CVE-2020-29562

Summary

CVE	CVE-2020-29562
State	PUBLISHED
Assigner	mitre
Source Priority	CVE Program / NVD first with legacy fallback
Published	2020-12-04 07:15:11 UTC
Updated	2026-10-14 10:17:34 UTC
Description	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.

Primary CVSS: v3.1 4.8 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H

Problem Types: CWE-617 | n/a | CWE-617 CWE-617 Reachable Assertion

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Primary	4.8	MEDIUM	`CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H`
3.1	ADP	DECLARED	4.8	MEDIUM	`CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H`
3.1	134c704f-9b21-4f2e-91b3-4a467353bcc0	Secondary	4.8	MEDIUM	`CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H`
2.0	[email protected]	Primary	2.1		`AV:N/AC:H/Au:S/C:N/I:N/A:P`

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H

Access Vector

Network

Access Complexity

High

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

AV:N/AC:H/Au:S/C:N/I:N/A:P

Type	Vendor	Product	Version	Update	Edition	Language
Operating System	Fedoraproject	Fedora	32	All	All	All
Application	Gnu	Glibc	All	All	All	All
Application	Netapp	E-series Santricity Os Controller	All	All	All	All

Source	Vendor	Product	Version	Platforms
CNA	Na	N/a	affected n/a	Not specified
ADP	Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	affected V3.1.0 V3.1.5 custom	Not specified
ADP	Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	affected V3.1.0 V3.1.5 custom	Not specified
ADP	Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	affected V3.1.0 V3.1.5 custom	Not specified
ADP	Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	affected V3.1.0 V3.1.5 custom	Not specified
ADP	Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	affected V3.1.0 V3.1.5 custom	Not specified

Reference	Source	Link	Tags
cert-portal.siemens.com/productcert/html/ssa-398330.html	0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	cert-portal.siemens.com
glibc: Multiple vulnerabilities (GLSA 202101-20) — Gentoo security	af854a3a-2127-422b-91ae-364da2661108	security.gentoo.org	Third Party Advisory
[SECURITY] Fedora 32 Update: glibc-2.31-5.fc32 - package-announce - Fedora Mailing-Lists	af854a3a-2127-422b-91ae-364da2661108	lists.fedoraproject.org
cert-portal.siemens.com/productcert/html/ssa-831302.html	0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	cert-portal.siemens.com
December 2020 GNU C Library Vulnerabilities in NetApp Products \| NetApp Product Security	af854a3a-2127-422b-91ae-364da2661108	security.netapp.com	Third Party Advisory
26923 – (CVE-2020-29562) Assertion failure in iconv when converting invalid UCS4 (CVE-2020-29562)	af854a3a-2127-422b-91ae-364da2661108	sourceware.org	Exploit, Issue Tracking, Patch, Third Party Advisory
lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685a...	af854a3a-2127-422b-91ae-364da2661108	lists.apache.org
[SECURITY] Fedora 32 Update: glibc-2.31-5.fc32 - package-announce - Fedora Mailing-Lists	MITRE	lists.fedoraproject.org
Pony Mail!	MITRE	lists.apache.org
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

174895 SUSE Enterprise Linux Security Update for glibc (SUSE-SU-2021:1165-1)
198685 Ubuntu Security Notification for GNU C Library Vulnerabilities (USN-5310-1)
591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
6140033 AWS Bottlerocket Security Update for glibc (GHSA-7xrc-mr8j-849j)
750341 OpenSUSE Security Update for glibc (openSUSE-SU-2021:0358-1)