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8.6

libxml2 before 2.9.11 allows attackers to crash applications

CVE-2021-3517 · published 5 years ago
Summary

Libxml2 versions before 2.9.11 may crash if given a specially crafted file. This could lead to downtime for the application, and potentially allow an attacker to gain more information about the system. Update to a version of libxml2 2.9.11 or later to fix this issue.

What to do
  • Update mike dalessio nokogiri to version 1.11.4.
  • Update debian libxml2 to version 2.9.10+dfsg-6.6.
  • Update xmlsoft libxml2 to version 2.9.11 or later.
Affected software
Ecosystem VendorProductAffected versions
rubygems mike dalessio nokogiri < 1.11.4
Fix: upgrade to 1.11.4
– xmlsoft libxml2 < 2.9.11
cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*
– redhat jboss_core_services All versions
cpe:2.3:a:redhat:jboss_core_services:-:*:*:*:*:*:*:*
– redhat enterprise_linux 8.0
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
– fedoraproject fedora 33
34
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
– debian debian_linux 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
– netapp active_iq_unified_manager All versions
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
– netapp clustered_data_ontap All versions
cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*
– netapp clustered_data_ontap_antivirus_connector All versions
cpe:2.3:a:netapp:clustered_data_ontap_antivirus_connector:-:*:*:*:*:*:*:*
– netapp e-series_santricity_os_controller >= 11.0.0, <= 11.70.1
cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*
– netapp e-series_santricity_storage_manager All versions
cpe:2.3:a:netapp:e-series_santricity_storage_manager:-:*:*:*:*:*:*:*
– netapp e-series_santricity_web_services All versions
cpe:2.3:a:netapp:e-series_santricity_web_services:-:*:*:*:*:web_services_proxy:*:*
– netapp hci_management_node All versions
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
– netapp manageability_software_development_kit All versions
cpe:2.3:a:netapp:manageability_software_development_kit:-:*:*:*:*:*:*:*
– netapp oncommand_insight All versions
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
– netapp oncommand_workflow_automation All versions
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
– netapp ontap_select_deploy_administration_utility All versions
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
– netapp santricity_unified_manager All versions
cpe:2.3:a:netapp:santricity_unified_manager:-:*:*:*:*:*:*:*
– netapp snapdrive All versions
cpe:2.3:a:netapp:snapdrive:-:*:*:*:*:windows:*:*
– netapp snapmanager All versions
cpe:2.3:a:netapp:snapmanager:-:*:*:*:*:oracle:*:*
– netapp solidfire All versions
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
– netapp hci_h410c_firmware All versions
cpe:2.3:o:netapp:hci_h410c_firmware:-:*:*:*:*:*:*:*
– oracle communications_cloud_native_core_network_function_cloud_native_environment 1.10.0
cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*
– oracle enterprise_manager_base_platform 13.4.0.0
13.5.0.0
cpe:2.3:a:oracle:enterprise_manager_base_platform:13.4.0.0:*:*:*:*:*:*:*
– oracle mysql_workbench <= 8.0.26
cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:*
– oracle openjdk 8
cpe:2.3:a:oracle:openjdk:8:update301:*:*:*:*:*:*
– oracle peoplesoft_enterprise_peopletools 8.58
cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*
– oracle real_user_experience_insight 13.4.1.0
13.5.1.0
cpe:2.3:a:oracle:real_user_experience_insight:13.4.1.0:*:*:*:*:*:*:*
– oracle zfs_storage_appliance_kit 8.8
cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*
– – libxml2 libxml2 2.9.11
Debian:12 debian libxml2 < 2.9.10+dfsg-6.6
Fix: upgrade to 2.9.10+dfsg-6.6
Original advisory text
There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the aff...
There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically
  • Gives an attacker partial control
Severity
8.6 High
Exploitation
17% chance of attack within 30 days
Type
CWE-787Out-of-bounds Write
CWE-125Out-of-bounds Read
Timeline
Published19 May 2021
Updated22 Oct 2026
First seen6 Mar 2026
Sources
GHSA-jw9f-hh49-cvp9 · GHSA
CVE-2021-3517 · NVD
CVE-2021-3517 · MITRE
DEBIAN-CVE-2021-3517 · OSV
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