Memory Leak Vulnerability in Privoxy
Summary
CVE-2021-20212: A flaw was found in Privoxy in versions before 3.0.29. Affects privoxy versions < 3.0.29-r0. Fixed in 3.0.29-r0. How to fix ↓
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Background
Privoxy is an open-source web proxy server that provides advanced filtering capabilities for enhancing privacy, security, and anonymity while browsing the internet. It acts as an intermediary between the user's device and the web server, allowing users to control and modify web page content. However, a vulnerability has been discovered in Privoxy that can lead to a memory leak and system crash.
Vulnerability Detail
The vulnerability (CVE-2021-20212) in Privoxy versions before 3.0.29 arises when multiple filters are executed, and the last one is skipped due to a pcre error. This results in a memory leak, which can exhaust system resources and cause a crash. An attacker could potentially exploit this vulnerability to disrupt the availability of the Privoxy service or execute arbitrary code on the affected system.
How To Fix
Minimum fixed version
3.0.29-r0
This is the first release that contains the fix.
sudo apk add --upgrade privoxyTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to apply the official patch or update to the fixed version to mitigate the risk.
Conclusion
The memory leak vulnerability in Privoxy can have severe consequences, including system crashes and potential code execution. It is crucial to update to the fixed version (3.0.29 or later) or apply the official patch to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for privoxy →
FAQ
Privoxy is an open-source web proxy server that provides advanced filtering capabilities for enhancing privacy, security, and anonymity while browsing the internet.
The vulnerability can lead to a memory leak and system crash, potentially disrupting the availability of the Privoxy service or allowing an attacker to execute arbitrary code on the affected system.
Versions of Privoxy before 3.0.29 are affected by this vulnerability.
No, there is no known workaround. It is crucial to update to the fixed version or apply the official patch.
Users can obtain the fixed version (3.0.29 or later) from the official Privoxy website or through their package manager.
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