CVE-2021-3541

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Summary

CVECVE-2021-3541
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-07-09 17:15:07 UTC
Updated2026-10-14 10:17:45 UTC
DescriptionA flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

Problem Types: CWE-776 | Denial of Service

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary4AV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS v3.1 Breakdown

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

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

CVSS v2.0 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Netapp Active Iq Unified Manager - All All All
Application Netapp Cloud Backup - All All All
Application Netapp Clustered Data Ontap - All All All
Application Netapp Clustered Data Ontap Antivirus Connector - All All All
Hardware Netapp H300e - All All All
Operating System Netapp H300e Firmware - All All All
Hardware Netapp H300s - All All All
Operating System Netapp H300s Firmware - All All All
Hardware Netapp H410c - All All All
Operating System Netapp H410c Firmware - All All All
Hardware Netapp H410s - All All All
Operating System Netapp H410s Firmware - All All All
Hardware Netapp H500e - All All All
Operating System Netapp H500e Firmware - All All All
Hardware Netapp H500s - All All All
Operating System Netapp H500s Firmware - All All All
Hardware Netapp H700e - All All All
Operating System Netapp H700e Firmware - All All All
Hardware Netapp H700s - All All All
Operating System Netapp H700s Firmware - All All All
Application Netapp Manageability Software Development Kit - All All All
Application Netapp Ontap Select Deploy Administration Utility - All All All
Application Netapp Smi-s Provider - All All All
Application Netapp Snapdrive - All All All
Application Oracle Zfs Storage Appliance Kit 8.8 All All All
Application Redhat Jboss Core Services - All All All
Application Xmlsoft Libxml2 All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Libxml2 affected 2.9.11 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
Oracle Critical Patch Update Advisory - January 2022 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
1950515 – (CVE-2021-3541) CVE-2021-3541 libxml2: Exponential entity expansion attack bypasses all existing protection mechanisms af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Patch, Third Party Advisory
CVE-2021-3541 Libxml2 Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159285 Oracle Enterprise Linux Security Update for libxml2 (ELSA-2021-2569)
  • 178608 Debian Security Update for libxml2 (DLA 2669-1)
  • 180540 Debian Security Update for libxml2 (CVE-2021-3541)
  • 198409 Ubuntu Security Notification for libxml2 vulnerabilities (USN-4991-1)
  • 239468 Red Hat Update for libxml2 (RHSA-2021:2569)
  • 240235 Red Hat Update for JBoss Core Services (RHSA-2022:1389)
  • 281155 Fedora Security Update for libxml2 (FEDORA-2021-e8b7e177a4)
  • 281707 Fedora Security Update for libxml2 (FEDORA-2021-b950000d2b)
  • 282302 Fedora Security Update for qt5 (FEDORA-2022-ecdf338eb1)
  • 282329 Fedora Security Update for qt5 (FEDORA-2022-e39987b17d)
  • 296065 Oracle Solaris 11.4 Support Repository Update (SRU) 39.107.1 Missing (CPUOCT2021)
  • 352392 Amazon Linux Security Advisory for libxml2: ALAS2-2021-1662
  • 354638 Amazon Linux Security Advisory for libxml2 : AL2012-2022-370
  • 354929 Amazon Linux Security Advisory for libxml2 : ALAS-2023-1743
  • 377408 Alibaba Cloud Linux Security Update for libxml2 (ALINUX3-SA-2021:0047)
  • 377937 Splunk Enterprise Multiple Vulnerabilities (svd-2022-0804)
  • 500343 Alpine Linux Security Update for libxml2
  • 501424 Alpine Linux Security Update for libxml2
  • 501915 Alpine Linux Security Update for qt5-qtwebengine
  • 501968 Alpine Linux Security Update for libxml2
  • 502486 Alpine Linux Security Update for libxml2
  • 504106 Alpine Linux Security Update for libxml2
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 670491 EulerOS Security Update for libxml2 (EulerOS-SA-2021-2249)
  • 670517 EulerOS Security Update for libxml2 (EulerOS-SA-2021-2275)
  • 670548 EulerOS Security Update for libxml2 (EulerOS-SA-2021-2306)
  • 670581 EulerOS Security Update for libxml2 (EulerOS-SA-2021-2339)
  • 670648 EulerOS Security Update for libxml2 (EulerOS-SA-2021-2406)
  • 670851 EulerOS Security Update for libxml2 (EulerOS-SA-2021-2406)
  • 670996 EulerOS Security Update for libxml2 (EulerOS-SA-2021-2595)
  • 690134 Free Berkeley Software Distribution (FreeBSD) Security Update for libxml2 (524bd03a-bb75-11eb-bf35-080027f515ea)
  • 710071 Gentoo Linux libxml2 Multiple vulnerabilities (GLSA 202107-05)
  • 750136 SUSE Enterprise Linux Security Update for libxml2 (SUSE-SU-2021:1917-1)
  • 750642 OpenSUSE Security Update for libxml2 (openSUSE-SU-2021:0886-1)
  • 750677 SUSE Enterprise Linux Security Update for libxml2 (SUSE-SU-2021:2016-1)
  • 750770 OpenSUSE Security Update for libxml2 (openSUSE-SU-2021:1917-1)
  • 753947 SUSE Enterprise Linux Security Update for libxml2 (SUSE-SU-2023:2048-1)
  • 940375 AlmaLinux Security Update for libxml2 (ALSA-2021:2569)
  • 960016 Rocky Linux Security Update for libxml2 (RLSA-2021:2569)

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