6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
0.002 Low
EPSS
Percentile
53.4%
CPAN 2.28 allows Signature Verification Bypass.
Author | Note |
---|---|
rayveldkamp | Fix is in cpanpm 2.29 |
leosilva | using only ensured identified https mirrors could be a solution, as even perl modules if a trusted server is used its identity will be verified even in the absense of perl-module-signature. |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | perl | < 5.26.1-6ubuntu0.6 | UNKNOWN |
ubuntu | 20.04 | noarch | perl | < 5.30.0-9ubuntu0.3 | UNKNOWN |
ubuntu | 22.04 | noarch | perl | < 5.34.0-3ubuntu1.1 | UNKNOWN |
ubuntu | 22.10 | noarch | perl | < 5.34.0-5ubuntu1.1 | UNKNOWN |
ubuntu | 23.04 | noarch | perl | < 5.36.0-4ubuntu2 | UNKNOWN |
ubuntu | 14.04 | noarch | perl | < 5.18.2-2ubuntu1.7+esm4 | UNKNOWN |
ubuntu | 16.04 | noarch | perl | < 5.22.1-9ubuntu0.9+esm1 | UNKNOWN |
blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-checksums.html
blog.hackeriet.no/cpan-signature-verification-vulnerabilities/
launchpad.net/bugs/cve/CVE-2020-16156
nvd.nist.gov/vuln/detail/CVE-2020-16156
security-tracker.debian.org/tracker/CVE-2020-16156
ubuntu.com/security/notices/USN-5689-1
ubuntu.com/security/notices/USN-5689-2
www.cve.org/CVERecord?id=CVE-2020-16156
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
0.002 Low
EPSS
Percentile
53.4%