CVE-2021-43396

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2021-43396
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-11-04 20:15:09 UTC
Updated2026-10-14 12:17:16 UTC
DescriptionIn iconvdata/iso-2022-jp-3.c in the GNU C Library (aka glibc) 2.34, remote attackers can force iconv() to emit a spurious '\0' character via crafted ISO-2022-JP-3 data that is accompanied by an internal state reset. This may affect data integrity in certain iconv() use cases. NOTE: the vendor states "the bug cannot be invoked through user input and requires iconv to be invoked with a NULL inbuf, which ought to require a separate application bug to do so unintentionally. Hence there's no security impact to the bug.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

Problem Types: NVD-CWE-noinfo | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None

AV:N/AC:L/Au:N/C:N/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gnu Glibc 2.34 All All All
Application Oracle Communications Cloud Native Core Binding Support Function 22.1.3 All All All
Application Oracle Communications Cloud Native Core Network Function Cloud Native Environment 22.1.0 All All All
Application Oracle Communications Cloud Native Core Network Repository Function 22.1.2 All All All
Application Oracle Communications Cloud Native Core Network Repository Function 22.2.0 All All All
Application Oracle Communications Cloud Native Core Security Edge Protection Proxy 22.1.1 All All All
Application Oracle Communications Cloud Native Core Unified Data Repository 22.2.0 All All All
Application Oracle Enterprise Operations Monitor 4.3 All All All
Application Oracle Enterprise Operations Monitor 4.4 All All All
Application Oracle Enterprise Operations Monitor 5.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
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

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
Vulnerability in iconv identified by TuxCare Team (CVE-2021-43396) af854a3a-2127-422b-91ae-364da2661108 blog.tuxcare.com Exploit, Third Party Advisory
sourceware.org Git - glibc.git/commit af854a3a-2127-422b-91ae-364da2661108 sourceware.org
28524 – Conversion from ISO-2022-JP-3 with iconv may emit spurious NUL character on state reset af854a3a-2127-422b-91ae-364da2661108 sourceware.org Exploit, Issue Tracking, Third Party Advisory
Oracle Critical Patch Update Advisory - July 2022 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
sourceware.org Git - glibc.git/commit MITRE sourceware.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 180459 Debian Security Update for glibc (CVE-2021-43396)
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 671222 EulerOS Security Update for glibc (EulerOS-SA-2022-1006)
  • 671230 EulerOS Security Update for glibc (EulerOS-SA-2022-1026)
  • 671255 EulerOS Security Update for glibc (EulerOS-SA-2022-1164)
  • 671275 EulerOS Security Update for glibc (EulerOS-SA-2022-1240)
  • 671305 EulerOS Security Update for glibc (EulerOS-SA-2022-1252)
  • 671350 EulerOS Security Update for glibc (EulerOS-SA-2022-1267)
  • 901793 Common Base Linux Mariner (CBL-Mariner) Security Update for glibc (6443-1)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report