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Fedora 31 FEDORA-2020-39d40d9ae9 Critical: Email MIME Parsing Limit Issue

fedora
Calendar Grey June 2, 2020
Dist Fedora Esm H88
Revise boundary restrictions within nested MIME segments to prevent memory overflow problems in Fedora 31's perl-Email-MIME-ContentType library.
This update limits the number of nested MIME parts to 10 (by default), to avoid a possible memory exhaustion issue with lots of tiny MIME parts.

Summary

This module is responsible for parsing email content type headers according

to section 5.1 of RFC 2045. It returns a hash with entries for the type, the

subtype, and a hash of attributes.

For backward compatibility with a really unfortunate misunderstanding of RFC

2045 by the early implementors of this module, 'discrete' and 'composite' are

also present in the returned hashref, with the values of 'type' and 'subtype'

respectively.

This update limits the number of nested MIME parts to 10 (by default), to avoid

a possible memory exhaustion issue with lots of tiny MIME parts.

* Sun May 24 2020 Paul Howarth - 1.024-1

- Update to 1.024

- Silence an uninitialized value warning

- Avoid allowing non-Latin digits in numbers

- Add new functions build_content_type() and build_content_disposition()

* Wed Jan 29 2020 Fedora Release Engineering - 1.022-9

- Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild

* Wed Oct 16 2019 Paul Howarth - 1.022-8

- Spec tidy-up

- Use author-independent source URL

- Classify buildreqs by usage

- Use DESTDIR rather than PERL_INSTALL_ROOT

- Simplify find command using -delete

- Fix permissions verbosely

- Use %license

- Make %files list more explicit

[ 1 ] Bug #1835353 - rubygem-mail: Out of memory issue through nested MIME parts

https://bugzilla.redhat.com/show_bug.cgi?id=1835353

su -c 'dnf upgrade --advisory FEDORA-2020-39d40d9ae9' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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Change Log

References

Update Instructions

Severity
critical
Lowest
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Medium
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Critical

Product: Fedora 31
Version: 1.024
Release: 1.fc31
Summary: Parse a MIME Content-Type Header

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