Login Request a demo
Medium severity · published Jul 18, 2019
CVE-2019-11230
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
4.4
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AN
Antivirus · Avast
before 19.4 · source: NVD
Affected product
AN
Antivirus
Avast
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-11230
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-11230
Exploit
http://www.mcerlane.co.uk/CVE-2019-11230/
Third Party Advisory
http://www.securityfocus.com/bid/109344
More from Antivirus
9.8
CVE-2025-3500
Integer Overflow in Avast Antiviurs 25.1.981.6 on Windows may result in privilege escalation
9.8
CVE-2020-10867
An issue was discovered in Avast Antivirus before 20
9.8
CVE-2017-8307
In Avast Antivirus before v17, using the LPC interface API exposed by the AvastSVC.exe Windows service, it is possible to launch predefined binaries, or replace or delete…
8.8
CVE-2021-45337
Privilege escalation vulnerability in the Self-Defense driver of Avast Antivirus prior to 20.8 allows a local user with SYSTEM privileges to gain elevated privileges by…
8.8
CVE-2021-45336
Privilege escalation vulnerability in the Sandbox component of Avast Antivirus prior to 20.4 allows a local sandboxed code to gain elevated privileges by using system IPC…