CVE-2020-16156
perl-CPAN: Bypass of verification of signatures in CHECKSUMS files
Severity Score
7.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
2
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
CPAN 2.28 allows Signature Verification Bypass.
CPAN versión 2.28, permite una Omisión de Verificación de Firmas
A flaw was found in the way the perl-CPAN performed verification of package signatures stored in CHECKSUMS files. A malicious or compromised CPAN server used by a user, or a man-in-the-middle attacker, could use this flaw to bypass signature verification.
USN-5689-1 fixed a vulnerability in Perl. This update provides the corresponding update for Ubuntu 22.10. It was discovered that Perl incorrectly handled certain signature verification. An remote attacker could possibly use this issue to bypass signature verification.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2020-07-30 CVE Reserved
- 2021-12-13 CVE Published
- 2024-08-04 CVE Updated
- 2024-08-04 First Exploit
- 2025-06-15 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-347: Improper Verification of Cryptographic Signature
CAPEC
References (7)
URL | Tag | Source |
---|---|---|
https://metacpan.org/pod/distribution/CPAN/scripts/cpan | Product |
URL | Date | SRC |
---|
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Perl Search vendor "Perl" | Comprehensive Perl Archive Network Search vendor "Perl" for product "Comprehensive Perl Archive Network" | 2.28 Search vendor "Perl" for product "Comprehensive Perl Archive Network" and version "2.28" | perl |
Affected
| ||||||
Perl Search vendor "Perl" | Comprehensive Perl Archive Network Search vendor "Perl" for product "Comprehensive Perl Archive Network" | 2.28 Search vendor "Perl" for product "Comprehensive Perl Archive Network" and version "2.28" | trial, perl |
Affected
| ||||||
Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 34 Search vendor "Fedoraproject" for product "Fedora" and version "34" | - |
Affected
| ||||||
Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 35 Search vendor "Fedoraproject" for product "Fedora" and version "35" | - |
Affected
|