Home/CVE/In Avast Antivirus before 19.4, a local administrator can trick the product into renaming arbitrary files by replacing t
CVE

CVE-2019-11230

In Avast Antivirus before 19.4, a local administrator can trick the product into renaming arbitrary files by replacing t

In Avast Antivirus before 19.4, a local administrator can trick the product into renaming arbitrary files by replacing the Logs\Update.log file with a symlink. The next time the product attempts to write to the log file, the target of the symlink is renamed. This defect can be exploited to rename a critical product file (e.g., AvastSvc.exe), causing the product to fail to start on the next system restart.

MEDIUM · CVSS 4.4 EPSS 0.00082
Schedule remediation
  • Public exploit or PoC is available
Sigma rules8 YARA rules0
⬡

Weakness Classification

CWE-59Improper Link Resolution Before File Access ('Link Following')
▤

Affected Products & Versions

1
avast antivirus< 19.4
⚠

Public Exploits & PoCs

1
pocwww.mcerlane.co.uk · CVE-2019-11230www.mcerlane.co.uk
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productcriticalAntivirus Exploitation Framework Detection
productcriticalAntivirus Password Dumper Detection
productcriticalAntivirus Ransomware Detection
producthighAntivirus Web Shell Detection
producthighAntivirus Relevant File Paths Alerts
producthighAntivirus Hacktool Detection
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Scoring & Timeline

4.4
MEDIUM · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD18 Jul 2019 · 05:15 PM
CVSS VectorCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/109344Third Party Advisory
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