Vulnerability Name:

CVE-2021-20216 (CCN-195881)

Assigned:2020-12-17
Published:2021-01-31
Updated:2022-08-05
Summary:A flaw was found in Privoxy in versions before 3.0.31. A memory leak that occurs when decompression fails unexpectedly may lead to a denial of service. The highest threat from this vulnerability is to system availability.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:7.8 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-401
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-20216

Source: MISC
Type: Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1923256

Source: XF
Type: UNKNOWN
privoxy-decompression-dos(195881)

Source: CCN
Type: oss-sec Mailing List, Sun, 31 Jan 2021 13:13:08 +0100
Two DoS issues fixed in Privoxy 3.0.31 stable

Source: GENTOO
Type: Third Party Advisory
GLSA-202107-16

Source: MISC
Type: Mailing List, Release Notes, Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/01/31/2

Source: CCN
Type: Privoxy Web site
Privoxy

Source: MISC
Type: Release Notes, Vendor Advisory
https://www.privoxy.org/3.0.31/user-manual/whatsnew.html

Vulnerable Configuration:Configuration 1:
  • cpe:/a:privoxy:privoxy:*:*:*:*:*:*:*:* (Version < 3.0.31)

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:113171
    P
    		privoxy-3.0.32-2.3 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:106594
    P
    		privoxy-3.0.32-2.3 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:11178
    P
    		Security update for privoxy (Moderate)
    2021-02-12
    oval:org.opensuse.security:def:96447
    P
    		Security update for privoxy (Moderate)
    2021-02-12
    oval:org.opensuse.security:def:103137
    P
    		Security update for privoxy (Moderate)
    2021-02-12
    oval:org.opensuse.security:def:109794
    P
    		Security update for privoxy (Moderate)
    2021-02-12
    oval:org.opensuse.security:def:111212
    P
    		Security update for privoxy (Moderate)
    2021-02-08
    BACK
    privoxy privoxy *