Vulnerability Name:

CVE-2020-16156 (CCN-215691)

Assigned:2020-07-30
Published:2021-11-23
Updated:2022-04-01
Summary:CPAN 2.28 allows Signature Verification Bypass.
CVSS v3 Severity:7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.0 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
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
7.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.0 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
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:6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
6.8 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-347
Vulnerability Consequences:Bypass Security
References:Source: CCN
Type: Neil Bowers Blog, November 23, 2021 6:00 PM
Addressing CPAN vulnerabilities related to checksums

Source: MISC
Type: Exploit, Third Party Advisory
http://blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-checksums.html

Source: MITRE
Type: CNA
CVE-2020-16156

Source: CCN
Type: CPAN Web site
CPAN

Source: CCN
Type: Hackeriet Blog, 23/11/21
Signature Verification Vulnerabilities in CPAN.pm, cpanminus and CPAN::Checksums

Source: MISC
Type: Exploit, Third Party Advisory
https://blog.hackeriet.no/cpan-signature-verification-vulnerabilities/

Source: XF
Type: UNKNOWN
perl-cpan-cve202016156-sec-bypass(215691)

Source: FEDORA
Type: Third Party Advisory
FEDORA-2022-84fd87f7eb

Source: FEDORA
Type: Third Party Advisory
FEDORA-2022-21e8372c42

Source: MISC
Type: Product, Third Party Advisory
https://metacpan.org/pod/distribution/CPAN/scripts/cpan

Vulnerable Configuration:Configuration 1:
  • cpe:/a:perl:comprehensive_perl_archive_network:2.28:-:*:*:*:perl:*:*
  • OR cpe:/a:perl:comprehensive_perl_archive_network:2.28:trial:*:*:*:perl:*:*

  • Configuration 2:
  • cpe:/o:fedoraproject:fedora:34:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:35:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    BACK
    perl comprehensive perl archive network 2.28 -
    perl comprehensive perl archive network 2.28 trial
    fedoraproject fedora 34
    fedoraproject fedora 35