libcpan-checksums-perl: CVE-2020-16155

Debian Bug report logs - #1033109
libcpan-checksums-perl: CVE-2020-16155

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Moritz Mühlenhoff <jmm@inutil.org>

To: submit@bugs.debian.org

Subject: libcpan-checksums-perl: CVE-2020-16155

Date: Fri, 17 Mar 2023 14:50:29 +0100

Source: libcpan-checksums-perl
X-Debbugs-CC: team@security.debian.org
Severity: important
Tags: security

Hi,

The following vulnerability was published for libcpan-checksums-perl.

CVE-2020-16155[0]:
| The CPAN::Checksums package 2.12 for Perl does not uniquely define
| signed data.

https://blog.hackeriet.no/cpan-signature-verification-vulnerabilities/
http://blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-checksums.html
		

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2020-16155
    https://www.cve.org/CVERecord?id=CVE-2020-16155

Please adjust the affected versions in the BTS as needed.

Message #14 received at 1033109@bugs.debian.org (full text, mbox, reply):

From: gregor herrmann <gregoa@debian.org>

To: 1033109@bugs.debian.org

Cc: Salvatore Bonaccorso <carnil@debian.org>

Subject: Re: Bug#1033109: libcpan-checksums-perl: CVE-2020-16155

Date: Fri, 17 Mar 2023 21:15:12 +0100

[Message part 1 (text/plain, inline)]

On Fri, 17 Mar 2023 14:50:29 +0100, Moritz Mühlenhoff wrote:

> CVE-2020-16155[0]:
> | The CPAN::Checksums package 2.12 for Perl does not uniquely define
> | signed data.
> 
> https://blog.hackeriet.no/cpan-signature-verification-vulnerabilities/
> http://blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-checksums.html

After reading those webpages and looking at the diffs briefly, I
_think_ this is fixed upstream in 2.13 and in Debian with 2.13-1.
 		
What do you think Salvatore?


Cheers,
gregor

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Message #19 received at 1033109@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: gregor herrmann <gregoa@debian.org>

Cc: 1033109@bugs.debian.org, jmm@debian.org

Subject: Re: Bug#1033109: libcpan-checksums-perl: CVE-2020-16155

Date: Fri, 17 Mar 2023 21:40:18 +0100

Hi Gregor,

On Fri, Mar 17, 2023 at 09:15:12PM +0100, gregor herrmann wrote:
> On Fri, 17 Mar 2023 14:50:29 +0100, Moritz Mühlenhoff wrote:
> 
> > CVE-2020-16155[0]:
> > | The CPAN::Checksums package 2.12 for Perl does not uniquely define
> > | signed data.
> > 
> > https://blog.hackeriet.no/cpan-signature-verification-vulnerabilities/
> > http://blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-checksums.html
> 
> After reading those webpages and looking at the diffs briefly, I
> _think_ this is fixed upstream in 2.13 and in Debian with 2.13-1.
>  		
> What do you think Salvatore?

My understanding so far was that the issue is not solely
CPAN::Checksums, but a combination of what we can control in
CPAN::Checksums and on the way the module was called on CPAN.

2.13 adds the additional required path component, so maybe you are
right and we should consider the CVE addressed on the package side
with the addition of the cpan_path key.

For reference:

https://github.com/andk/cpan-checksums/commit/9d2f5f26470ff7ce53ef697d09790fc4db451ab1

Regards,
Salvatore

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