Bug 1905217 (CVE-2020-29562)

Summary:	CVE-2020-29562 glibc: assertion failure in iconv when converting invalid UCS4
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	arjun.is, ashankar, codonell, dj, fweimer, glibc-bugzilla, mfabian, mnewsome, pfrankli, sipoyare, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	glibc 2.33	Doc Type:	If docs needed, set a value
Doc Text:	A denial of service flaw was found in the way glibc's iconv function handled UCS4 text containing an irreversible character. This flaw causes an application compiled with glibc and using the vulnerable function to terminate with an assertion, resulting in a denial of service. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-05-27 17:32:00 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:	1905218, 1912204, 1912205, 1912206
Bug Blocks:	1905219

Description Guilherme de Almeida Suckevicz 2020-12-07 18:34:55 UTC

The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.

Reference:
https://sourceware.org/bugzilla/show_bug.cgi?id=26923

Comment 1 Guilherme de Almeida Suckevicz 2020-12-07 18:36:35 UTC

Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1905218]

Comment 2 Siddhesh Poyarekar 2020-12-08 02:47:23 UTC

Upstream fix: https://sourceware.org/git/?p=glibc.git;h=228edd356f03bf62dcf2b1335f25d43c602ee68d

Comment 3 lnacshon 2020-12-10 10:32:33 UTC

No services using 2.30-2.32

Comment 10 Product Security DevOps Team 2021-05-27 17:32:00 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-29562