ZDI-21-208: Avast Premium Security AvastSvc Directory Junction Denial-of-Service Vulnerability
This vulnerability allows local attackers to delete arbitrary directories on affected installations of Avast Premium Security. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the AvastSvc.exe module. By creating a directory junction, an attacker can abuse the service to delete a directory. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Avast Premium Security |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of ZDI-21-208?
The severity of ZDI-21-208 is considered high due to the potential for arbitrary directory deletion.
How do I fix ZDI-21-208?
To fix ZDI-21-208, ensure you update to the latest version of Avast Premium Security that contains the patch.
What versions of Avast Premium Security are affected by ZDI-21-208?
ZDI-21-208 affects specific versions of Avast Premium Security that were vulnerable prior to the release of the fix.
Can ZDI-21-208 be exploited remotely?
No, ZDI-21-208 requires local access and the ability to execute low-privileged code on the target system for exploitation.
What impact does ZDI-21-208 have on affected systems?
ZDI-21-208 allows local attackers to delete arbitrary directories, potentially leading to data loss and system instability.
- agent/type
- agent/softwarecombine
- collector/zdi-advisory
- source/ZDI
- alias/ZDI-21-208
- alias/ZDI-CAN-12082
- alias/CVE-2021-27241
- agent/software-canonical-lookup
- agent/severity
- agent/title
- agent/references
- agent/description
- agent/tags
- agent/event
- agent/source
- vendor/avast
- canonical/avast premium security