CVE-2023-31484

Exp

CPAN.pm before 2.35 does not verify TLS certificates when downloading distributions over HTTPS.

Published: 2023-04-29 Last update: 2025-11-03 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-31484 is rated High Exploit Risk (76.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.52%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2023-31484

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2023-31484

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-16 1.31% 1.52% +0.21%
2 2026-04-30 1.22% 1.31% +0.09%
3 2026-02-22 — 1.22% —

Full EPSS history (35 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-31484

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-31484

OS Trackers for CVE-2023-31484

vendor priority summary link
debian not yet assigned CVE-2023-31484 not yet assigned priority: Debian including 1 source packages (perl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2023-31484
redhat medium — https://access.redhat.com/security/cve/CVE-2023-31484
suse high CVE-2023-31484 severity important: SUSE including 377 source package names (0.1.6-1.2:perl-5.26.1-150300.17.14.1, 0.1.6-1.2:perl-base-5.26.1-150300.17.14.1, …), 1083 product×package rows across 416 product lines (Container bci/bci-init, Container bci/bci-minimal, … (416 product lines)): Fixed 918, Known Affected 165. https://www.suse.com/security/cve/CVE-2023-31484/
ubuntu medium CVE-2023-31484 medium priority: Ubuntu including 1 source packages (perl), 8 status rows across 8 suites (bionic, focal, jammy, kinetic, lunar, trusty, upstream, xenial): released 8. https://ubuntu.com/security/CVE-2023-31484

Affected software / configurations for CVE-2023-31484

Vendor Product Version Raw CPE
cpanpm_project cpanpm < 2.35 cpe:2.3:a:cpanpm_project:cpanpm:*:*:*:*:*:*:*:*
perl perl < 5.38.0 cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:*

References for CVE-2023-31484

URL Tags
http://www.openwall.com/lists/oss-security/2023/04/29/1 Mailing List Patch
http://www.openwall.com/lists/oss-security/2023/05/03/3 Mailing List Patch
http://www.openwall.com/lists/oss-security/2023/05/03/5 Mailing List
http://www.openwall.com/lists/oss-security/2023/05/07/2 Mailing List
https://blog.hackeriet.no/perl-http-tiny-insecure-tls-default-affects-cpan-modules/ Mitigation Patch Third Party Advisory
https://github.com/andk/cpanpm/pull/175 Exploit Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BM6UW55CNFUTNGD5ZRKGUKKKFDJGMFHL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LEGCEOKFJVBJ2QQ6S2H4NAEWTUERC7SB/
https://metacpan.org/dist/CPAN/changes Release Notes
https://security.netapp.com/advisory/ntap-20240621-0007/
https://www.openwall.com/lists/oss-security/2023/04/18/14 Mailing List Patch
https://lists.debian.org/debian-lts-announce/2024/10/msg00017.html
cvelogic Threat Intelligence