CVE-2020-16156

mediumpriority · track · 31EPSS 0.009 · 58 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.86% (58th) EPSS
CVSS 6.8 · medium
Is it mine?
41 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

CPAN 2.28 allows Signature Verification Bypass.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedperl-CPAN-0:2.18-402.el8_10.noarch as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2025:8432
  • Fixedperl-CPAN-0:2.18-402.el8_10.src as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2025:8432
  • Workaroundperl-CPAN-0:2.18-402.el8_10.noarch as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    This issue can be mitigated by configuring perl-CPAN to only use trusted CPAN mirrors (www.cpan.org or cpan.metacpan.org) and use HTTPS for communication with CPAN servers. If you already have a cpan configured, the list of configured mirrors can be viewed by running the `cpan` command without any argument and entering the following command on the cpan command's prompt: ``` o conf urllist ``` Ensure that the URL list only includes trusted mirrors and that https:// scheme is used for all URLs. A different set of mirrors can be configured using the following commands (these examples show how to configure one or more mirrors, only one of the commands should be used): ``` o conf urllist https://www.cpan.org o conf urllist https://www.cpan.org https://cpan.metacpan.org ``` After changing configuration, the following command must be used to save the configuration: ``` o conf commit ```

  • Workaroundperl-CPAN-0:2.18-402.el8_10.src as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    This issue can be mitigated by configuring perl-CPAN to only use trusted CPAN mirrors (www.cpan.org or cpan.metacpan.org) and use HTTPS for communication with CPAN servers. If you already have a cpan configured, the list of configured mirrors can be viewed by running the `cpan` command without any argument and entering the following command on the cpan command's prompt: ``` o conf urllist ``` Ensure that the URL list only includes trusted mirrors and that https:// scheme is used for all URLs. A different set of mirrors can be configured using the following commands (these examples show how to configure one or more mirrors, only one of the commands should be used): ``` o conf urllist https://www.cpan.org o conf urllist https://www.cpan.org https://cpan.metacpan.org ``` After changing configuration, the following command must be used to save the configuration: ``` o conf commit ```

02

cvss

Technical severity, 0–10. One row per scoring source.

7.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9
v3.17.5highAV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · Red Hat Product Security US
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-347USprimaryCWE-347USCWE-347US
04

affected products (41)

Products and version ranges known to be affected.

showing 20 of 41
05

advisories (2)

Vendor and ecosystem advisories describing this.

  • RHSA-2025:8432Red Hat Security Advisory: perl-CPAN security update2025-06-03csaf · redhat_csafUS

    An update for perl-CPAN is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  • WID-SEC-W-2023-0138Oracle Communications Applications: Mehrere SchwachstellenDeutsch2023-01-17csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Oracle Communications Applications ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundredhat_csafNVDCVE.orgMITRE
published 2021-12-13modified 2026-06-17
09

references (22)

External citations — patches, advisories, analysis.

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