Improper input validation in Avast Antivirus Home
CVE-2009-3523
aavmKer4.sys in avast! Home and Professional for Windows before 4.8.1356 does not properly validate input to IOCTLs (1) 0xb2d6000c and (2) 0xb2d60034, which allows local users to gain privileges via IOCTL requests using crafted kernel addresses that trigger memory corruption, a different vulnerability than CVE-2008-1625.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v2 metric
CVSS v2 base score 6.9 (Medium). Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.008 (55.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Avast Antivirus Home — versions 4.7.827, 4.7.844, 4.7.869
- Avast Antivirus Professional — versions 4.7.827, 4.7.844, 4.7.1043
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.ntinternals.org/ntiadv0904/ntiadv0904.html (Exploit)
- oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:6024 (signature, vdb-entry)
- secunia.com/advisories/36858 (Vendor Advisory, third-party-advisory)
- www.avast.com/eng/avast-4-home_pro-revision-history.html
Frequently asked questions
- What is CVE-2009-3523?
- CVE-2009-3523 is a vulnerability in Avast Antivirus Home, classified under Improper Input Validation. Published 2009-10-01.
- Is CVE-2009-3523 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.