PT-2019-5584 · Libxml2+5 · Libxml2+5

Published 2019-08-07 · Updated 2025-12-03 · CVE-2019-19956

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions libxml2 versions prior to 2.9.10

Description The issue is related to a memory leak in the xmlParseBalancedChunkMemoryRecover function in the parser.c file of the libxml2 library. This memory leak is associated with newDoc->oldNs. The vulnerability can be exploited by a remote attacker to cause a denial of service.

Recommendations For versions prior to 2.9.10, update to version 2.9.10 or later to resolve the memory leak issue. As a temporary workaround, consider restricting the use of the xmlParseBalancedChunkMemoryRecover function in parser.c until a patch is available.

Fix

Missing Release of Resource after Effective Lifetime

Memory Leak

Weakness Enumeration

CWE-772

CWE-401

Related Identifiers

ALT-PU-2019-3074

ALT-PU-2019-3079

BDU:2020-04513

CESA-2020_3996

CESA-2020_4479

CVE-2019-19956

DLA-2048-1

DLA-2369-1

MGASA-2020-0020

MGASA-2020-0271

OESA-2022-1582

OPENSUSE-SU-2020:0681-1

OPENSUSE-SU-2020:0781-1

OPENSUSE-SU-2020_0681-1

OPENSUSE-SU-2020_0781-1

OPENSUSE-SU-2024:11016-1

RHSA-2020:2644

RHSA-2020:3996

RHSA-2020:4479

RHSA-2020_3996

RHSA-2020_4479

SUSE-SU-2020:1299-1

SUSE-SU-2020:1532-1

SUSE-SU-2020:1532-2

SUSE-SU-2020:2609-1

SUSE-SU-2020_1299-1

SUSE-SU-2020_1532-1

SUSE-SU-2020_1532-2

SUSE-SU-2020_2609-1

SUSE-SU-2021:14729-1

SUSE-SU-2021_14729-1

USN-4274-1

Affected Products

Alt Linux

Centos

Red Hat

Suse

Ubuntu

Libxml2

References · 96

• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00047.html · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2019-19956 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R55ZR52RMBX24TQTWHCIWKJVRV6YAWI · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2020-0271 · Vendor Advisory
• https://wiki.astralinux.ru/pages/viewpage.action?pageId=47416144 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-19956 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2020:0681-1 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/681760 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDPF3AAVKUAKDYFMFKSIQSVVS3EEFPQH · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-19956 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-7595 · Vendor Advisory
• https://debian.org/lts/security/2019/dla-2048 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20211019SE81 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2369-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2020:0781-1 · Vendor Advisory