Vulnerability Name:

CVE-2021-20213 (CCN-196179)

Assigned:2020-12-17
Published:2021-02-03
Updated:2021-12-14
Summary:A flaw was found in Privoxy in versions before 3.0.29. Dereference of a NULL-pointer that could result in a crash if accept-intercepted-requests was enabled, Privoxy failed to get the request destination from the Host header and a memory allocation failed.
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:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
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-476
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-20213

Source: MISC
Type: Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1928739

Source: XF
Type: UNKNOWN
privoxy-cve202120213-dos(196179)

Source: CCN
Type: oss-sec Mailing List, Wed, 3 Feb 2021 12:05:55 +0100
Re: Multiple memory leaks fixed in Privoxy 3.0.29 stable

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

Source: CCN
Type: Privoxy Web site
Privoxy

Source: MISC
Type: Release Notes, Vendor Advisory
https://www.privoxy.org/3.0.29/user-manual/whatsnew.html

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2021-20213

Vulnerable Configuration:Configuration 1:
  • cpe:/a:privoxy:privoxy:*:*:*:*:*:*:*:* (Version < 3.0.29)

    • Configuration CCN 1:
  • cpe:/a:privoxy:privoxy:3.0.28:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    privoxy privoxy *
    privoxy privoxy 3.0.28