CVE-2019-20388
published 2020-01-21CVE-2019-20388: xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
PriorityP336high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
3.18%
88.0th percentile
xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
Affected
36 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| 3scale-amp2 | backend-rhel8 | — | — |
| 3scale-amp2 | system-rhel8 | — | — |
| 3scale-amp2 | system-rhel9 | — | — |
| 3scale-amp2 | toolbox-rhel9 | — | — |
| 3scale-amp2 | zync-rhel9 | — | — |
| debian | debian_linux | — | — |
| debian | libxml2 | < libxml2 2.9.10+dfsg-2.1 (bookworm) | libxml2 2.9.10+dfsg-2.1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| msrc | cbl_mariner_1.0_arm | — | — |
| msrc | cbl_mariner_1.0_x64 | — | — |
| msrc | cm1_libxml2_2.9.10-2_on_cbl_mariner_1.0 | — | — |
| nokogiri | nokogiri | < 1.11.4 | 1.11.4 |
| nokogiri | nokogiri | >= 0 < 1.11.4 | 1.11.4 |
| opensuse | leap | — | — |
| oracle | communications_cloud_native_core_network_function_cloud_native_environment | — | — |
| oracle | enterprise_manager_base_platform | — | — |
| oracle | enterprise_manager_base_platform | — | — |
| oracle | enterprise_manager_ops_center | — | — |
| oracle | mysql_workbench | <= 8.0.26 | — |
| oracle | peoplesoft_enterprise_peopletools | — | — |
| oracle | real_user_experience_insight | — | — |
| oracle | real_user_experience_insight | — | — |
| oracle | real_user_experience_insight | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
ghsa7.5HIGH
osv9.1CRITICAL
vendor_ubuntu9.1CRITICAL
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
vendor_redhat7.5HIGH
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GHSA
Nokogiri before 1.11.4 (CRuby implementation only, when the packaged/vendored libxml2 is used) bundles libxml2 2.9.10, which is affected by multiple vulnerabilities addressed in libxml2 2.9.12, includ
ghsa_unreviewed·2026-08-25·CVSS 7.5
CVE-2021-47996 [HIGH] CWE-119 Nokogiri before 1.11.4 (CRuby implementation only, when the packaged/vendored libxml2 is used) bundles libxml2 2.9.10, which is affected by multiple vulnerabilities addressed in libxml2 2.9.12, includ
Nokogiri before 1.11.4 (CRuby implementation only, when the packaged/vendored libxml2 is used) bundles libxml2 2.9.10, which is affected by multiple vulnerabilities addressed in libxml2 2.9.12, including a memory leak in xmlSchemaValidateStream (CVE-2019-20388), a global buffer over-read in xmlEncodeEntitiesInternal (CVE-2020-24977), a heap-based buffer overflow (CVE-2021-3517), and an out-of-bounds read (CVE-2021-3518). Processing crafted XML documents may lead to denial of service, information disclosure, or memory corruption.
GHSA
GHSA-7g45-9xmp-g2w6: xmlSchemaPreRun in xmlschemas
ghsa_unreviewed·2022-05-24
CVE-2019-20388 [HIGH] CWE-401 GHSA-7g45-9xmp-g2w6: xmlSchemaPreRun in xmlschemas
xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
OSV
libxml2 vulnerabilities
osv·2021-06-17·CVSS 9.1
CVE-2017-8872 [CRITICAL] libxml2 vulnerabilities
libxml2 vulnerabilities
Yunho Kim discovered that libxml2 incorrectly handled certain error
conditions. A remote attacker could exploit this with a crafted XML file to
cause a denial of service, or possibly cause libxml2 to expose sensitive
information. This issue only affected Ubuntu 14.04 ESM, and Ubuntu 16.04
ESM. (CVE-2017-8872)
Zhipeng Xie discovered that libxml2 incorrectly handled certain XML
schemas. A remote attacker could possibly use this issue to cause a denial
of service. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM,
and Ubuntu 18.04 LTS. (CVE-2019-20388)
It was discovered that libxml2 incorrectly handled invalid UTF-8 input. A
remote attacker could possibly exploit this with a crafted XML file to
cause libxml2 to crash, resulting in a denial of service. This
OSV
Nokogiri updates packaged dependency on libxml2 from 2.9.10 to 2.9.12
osv·2021-05-17·CVSS 7.5
CVE-2019-20388 [HIGH] Nokogiri updates packaged dependency on libxml2 from 2.9.10 to 2.9.12
Nokogiri updates packaged dependency on libxml2 from 2.9.10 to 2.9.12
### Summary
Nokogiri v1.11.4 updates the vendored libxml2 from v2.9.10 to v2.9.12 which addresses:
- [CVE-2019-20388](https://security.archlinux.org/CVE-2019-20388) (Medium severity)
- [CVE-2020-24977](https://security.archlinux.org/CVE-2020-24977) (Medium severity)
- [CVE-2021-3517](https://security.archlinux.org/CVE-2021-3517) (Medium severity)
- [CVE-2021-3518](https://security.archlinux.org/CVE-2021-3518) (Medium severity)
- [CVE-2021-3537](https://security.archlinux.org/CVE-2021-3537) (Low severity)
- [CVE-2021-3541](https://security.archlinux.org/CVE-2021-3541) (Low severity)
Note that two additional CVEs were addressed upstream but are not relevant to this release. [CVE-2021-3516](https://security.archlinux.or
GHSA
Nokogiri updates packaged dependency on libxml2 from 2.9.10 to 2.9.12
ghsa·2021-05-17·CVSS 7.5
CVE-2019-20388 [HIGH] Nokogiri updates packaged dependency on libxml2 from 2.9.10 to 2.9.12
Nokogiri updates packaged dependency on libxml2 from 2.9.10 to 2.9.12
### Summary
Nokogiri v1.11.4 updates the vendored libxml2 from v2.9.10 to v2.9.12 which addresses:
- [CVE-2019-20388](https://security.archlinux.org/CVE-2019-20388) (Medium severity)
- [CVE-2020-24977](https://security.archlinux.org/CVE-2020-24977) (Medium severity)
- [CVE-2021-3517](https://security.archlinux.org/CVE-2021-3517) (Medium severity)
- [CVE-2021-3518](https://security.archlinux.org/CVE-2021-3518) (Medium severity)
- [CVE-2021-3537](https://security.archlinux.org/CVE-2021-3537) (Low severity)
- [CVE-2021-3541](https://security.archlinux.org/CVE-2021-3541) (Low severity)
Note that two additional CVEs were addressed upstream but are not relevant to this release. [CVE-2021-3516](https://security.archlinux.or
OSV
CVE-2019-20388: xmlSchemaPreRun in xmlschemas
osv·2020-01-21·CVSS 7.5
CVE-2019-20388 [HIGH] CVE-2019-20388: xmlSchemaPreRun in xmlschemas
xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
Red Hat
nokogiri: libxml2: Nokogiri: Memory Corruption via Crafted XML Documents
vendor_redhat·2026-08-25·CVSS 7.5
CVE-2021-47996 [HIGH] CWE-125 nokogiri: libxml2: Nokogiri: Memory Corruption via Crafted XML Documents
nokogiri: libxml2: Nokogiri: Memory Corruption via Crafted XML Documents
Nokogiri before 1.11.4 (CRuby implementation only, when the packaged/vendored libxml2 is used) bundles libxml2 2.9.10, which is affected by multiple vulnerabilities addressed in libxml2 2.9.12, including a memory leak in xmlSchemaValidateStream (CVE-2019-20388), a global buffer over-read in xmlEncodeEntitiesInternal (CVE-2020-24977), a heap-based buffer overflow (CVE-2021-3517), and an out-of-bounds read (CVE-2021-3518). Processing crafted XML documents may lead to denial of service, information disclosure, or memory corruption.
A flaw was found in Nokogiri, specifically within its bundled libxml2 library. A remote attacker could exploit multiple vulnerabilities, including memory leaks, buffer over-reads, heap-based
CISA ICS
Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
cisa_ics·2023-12-14
Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
ICS Advisory
##
Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
Release DateDecember 14, 2023
Alert CodeICSA-23-348-10
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1
- Vulnerabilities: Improper Restriction of XML External Entity Reference, Time-of-check Time-of-use (TOCTOU) Race Condition, Command Injection, Miss
CISA ICS
Hitachi Energy APM Edge (Update A)
cisa_ics·2021-12-02·CVSS 9.1
[CRITICAL] Hitachi Energy APM Edge (Update A)
## Archived Content In an effort to keep CISA.gov current, the archive contains outdated information that may not reflect current policy or programs.
ICS Advisory
##
Hitachi Energy APM Edge (Update A)
Last RevisedOctober 18, 2022
Alert CodeICSA-21-336-06
## 1. EXECUTIVE SUMMARY
- CVSS v3 8.2
- ATTENTION: Low attack complexity
- Vendor: Hitachi Energy
- Equipment: Transformer Asset Performance Management (APM) Edge
- Vulnerability: Reliance on Uncontrolled Component
## 2. UPDATE OR REPOSTED INFORMATION
This updated advisory is a follow-up to the original advisory titled “ICSA-21-336-06 Hitachi Energy APM Edge” that was published December 02, 2021, on the ICS webpage on cisa.gov/ics.
## 3. RISK EVALUATION
Successful exploitation of thi
Ubuntu
libxml2 vulnerabilities
vendor_ubuntu·2021-06-17·CVSS 9.1
CVE-2021-3516 [CRITICAL] libxml2 vulnerabilities
Title: libxml2 vulnerabilities
Summary: Several security issues were fixed in libxml2.
Yunho Kim discovered that libxml2 incorrectly handled certain error
conditions. A remote attacker could exploit this with a crafted XML file to
cause a denial of service, or possibly cause libxml2 to expose sensitive
information. This issue only affected Ubuntu 14.04 ESM, and Ubuntu 16.04
ESM. (CVE-2017-8872)
Zhipeng Xie discovered that libxml2 incorrectly handled certain XML
schemas. A remote attacker could possibly use this issue to cause a denial
of service. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM,
and Ubuntu 18.04 LTS. (CVE-2019-20388)
It was discovered that libxml2 incorrectly handled invalid UTF-8 input. A
remote attacker could possibly exploit this with a crafted XML file t
Red Hat
libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c
vendor_redhat·2020-01-21·CVSS 7.5
CVE-2019-20388 [HIGH] CWE-401 libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c
libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c
xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
A memory leak was found in the xmlSchemaValidateStream function of libxml2. Applications that use this library may be vulnerable to memory not being freed leading to a denial of service. System availability is the highest threat from this vulnerability.
Package: system (Red Hat 3scale API Management Platform 2) - Affected
Package: libxml2 (Red Hat Enterprise Linux 5) - Not affected
Package: libxml2 (Red Hat Enterprise Linux 6) - Not affected
Microsoft
xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
vendor_msrc·2020-01-14·CVSS 7.5
CVE-2019-20388 [HIGH] CWE-401 xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
mitre: mitre
Customer Action Required: Yes
Remediation: CBL-M
Debian
CVE-2019-20388: libxml2 - xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStr...
vendor_debian·2019·CVSS 7.5
CVE-2019-20388 [HIGH] CVE-2019-20388: libxml2 - xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStr...
xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
Scope: local
bookworm: resolved (fixed in 2.9.10+dfsg-2.1)
bullseye: resolved (fixed in 2.9.10+dfsg-2.1)
forky: resolved (fixed in 2.9.10+dfsg-2.1)
sid: resolved (fixed in 2.9.10+dfsg-2.1)
trixie: resolved (fixed in 2.9.10+dfsg-2.1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2021-47996 nokogiri: libxml2: Nokogiri: Memory Corruption via Crafted XML Documents
bugzilla·2026-08-25·CVSS 7.5
CVE-2021-47996 [HIGH] CVE-2021-47996 nokogiri: libxml2: Nokogiri: Memory Corruption via Crafted XML Documents
CVE-2021-47996 nokogiri: libxml2: Nokogiri: Memory Corruption via Crafted XML Documents
Nokogiri before 1.11.4 (CRuby implementation only, when the packaged/vendored libxml2 is used) bundles libxml2 2.9.10, which is affected by multiple vulnerabilities addressed in libxml2 2.9.12, including a memory leak in xmlSchemaValidateStream (CVE-2019-20388), a global buffer over-read in xmlEncodeEntitiesInternal (CVE-2020-24977), a heap-based buffer overflow (CVE-2021-3517), and an out-of-bounds read (CVE-2021-3518). Processing crafted XML documents may lead to denial of service, information disclosure, or memory corruption.
Bugzilla
CVE-2019-20388 libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c
bugzilla·2020-02-06·CVSS 7.5
CVE-2019-20388 [HIGH] CVE-2019-20388 libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c
CVE-2019-20388 libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c
xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
Reference and upstream commit:
https://gitlab.gnome.org/GNOME/libxml2/merge_requests/68
Discussion:
Created libxml2 tracking bugs for this issue:
Affects: fedora-all [bug 1799736]
Created mingw-libxml2 tracking bugs for this issue:
Affects: epel-7 [bug 1799739]
Affects: fedora-all [bug 1799738]
---
Function xmlSchemaValidateStream() in xmlschemas.c calls xmlSchemaSAXPlug(), which calls xmlSchemaPreRun().
xmlSchemaPreRun() sets `vctxt->xsiAssemble = 0;`, then if vctxt->schema is NULL it sets `vctxt->xsiAssemble = 1;` and it allocates a new schema, storing the pointer in vctxt->schema.
Function xmlSchemaPostRun() is
Bugzilla
CVE-2019-20388 mingw-libxml2: libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c [fedora-all]
bugzilla·2020-02-06·CVSS 7.5
CVE-2019-20388 [HIGH] CVE-2019-20388 mingw-libxml2: libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c [fedora-all]
CVE-2019-20388 mingw-libxml2: libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multip
Bugzilla
CVE-2019-20388 libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c [fedora-all]
bugzilla·2020-02-06·CVSS 7.5
CVE-2019-20388 [HIGH] CVE-2019-20388 libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c [fedora-all]
CVE-2019-20388 libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported ve
Bugzilla
CVE-2019-20388 mingw-libxml2: libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c [epel-7]
bugzilla·2020-02-06·CVSS 7.5
CVE-2019-20388 [HIGH] CVE-2019-20388 mingw-libxml2: libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c [epel-7]
CVE-2019-20388 mingw-libxml2: libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c [epel-7]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of epel-7.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
Discussion:
Use the following template
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00047.htmlhttps://gitlab.gnome.org/GNOME/libxml2/merge_requests/68https://lists.debian.org/debian-lts-announce/2020/09/msg00009.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/545SPOI3ZPPNPX4TFRIVE4JVRTJRKULL/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R55ZR52RMBX24TQTWHCIWKJVRV6YAWI/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDPF3AAVKUAKDYFMFKSIQSVVS3EEFPQH/https://security.gentoo.org/glsa/202010-04https://security.netapp.com/advisory/ntap-20200702-0005/https://www.oracle.com/security-alerts/cpuapr2022.htmlhttps://www.oracle.com/security-alerts/cpujul2020.htmlhttps://www.oracle.com/security-alerts/cpujul2022.htmlhttps://www.oracle.com/security-alerts/cpuoct2021.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-05/msg00047.htmlhttps://gitlab.gnome.org/GNOME/libxml2/merge_requests/68https://lists.debian.org/debian-lts-announce/2020/09/msg00009.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/545SPOI3ZPPNPX4TFRIVE4JVRTJRKULL/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R55ZR52RMBX24TQTWHCIWKJVRV6YAWI/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDPF3AAVKUAKDYFMFKSIQSVVS3EEFPQH/https://security.gentoo.org/glsa/202010-04https://security.netapp.com/advisory/ntap-20200702-0005/https://www.oracle.com/security-alerts/cpuapr2022.htmlhttps://www.oracle.com/security-alerts/cpujul2020.htmlhttps://www.oracle.com/security-alerts/cpujul2022.htmlhttps://www.oracle.com/security-alerts/cpuoct2021.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html
2020-01-21
Published