Bug 1905218

Summary:	CVE-2020-29562 glibc: assertion failure in iconv when converting invalid UCS4 [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	glibc	Assignee:	Carlos O'Donell <codonell>
Status:	CLOSED RAWHIDE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	33	CC:	aoliva, arjun.is, codonell, dj, fweimer, law, mfabian, pfrankli, rth, sipoyare
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	glibc-2.32.9000-23.fc34	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-12-18 12:26:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1905217, 1912206

Description Guilherme de Almeida Suckevicz 2020-12-07 18:35:14 UTC

This is an automatically created tracking bug!  It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.

For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.

For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs

When submitting as an update, use the fedpkg template provided in the next
comment(s).  This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.

Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.

NOTE: this issue affects multiple supported versions of Fedora. While only
one tracking bug has been filed, please correct all affected versions at
the same time.  If you need to fix the versions independent of each other,
you may clone this bug as appropriate.

Comment 1 Guilherme de Almeida Suckevicz 2020-12-07 18:36:24 UTC

Use the following template to for the 'fedpkg update' request to submit an
update for this issue as it contains the top-level parent bug(s) as well as
this tracking bug.  This will ensure that all associated bugs get updated
when new packages are pushed to stable.

=====

# bugfix, security, enhancement, newpackage (required)
type=security

# low, medium, high, urgent (required)
severity=medium

# testing, stable
request=testing

# Bug numbers: 1234,9876
bugs=1905217,1905218

# Description of your update
notes=Security fix for [PUT CVEs HERE]

# Enable request automation based on the stable/unstable karma thresholds
autokarma=True
stable_karma=3
unstable_karma=-3

# Automatically close bugs when this marked as stable
close_bugs=True

# Suggest that users restart after update
suggest_reboot=False

======

Additionally, you may opt to use the bodhi web interface to submit updates:

https://bodhi.fedoraproject.org/updates/new

Comment 2 Carlos O'Donell 2020-12-08 14:18:54 UTC

This is fixed upstream here:

commit 228edd356f03bf62dcf2b1335f25d43c602ee68d (HEAD -> master, origin/master, origin/HEAD)
Author: Michael Colavita <mcolavita>
Date:   Thu Nov 19 11:44:40 2020 -0500

    iconv: Fix incorrect UCS4 inner loop bounds (BZ#26923)
    
    Previously, in UCS4 conversion routines we limit the number of
    characters we examine to the minimum of the number of characters in the
    input and the number of characters in the output. This is not the
    correct behavior when __GCONV_IGNORE_ERRORS is set, as we do not consume
    an output character when we skip a code unit. Instead, track the input
    and output pointers and terminate the loop when either reaches its
    limit.
    
    This resolves assertion failures when resetting the input buffer in a step of
    iconv, which assumes that the input will be fully consumed given sufficient
    output space.

The next Rawhide rebase on December 14th will include the fix.

At that point we'll mark this CLOSED/RAWHIDE.