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Vulnerability DatabaseCVE-2021-44540

CVE-2021-44540: 
Privoxy vulnerability analysis and mitigation

Overview

A vulnerability (CVE-2021-44540) was discovered in Privoxy, affecting versions prior to 3.0.33. The issue was related to memory management in the geturlspec_param() function. The vulnerability was reported by Joshua Rogers from Opera and was fixed in Privoxy version 3.0.33, released in December 2021 (OSS Security).

Technical details

The vulnerability received 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 issue was classified as CWE-401 (Missing Release of Memory after Effective Lifetime) and involved improper memory management where the compiled pattern spec wasn't being freed before bailing in the geturlspec_param() function (NVD, Ubuntu).

Impact

The vulnerability primarily affects the availability of the system. With a High availability impact rating and no impact on confidentiality or integrity, the vulnerability could potentially lead to denial of service conditions (Ubuntu).

Mitigation and workarounds

The vulnerability was fixed in Privoxy version 3.0.33. Users are advised to upgrade to this version or later. The fix involves properly freeing memory of compiled pattern spec before bailing in the geturlspec_param() function (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
  • privoxy
NoYesDec 23, 2021
CVE-2021-20209HIGH7.5
  • PrivoxyPrivoxy
  • net-proxy/privoxy
NoYesMay 25, 2021
CVE-2021-44543MEDIUM6.1
  • PrivoxyPrivoxy
  • privoxy
NoYesDec 23, 2021

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