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Vulnerability DatabaseCVE-2021-20273

CVE-2021-20273: 
Privoxy vulnerability analysis and mitigation

Overview

A vulnerability (CVE-2021-20273) was discovered in Privoxy versions before 3.0.32. The vulnerability allows a crash to occur via a crafted CGI request when Privoxy is toggled off (CVE Mitre, NVD).

Technical details

The vulnerability has been assigned a CVSS v3.1 Base Score of 7.5 (High) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. The vulnerability is characterized by improper input validation (CWE-20) that can be triggered remotely with low attack complexity and requires no privileges or user interaction (NVD).

Impact

When successfully exploited, this vulnerability can result in a denial of service condition through application crash when Privoxy is in a toggled-off state (Ubuntu Security).

Exploitability

The vulnerability can be exploited remotely by sending a specially crafted CGI request to a Privoxy instance that is toggled off. No special privileges or user interaction is required for exploitation (Red Hat Bugzilla).

Mitigation and workarounds

The vulnerability has been fixed in Privoxy version 3.0.32. Users are advised to upgrade to this version or later. Multiple distributions have released security updates to address this vulnerability, including Ubuntu, Debian, and Gentoo (Debian LTS, Gentoo Security).

Additional resources

Source: This report was generated using AI

Related Privoxy vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2021-44542HIGH7.5
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  • privoxy-doc
NoYesDec 23, 2021
CVE-2021-44541HIGH7.5
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  • privoxy
NoYesDec 23, 2021
CVE-2021-44540HIGH7.5
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  • privoxy-doc
NoYesDec 23, 2021
CVE-2021-20209HIGH7.5
  • Privoxy logoPrivoxy
  • privoxy
NoYesMay 25, 2021
CVE-2021-44543MEDIUM6.1
  • Privoxy logoPrivoxy
  • privoxy
NoYesDec 23, 2021

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