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Vulnerability DatabaseCVE-2021-44541

CVE-2021-44541: 
Privoxy vulnerability analysis and mitigation

Overview

A memory leak vulnerability (CVE-2021-44541) was discovered in Privoxy, affecting versions up to 3.0.33. The vulnerability was identified in the processencryptedrequest_headers() function, where header memory was not properly freed when failing to get the request destination (NVD, OSS Security).

Technical details

The vulnerability received a CVSS v3.1 base score of 7.5 (High), with a vector string of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. The issue is classified as CWE-401 (Missing Release of Memory after Effective Lifetime). The vulnerability was introduced in Privoxy version 3.0.29 and affects all versions up to, but not including, version 3.0.33 (NVD, Ubuntu).

Impact

The vulnerability primarily affects system availability. With a CVSS score indicating high availability impact but no impact on confidentiality or integrity, the vulnerability could potentially lead to denial of service conditions through memory exhaustion (NVD).

Mitigation and workarounds

The vulnerability was fixed in Privoxy version 3.0.33. The fix involves properly freeing header memory when failing to get the request destination. The patch was provided by Joshua Rogers from Opera and committed to the Privoxy repository (OSS 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
  • PrivoxyPrivoxy
  • privoxy
NoYesDec 23, 2021
CVE-2021-44541HIGH7.5
  • PrivoxyPrivoxy
  • privoxy
NoYesDec 23, 2021
CVE-2021-44540HIGH7.5
  • PrivoxyPrivoxy
  • cpe:2.3:a:privoxy:privoxy
NoYesDec 23, 2021
CVE-2021-20209HIGH7.5
  • PrivoxyPrivoxy
  • privoxy
NoYesMay 25, 2021
CVE-2021-44543MEDIUM6.1
  • PrivoxyPrivoxy
  • privoxy
NoYesDec 23, 2021

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