Patch this weekMetasploit module; EPSS 0.53 | 0.53 | ||
| CVE-2016-7255Privilege Escalation | Microsoft Win32k | Patch this weekRansomware use; EPSS 0.81 | 0.81 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org