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{"bugzilla": {"description": "perl-App-cpanminus: Bypass of verification of signatures in CHECKSUMS files", "id": "2035341", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2035341"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-347", "details": ["The App::cpanminus package 1.7044 for Perl allows Signature Verification Bypass.", "A flaw was found in the way the perl-App-cpanminus 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."], "mitigation": {"lang": "en:us", "value": "This issue can be mitigated by instructing perl-App-cpanminus to only use trusted CPAN mirrors (www.cpan.org or cpan.metacpan.org) and use HTTPS for communication with CPAN servers. The `cpanm` command can be configured to use the specific CPAN mirror using the --from command line option by running it as:\n```\ncpanm --from https://www.cpan.org ...\n```\nYou can also set environment variable PERL_CPANM_OPT to include this command line option to avoid having to specify the URL for every cpanm invocation:\n```\nexport PERL_CPANM_OPT=\"--from https://www.cpan.org\"\n```"}, "name": "CVE-2020-16154", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "perl-App-cpanminus", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "perl-App-cpanminus:1.7044/perl-App-cpanminus", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "perl-App-cpanminus", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Will not fix", "package_name": "rh-perl530-perl-App-cpanminus", "product_name": "Red Hat Software Collections"}], "public_date": "2021-11-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-16154\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-16154\nhttp://blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-checksums.html\nhttps://blog.hackeriet.no/cpan-signature-verification-vulnerabilities/"], "threat_severity": "Moderate"}