CPAN 2.28 allows Signature Verification Bypass.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3926 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3926-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                       Guilhem Moulin     October 21, 2024                              https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : perl     Version        : 5.32.1-4+deb11u4     CVE ID         : CVE-2020-16156 CVE-2023-31484     Debian Bug     : 1015985 1035109

    Vulnerabilities were found in Perl's CPAN.pm, which could lead CPAN     clients to install malicious modules.

    CVE-2020-16156

        Stig Palmquist discovered that an attacker can prepend checksums for         modified packages to the beginning of CHECKSUMS files, before the         cleartext PGP headers, resulting in signature verification bypass.

        CPAN.pm has been updated so that when configured to validate the         signature on CHECKSUMS, it will refuse to install a tarball if the         associated CHECKSUMS file isn't signed.  The gpg(1) executable is         required in order to validate signatures.

    CVE-2023-31484

        Stig Palmquist discovered that CPAN::HTTP::Client did not verify         X.509 certificates in the HTTP::Tiny call, which could allows an         attacker to MITM the connection with the CPAN mirror.

        CPAN::HTTP::Client now enables the `verify_SSL` flag.  HTTPS mirrors         therefore require a valid certificate.  The identity of the default         mirror https://cpan.org can be verified after installing the         'ca-certificates' package.

    For Debian 11 bullseye, these problems have been fixed in version     5.32.1-4+deb11u4.

    We recommend that you upgrade your perl packages.

    For the detailed security status of perl please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/perl

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - perl: corruption of intermediate language state of compiled regular expression due to integer overflow     leads to DoS (CVE-2020-10878)

  - Perl before 5.30.3 on 32-bit platforms allows a heap-based buffer overflow because nested regular     expression quantifiers have an integer overflow. (CVE-2020-10543)

  - regcomp.c in Perl before 5.30.3 allows a buffer overflow via a crafted regular expression because of     recursive S_study_chunk calls. (CVE-2020-12723)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

This plugin has been deprecated as it does not adhere to established standards for this style of check.

According to the versions of the perl packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - CPAN 2.28 allows Signature Verification Bypass. (CVE-2020-16156)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the perl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - CPAN 2.28 allows Signature Verification Bypass. (CVE-2020-16156)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 22.10 host has packages installed that are affected by a vulnerability as referenced in the USN-5689-2 advisory.

    USN-5689-1 fixed a vulnerability in Perl. This update provides the corresponding update for Ubuntu 22.10.



Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by a vulnerability as referenced in the ALAS2022-2022-161 advisory.

    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. (CVE-2020-16156)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS / 22.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5689-1 advisory.

    It was discovered that Perl incorrectly handled certain signature verification. An remote attacker could     possibly use this issue to bypass signature verification.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the perl-CPAN package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - CPAN 2.28 allows Signature Verification Bypass. (CVE-2020-16156)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

It is, therefore, affected by a vulnerability as referenced in the ALAS2022-2022-072 advisory.

    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. (CVE-2020-16156)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the perl-CPAN package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - CPAN 2.28 allows Signature Verification Bypass. (CVE-2020-16156)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
209443	Debian dla-3926 : libperl-dev - security update	Nessus	Debian Local Security Checks	high
199784	RHEL 8 : perl (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	high
196395	RHEL 6 : perl-cpan (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	high
196382	RHEL 7 : perl-cpan (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	high
178891	EulerOS Virtualization 3.0.6.6 : perl (EulerOS-SA-2023-2432)	Nessus	Huawei Local Security Checks	high
177038	EulerOS 2.0 SP5 : perl (EulerOS-SA-2023-2163)	Nessus	Huawei Local Security Checks	high
168231	Ubuntu 22.10 : Perl vulnerability (USN-5689-2)	Nessus	Ubuntu Local Security Checks	high
167011	Amazon Linux 2022 : perl-CPAN, perl-CPAN-tests (ALAS2022-2022-161)	Nessus	Amazon Linux Local Security Checks	high
166266	Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS / 22.04 LTS : Perl vulnerability (USN-5689-1)	Nessus	Ubuntu Local Security Checks	high
165973	EulerOS Virtualization 3.0.6.0 : perl-CPAN (EulerOS-SA-2022-2581)	Nessus	Huawei Local Security Checks	high
164700	Amazon Linux 2022 : perl-CPAN, perl-CPAN-tests (ALAS2022-2022-072)	Nessus	Amazon Linux Local Security Checks	high
159244	EulerOS 2.0 SP8 : perl-CPAN (EulerOS-SA-2022-1358)	Nessus	Huawei Local Security Checks	high

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