Vulnerabilities
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CVE Vulnerabilities

CVE-2021-3518

Use After Free

Published: May 18, 2021 | Modified: Nov 21, 2024
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
8.6 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-3518
CWEhttps://cwe.mitre.org/data/definitions/416.html

Theres a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact from this flaw is to confidentiality, integrity, and availability.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

NameVendorStart VersionEnd Version
Libxml2Xmlsoft*2.9.11 (excluding)
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-apr-util-0:1.6.1-91.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-curl-0:7.78.0-3.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-httpd-0:2.4.37-80.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-mod_cluster-native-0:1.3.16-10.Final_redhat_2.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-mod_http2-0:1.15.7-22.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-mod_jk-0:1.2.48-29.redhat_1.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-mod_md-1:2.0.8-41.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-mod_security-0:2.9.2-68.GA.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-nghttp2-0:1.39.2-41.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-openssl-1:1.1.1g-11.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-openssl-chil-0:1.0.0-11.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-openssl-pkcs11-0:0.4.10-26.el8jbcs*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-apr-util-0:1.6.1-91.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-curl-0:7.78.0-3.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-httpd-0:2.4.37-80.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-mod_cluster-native-0:1.3.16-10.Final_redhat_2.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-mod_http2-0:1.15.7-22.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-mod_jk-0:1.2.48-29.redhat_1.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-mod_md-1:2.0.8-41.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-mod_security-0:2.9.2-68.GA.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-nghttp2-0:1.39.2-41.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-openssl-1:1.1.1g-11.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-openssl-chil-0:1.0.0-11.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-openssl-pkcs11-0:0.4.10-26.jbcs.el7*
Red Hat Enterprise Linux 8RedHatlibxml2-0:2.9.7-9.el8_4.2*
Red Hat Enterprise Linux 8RedHatlibxml2-0:2.9.7-9.el8_4.2*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-controller-rhel8:v1.4.6-4*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-log-reader-rhel8:v1.4.6-4*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-must-gather-rhel8:v1.4.6-4*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-operator-bundle:v1.4.6-5*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-registry-rhel8:v1.4.6-4*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-rsync-transfer-rhel8:v1.4.6-4*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-ui-rhel8:v1.4.6-4*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-velero-plugin-for-aws-rhel8:v1.4.6-4*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-velero-plugin-for-gcp-rhel8:v1.4.6-3*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-velero-plugin-for-microsoft-azure-rhel8:v1.4.6-4*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-velero-restic-restore-helper-rhel8:v1.4.6-5*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-migration-velero-rhel8:v1.4.6-5*
Red Hat Migration Toolkit for Containers 1.4RedHatrhmtc/openshift-velero-plugin-rhel8:v1.4.6-4*
Text-Only JBCSRedHatlibxml2*
Libxml2Ubuntubionic*
Libxml2Ubuntuesm-infra-legacy/trusty*
Libxml2Ubuntuesm-infra/bionic*
Libxml2Ubuntuesm-infra/focal*
Libxml2Ubuntuesm-infra/xenial*
Libxml2Ubuntufocal*
Libxml2Ubuntugroovy*
Libxml2Ubuntuhirsute*
Libxml2Ubuntuprecise/esm*
Libxml2Ubuntutrusty*
Libxml2Ubuntutrusty/esm*
Libxml2Ubuntuupstream*
Libxml2Ubuntuxenial*

Potential Mitigations

References

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