Vulnerability Name:

CVE-2020-36327 (CCN-201080)

Assigned:2020-09-30
Published:2020-09-30
Updated:2022-04-05
Summary:Bundler 1.16.0 through 2.2.9 and 2.2.11 through 2.2.16 sometimes chooses a dependency source based on the highest gem version number, which means that a rogue gem found at a public source may be chosen, even if the intended choice was a private gem that is a dependency of another private gem that is explicitly depended on by the application.
Note: it is not correct to use CVE-2021-24105 for every "Dependency Confusion" issue in every product.
CVSS v3 Severity:8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
9.8 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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): High
Integrity (I): High
Availibility (A): High
8.8 High (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.7 High (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:9.3 High (CVSS v2 Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-noinfo
CWE-494
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2020-36327

Source: CCN
Type: bundler Web site
A more secure bundler: We fixed our source priorities.

Source: MISC
Type: Vendor Advisory
https://bundler.io/blog/2021/02/15/a-more-secure-bundler-we-fixed-our-source-priorities.html

Source: XF
Type: UNKNOWN
bundler-cve202036327-code-exec(201080)

Source: CCN
Type: GitHub Web site
Global vs block gem server source priority doesn't work as expected #3982

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://github.com/rubygems/rubygems/issues/3982

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-36cdab1f8d

Source: MISC
Type: Third Party Advisory
https://mensfeld.pl/2021/02/rubygems-dependency-confusion-attack-side-of-things/

Source: MISC
Type: Patch, Vendor Advisory
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24105

Source: CCN
Type: IBM Security Bulletin 6831813 (Netcool Operations Insight)
Netcool Operations Insight v1.6.6 contains fixes for multiple security vulnerabilities.

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2020-36327

Source: MISC
Type: Exploit, Third Party Advisory
https://www.zofrex.com/blog/2021/04/29/bundler-still-vulnerable-dependency-confusion-cve-2020-36327/

Vulnerable Configuration:Configuration 1:
  • cpe:/a:bundler:bundler:*:*:*:*:*:ruby:*:* (Version >= 1.16.0 and < 2.2.10)
  • OR cpe:/a:bundler:bundler:*:*:*:*:*:ruby:*:* (Version >= 2.2.11 and <= 2.2.16)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:34:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/a:microsoft:package_manager_configurations:-:*:*:*:*:*:*:*

    • Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:bundler:bundler:1.16.0:-:*:*:*:ruby:*:*
  • OR cpe:/a:bundler:bundler:2.2.9:*:*:*:*:ruby:*:*
  • OR cpe:/a:bundler:bundler:2.2.11:*:*:*:*:ruby:*:*
  • OR cpe:/a:bundler:bundler:2.2.16:*:*:*:*:ruby:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.redhat.rhsa:def:20220543
    P
    		RHSA-2022:0543: ruby:2.6 security update (Important)
    2022-02-16
    oval:com.redhat.rhsa:def:20220545
    P
    		RHSA-2022:0545: ruby:2.5 security update (Important)
    2022-02-16
    oval:com.redhat.rhsa:def:20213020
    P
    		RHSA-2021:3020: ruby:2.7 security update (Important)
    2021-08-05
    BACK
    bundler bundler *
    bundler bundler *
    fedoraproject fedora 34
    microsoft package manager configurations -
    bundler bundler 1.16.0 -
    bundler bundler 2.2.9
    bundler bundler 2.2.11
    bundler bundler 2.2.16