CVE-2019-19956: High severity Siemens SINEMA Remote Connect Server vulnerability

Published Dec 24, 2019
·
Updated

Last updated 25 August 2025

Other sources

libxml2 is vulnerable to a denial of service, caused by a memory leak in xmlParseBalancedChunkMemoryRecover in parser.c. By persuading a victim to open a specially crafted file, a remote attacker could exploit this vulnerability to cause the application to crash.

— IBM

xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.

Affected Software

36 affected componentsFixes available
redhat/jbcs-httpd24-curl<0:7.64.1-36.jbcs.el6
0:7.64.1-36.jbcs.el6
redhat/jbcs-httpd24-httpd<0:2.4.37-57.jbcs.el6
0:2.4.37-57.jbcs.el6
redhat/jbcs-httpd24-nghttp2<0:1.39.2-25.jbcs.el6
0:1.39.2-25.jbcs.el6
redhat/jbcs-httpd24-curl<0:7.64.1-36.jbcs.el7
0:7.64.1-36.jbcs.el7
redhat/jbcs-httpd24-httpd<0:2.4.37-57.jbcs.el7
0:2.4.37-57.jbcs.el7
redhat/jbcs-httpd24-nghttp2<0:1.39.2-25.jbcs.el7
0:1.39.2-25.jbcs.el7
redhat/jbcs-httpd24-openssl-pkcs11<0:0.4.10-7.jbcs.el7
0:0.4.10-7.jbcs.el7
redhat/libxml2<0:2.9.1-6.el7.5
0:2.9.1-6.el7.5
redhat/libxml2<0:2.9.7-8.el8
0:2.9.7-8.el8
Siemens SINEMA Remote Connect Server<3.0
3.0
IBM Security Guardium<=10.5
IBM Security Guardium<=10.6
IBM Security Guardium<=11.0
IBM Security Guardium<=11.1
IBM Security Guardium<=11.2
IBM Security Guardium<=11.3
Xmlsoft Libxml2<2.9.10
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Oracle Real User Experience Insight=13.3.1.0
Fedoraproject Fedora=30
Fedoraproject Fedora=32
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.10
NetApp Active Iq Unified Manager Vmware Vsphere
NetApp Clustered Data ONTAP
NetApp Clustered Data Ontap Antivirus Connector
NetApp Manageability Software Development Kit
NetApp ONTAP Select Deploy administration utility
NetApp Steelstore Cloud Integrated Storage
Siemens SINEMA Remote Connect Server<3.0
redhat/libxml2<2.9.10
2.9.10
debian/libxml2
2.9.10+dfsg-6.7+deb11u42.9.10+dfsg-6.7+deb11u102.9.14+dfsg-1.3~deb12u52.9.14+dfsg-1.3~deb12u42.12.7+dfsg+really2.9.14-2.1+deb13u22.12.7+dfsg+really2.9.14-2.1+deb13u12.15.3+dfsg-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/jbcs-httpd24-curl to a version that resolves this vulnerability.

    Fixed in 0:7.64.1-36.jbcs.el6
  2. Upgrade

    Upgrade redhat/jbcs-httpd24-httpd to a version that resolves this vulnerability.

    Fixed in 0:2.4.37-57.jbcs.el6
  3. Upgrade

    Upgrade redhat/jbcs-httpd24-nghttp2 to a version that resolves this vulnerability.

    Fixed in 0:1.39.2-25.jbcs.el6
  4. Upgrade

    Upgrade redhat/jbcs-httpd24-curl to a version that resolves this vulnerability.

    Fixed in 0:7.64.1-36.jbcs.el7
  5. Upgrade

    Upgrade redhat/jbcs-httpd24-httpd to a version that resolves this vulnerability.

    Fixed in 0:2.4.37-57.jbcs.el7
  6. Upgrade

    Upgrade redhat/jbcs-httpd24-nghttp2 to a version that resolves this vulnerability.

    Fixed in 0:1.39.2-25.jbcs.el7
  7. Upgrade

    Upgrade redhat/jbcs-httpd24-openssl-pkcs11 to a version that resolves this vulnerability.

    Fixed in 0:0.4.10-7.jbcs.el7
  8. Upgrade

    Upgrade redhat/libxml2 to a version that resolves this vulnerability.

    Fixed in 0:2.9.1-6.el7.5
  9. Upgrade

    Upgrade redhat/libxml2 to a version that resolves this vulnerability.

    Fixed in 0:2.9.7-8.el8
  10. Upgrade

    Upgrade Siemens SINEMA Remote Connect to a version that resolves this vulnerability.

    Fixed in 3.0
  11. Upgrade

    Upgrade redhat/libxml2 to a version that resolves this vulnerability.

    Fixed in 2.9.10
  12. Upgrade

    Upgrade debian/libxml2 to a version that resolves this vulnerability.

    Fixed in 2.9.10+dfsg-6.7+deb11u4Fixed in 2.9.10+dfsg-6.7+deb11u10Fixed in 2.9.14+dfsg-1.3~deb12u5Fixed in 2.9.14+dfsg-1.3~deb12u4Fixed in 2.12.7+dfsg+really2.9.14-2.1+deb13u2Fixed in 2.12.7+dfsg+really2.9.14-2.1+deb13u1Fixed in 2.15.3+dfsg-1
  13. Upgrade

    Upgrade libxml2 to a version that resolves this vulnerability.

    Fixed in 2.9.10

Event History

Dec 24, 2019
CVE Published
via MITRE·03:12 PM
Data Sourced
via MITRE·03:12 PM
Description
Data Sourced
via NVD·04:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Jan 8, 2020
Data Sourced
via Red Hat·09:08 AM
DescriptionSeverityAffected Software
Dec 13, 2025
Data Sourced
via Ubuntu·04:10 PM
RemedyDescriptionSeverityAffected Software
Jun 30, 2026
Data Sourced
via Launchpad·03:47 AM
Description
Data Sourced
via Debian·03:47 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the vulnerability ID?

The vulnerability ID is CVE-2019-19956.

2

What is the severity of CVE-2019-19956?

The severity of CVE-2019-19956 is high, with a severity value of 7.5.

3

How does CVE-2019-19956 affect libxml2?

CVE-2019-19956 affects libxml2 by causing a denial of service due to a memory leak in xmlParseBalancedChunkMemoryRecover in parser.c, which can result in application crashes.

4

How can CVE-2019-19956 be exploited?

CVE-2019-19956 can be exploited by convincing a victim to open a specially crafted file, allowing a remote attacker to trigger the vulnerability and cause application crashes.

5

How can I fix CVE-2019-19956?

To fix CVE-2019-19956, update libxml2 to version 2.9.10 or apply the appropriate patch provided by the vendor.

Company

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