CVE-2011-2005
Microsoft Ancillary Function Driver (afd.sys): Improper Input Validation
As of , CVE-2011-2005 in Microsoft Ancillary Function Driver (afd.sys) 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 28 March 2022
- US federal deadline
- 18 April 202221 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Not known to CISA
- EPSS score
- 0.32Higher than 98% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- 0.04 on 28 March 2022EPSS on the day CISA listed it.
- Public exploit
- 1 Metasploit module and 2 Exploit-DB entries (2 verified)
- 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
afd.sys in the Ancillary Function Driver in Microsoft Windows does not properly validate user-mode input passed to kernel mode, which allows local users to gain privileges via a crafted application.
CISA's description
afd.sys in the Ancillary Function Driver in Microsoft Windows XP SP2 and SP3 and Server 2003 SP2 does not properly validate user-mode input passed to kernel mode, which allows local users to gain privileges via a crafted application, aka "Ancillary Function Driver Elevation of Privilege Vulnerability."
The CVE record's description, from microsoft
- CVE published
- 12 October 2011
- Assigned by
- microsoft
- CVSS
- 7.8 High (CVSS 3.1, from CISA-ADP)
- CWE-264
- Permissions, Privileges, and Access Controls
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- no
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- Exploit-DB published an exploit (EDB-ID 18176).
- Exploit-DB published an exploit (EDB-ID 21844).
- 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: MS11-080 AfdJoinLeaf Privilege Escalationexploit module, rank average
- Exploit-DB: Microsoft Windows - 'AfdJoinLeaf' Local Privilege Escalation (MS11-080) (Metasploit)EDB-ID 21844, verified by Exploit-DB, 10 October 2012
- Exploit-DB: Microsoft Windows XP/2003 - 'afd.sys' Local Privilege Escalation (MS11-080)EDB-ID 18176, verified by Exploit-DB, 30 November 2011
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org