CVE-2019-15903 json
In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to...
published 7y ago modified 26d ago also EUVD-2019-6813 , JLSEC-2025-41
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 6.6%
- EPSS 6.6% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known
Summary
In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.
Patch / fix
- julia Expat_jll 2.2.10+0
- Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
- Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
- Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
- expat Debian 14, Debian 13, Debian 12 2.2.7-2
- firefox-esr Debian 14, Debian 13, Debian 12 68.2.0esr-1
- thunderbird Debian 14, Debian 13, Debian 12 1:68.2.1-1
debian advisories DEBIAN-CVE-2019-15903
- expat Ubuntu 16.04 LTS 2.1.0-7ubuntu0.16.04.5
- expat Ubuntu 18.04 LTS 2.2.5-3ubuntu0.2
- firefox Ubuntu 16.04 LTS 70.0+build2-0ubuntu0.16.04.1
- firefox Ubuntu 18.04 LTS 70.0+build2-0ubuntu0.18.04.1
- firefox Ubuntu 20.04 LTS 70.0+build2-0ubuntu1
- thunderbird Ubuntu 16.04 LTS 1:68.7.0+build1-0ubuntu0.16.04.2
- thunderbird Ubuntu 18.04 LTS 1:68.2.1+build1-0ubuntu0.18.04.1
- chromium-browser Ubuntu 16.04 LTS 78.0.3904.70-0ubuntu0.16.04.2
ubuntu advisories UBUNTU-CVE-2019-15903
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- thunderbird RHEL 6 68.2.0-2.el6_10
- thunderbird RHEL 7 68.2.0-1.el7_7
- thunderbird RHEL 8 68.2.0-1.el8_0
- firefox RHEL 7 68.2.0-1.el7_7
- firefox RHEL 8 68.2.0-2.el8_0
- jbcs-httpd24-curl jboss core services 1 7.64.1-36.jbcs.el6
- jbcs-httpd24-curl jboss core services 1 7.64.1-36.jbcs.el7
- jbcs-httpd24-httpd jboss core services 1 2.4.37-57.jbcs.el6
red hat advisories RHSA-2025:22871RHSA-2019:3756RHSA-2019:3210RHSA-2019:3237RHSA-2019:3193RHSA-2019:3196
- expat Linux Micro 6.1 2.7.1-slfo.1.1_1.1
- expat Linux Micro 6.0 2.7.1-1.1
- python36 SLES for SAP 12 SP5, SLES 12 SP5 3.6.10-4.3.5
- python36-base SLES for SAP 12 SP5, SLES 12 SP5 3.6.10-4.3.5
- python3 SLE Module for Basesystem 15 SP1, SLE Module for Basesystem 15 3.6.10-3.42.2
- python3-base SLE Module for Development Tools 15 SP1, SLE Module for Development Tools 15, SLE Module for Basesystem 15 SP1 +1 more 3.6.10-3.42.2
- MozillaThunderbird SLE Workstation Extension 15 SP1, SLE Workstation Extension 15 68.2.1-3.58.1
- MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +17 more 68.2.0-109.95.2
suse advisories SUSE-SU-2025:20311-1SUSE-SU-2025:20207-1SUSE-SU-2020:0302-1SUSE-SU-2019:14246-1SUSE-SU-2020:0114-1SUSE-SU-2019:2912-1
- firefox-esr openSUSE Tumbleweed 128.5.1-1.1
- MozillaFirefox openSUSE Tumbleweed 92.0-1.2
- MozillaThunderbird openSUSE Tumbleweed 91.1.1-1.1
- chromium openSUSE Tumbleweed 93.0.4577.82-1.1
- expat openSUSE Tumbleweed 2.4.1-1.2
- python36 openSUSE Tumbleweed 3.6.15-1.1
- chromium openSUSE Tumbleweed 113.0.5672.92-1.1
- python3 openSUSE Leap 15.1 3.6.10-lp151.6.7.1
opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10600-1openSUSE-SU-2024:10601-1openSUSE-SU-2024:10681-1openSUSE-SU-2024:10748-1openSUSE-SU-2024:11284-1
- expat Rocky Linux 8 2.2.5-4.el8
rocky linux advisories RLSA-2020:4484
- expat Alpine 3.24, Alpine 3.23, Alpine 3.22 +15 more 2.2.7-r1
- firefox Alpine 3.23, Alpine 3.22, Alpine 3.21 +9 more 70.0-r0
- python2 Alpine 3.15, Alpine 3.14, Alpine 3.13 +4 more 2.7.17-r0
- librewolf Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 70.0-r0
- firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +10 more 68.2.0-r0
- python2-tkinter Alpine 3.11, Alpine 3.10 2.7.17-r0
alpine advisories ALPINE-CVE-2019-15903
Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- github.com/libexpat/libexpat@c20b758 commit
- github.com/libexpat/libexpat#318 pull request
Is CVE-2019-15903 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerVendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2019-15903 updated cvss 7.5
expat: heap-based buffer over-read via crafted XML input
-
Red Hat Enterprise Linux 5 expat, firefox, xmlrpc-c, thunderbird Red Hat Enterprise Linux 6 expat, firefox, compat-expat1affected: workaround, no fix planned “Out of support scope”
-
Red Hat Enterprise Linux 8 mingw-expat, mingw32-expat, mingw64-expataffected: workaround, no fix available
-
Red Hat JBoss Enterprise Application Platform 6 httpd, mod_ssl, mod_ldap, httpd-tools, httpd-manual Red Hat JBoss Enterprise Web Server 2 jbcs-httpd24, jbcs-httpd24-runtimeaffected: workaround, no fix planned “Out of support scope”
-
Red Hat OpenShift Do 1 openshiftdo/odo-init-image-rhel7 1.1.3-2fixed: vendor fix RHSA-2021:0949
-
Red Hat Enterprise Linux AppStream (v. 8) firefox 68.2.0-2.el8_0, thunderbird 68.2.0-1.el8_0fixed: vendor fix RHSA-2019:3196
-
Red Hat Enterprise Linux BaseOS (v. 8) expat 2.2.5-4.el8fixed: vendor fix RHSA-2020:4484
-
Red Hat Enterprise Linux BaseOS AUS (v. 8.2) expat 2.2.10-1.el8_2fixed: vendor fix RHSA-2025:22871
-
Red Hat Enterprise Linux Client (v. 7) expat 2.1.0-12.el7, firefox 68.2.0-1.el7_7, thunderbird 68.2.0-1.el7_7 Red Hat Enterprise Linux Client Optional (v. 7) firefox 68.2.0-1.el7_7fixed: vendor fix RHSA-2019:3193
show 10 moreshow fewer
-
Red Hat Enterprise Linux ComputeNode (v. 7) expat 2.1.0-12.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) expat-devel 2.1.0-12.el7, expat-static 2.1.0-12.el7, expat-debuginfo 2.1.0-12.el7fixed: vendor fix RHSA-2020:3952
-
Red Hat Enterprise Linux Desktop (v. 6) thunderbird 68.2.0-2.el6_10fixed: vendor fix RHSA-2019:3756
-
Red Hat Enterprise Linux Server (v. 7) expat 2.1.0-12.el7, firefox 68.2.0-1.el7_7fixed: vendor fix RHSA-2019:3193
-
Red Hat Enterprise Linux Server Optional (v. 6) thunderbird 68.2.0-2.el6_10fixed: vendor fix RHSA-2019:3756
-
Red Hat Enterprise Linux Server Optional (v. 7) firefox 68.2.0-1.el7_7, thunderbird 68.2.0-1.el7_7fixed: vendor fix RHSA-2019:3193
-
Red Hat Enterprise Linux Workstation (v. 6) thunderbird 68.2.0-2.el6_10fixed: vendor fix RHSA-2019:3756
-
Red Hat Enterprise Linux Workstation (v. 7) expat 2.1.0-12.el7, firefox 68.2.0-1.el7_7, thunderbird 68.2.0-1.el7_7 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 68.2.0-1.el7_7fixed: vendor fix RHSA-2019:3193
-
Red Hat JBoss Core Servicesfixed: vendor fix RHSA-2020:2646
-
Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-curl 7.64.1-36.jbcs.el6, jbcs-httpd24-httpd 2.4.37-57.jbcs.el6, jbcs-httpd24-mod_md 2.0.8-24.jbcs.el6, jbcs-httpd24-libcurl 7.64.1-36.jbcs.el6, jbcs-httpd24-mod_ssl 2.4.37-57.jbcs.el6, jbcs-httpd24-nghttp2 1.39.2-25.jbcs.el6, +12 more Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-curl 7.64.1-36.jbcs.el7, jbcs-httpd24-httpd 2.4.37-57.jbcs.el7, jbcs-httpd24-mod_md 2.0.8-24.jbcs.el7, jbcs-httpd24-libcurl 7.64.1-36.jbcs.el7, jbcs-httpd24-mod_ssl 2.4.37-57.jbcs.el7, jbcs-httpd24-nghttp2 1.39.2-25.jbcs.el7, +13 morefixed: vendor fix RHSA-2020:2644
-
Red Hat Enterprise Linux 5 xulrunner Red Hat Enterprise Linux 6 xulrunner Red Hat Enterprise Linux 7 python, tkinter, xulrunner, python-libs, python-test, python-tools Red Hat Enterprise Linux 8 python2, python3, python2-libs, python2-test, python3-idle, python3-libs, +5 more Red Hat Enterprise Linux BaseOS AUS (v. 8.2) expat 2.2.10-1.el8_2not affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
cisa ICSA-23-348-10 updated cvss 7.5
Siemens SIMATIC S7-1500
-
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5affected: fixed in V3.1.5, mitigation support.industry.siemens.com
Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
6.64% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/libexpat/libexpat/issues/317 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| julia | Expat_jll | <2.2.10+0 |
2.2.10+0 |
Affected products
- Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
- Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
- Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Classification
References
-
github.com
/libexpat/libexpat/pull/318
issue-tracking, patch, third-party-advisory, web
-
github.com
/libexpat/libexpat/commit/c20b758c332d9a13afbbb276d30db1d183a85d43
patch, third-party-advisory, web
-
github.com
/libexpat/libexpat/issues/317
exploit, issue-tracking, third-party-advisory, web
-
usn.ubuntu.com
/4132-1/
vendor-advisory
-
usn.ubuntu.com
/4132-2/
vendor-advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/BDUTI5TVQWIGGQXPEVI4T2ENHFSBMIBP/
vendor-advisory, web
-
debian.org
/security/2019/dsa-4530
vendor-advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/A4TZKPJFTURRLXIGLB34WVKQ5HGY6JJA/
vendor-advisory, web
-
lists.opensuse.org
/opensuse-security-announce/2019-09/msg00081.html
vendor-advisory, mailing-list, third-party-advisory, web
-
lists.opensuse.org
/opensuse-security-announce/2019-09/msg00080.html
vendor-advisory, mailing-list, third-party-advisory, web
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/S26LGXXQ7YF2BP3RGOWELBFKM6BHF6UG/
vendor-advisory, web
-
usn.ubuntu.com
/4165-1/
vendor-advisory
-
debian.org
/security/2019/dsa-4549
vendor-advisory
-
access.redhat.com
/errata/RHSA-2019:3210
vendor-advisory, third-party-advisory, web
-
access.redhat.com
/errata/RHSA-2019:3237
vendor-advisory, third-party-advisory, web
-
lists.opensuse.org
/opensuse-security-announce/2019-11/msg00000.html
vendor-advisory, mailing-list, third-party-advisory, web
-
lists.opensuse.org
/opensuse-security-announce/2019-11/msg00002.html
vendor-advisory, mailing-list, third-party-advisory, web
-
lists.opensuse.org
/opensuse-security-announce/2019-11/msg00003.html
vendor-advisory, mailing-list, third-party-advisory, web
-
access.redhat.com
/errata/RHSA-2019:3756
vendor-advisory, third-party-advisory, web
-
lists.opensuse.org
/opensuse-security-announce/2019-11/msg00013.html
vendor-advisory, mailing-list, third-party-advisory, web
-
lists.opensuse.org
/opensuse-security-announce/2019-11/msg00016.html
vendor-advisory, mailing-list, third-party-advisory, web
-
lists.opensuse.org
/opensuse-security-announce/2019-11/msg00018.html
vendor-advisory, mailing-list, third-party-advisory, web
-
lists.opensuse.org
/opensuse-security-announce/2019-11/msg00017.html
vendor-advisory, mailing-list, third-party-advisory, web
-
lists.opensuse.org
/opensuse-security-announce/2019-11/msg00019.html
vendor-advisory, mailing-list, third-party-advisory, web
-
debian.org
/security/2019/dsa-4571
vendor-advisory
-
security.gentoo.org
/glsa/201911-08
vendor-advisory, third-party-advisory, web
-
usn.ubuntu.com
/4202-1/
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2020-01/msg00008.html
vendor-advisory, mailing-list, third-party-advisory, web
-
lists.opensuse.org
/opensuse-security-announce/2020-01/msg00040.html
vendor-advisory, mailing-list, third-party-advisory, web
-
usn.ubuntu.com
/4335-1/
vendor-advisory
-
seclists.org
/bugtraq/2019/Sep/30
mailing-list, third-party-advisory, web
-
seclists.org
/bugtraq/2019/Sep/37
mailing-list, third-party-advisory, web
-
seclists.org
/bugtraq/2019/Oct/29
mailing-list, third-party-advisory, web
-
seclists.org
/bugtraq/2019/Nov/1
mailing-list, third-party-advisory, web
-
lists.debian.org
/debian-lts-announce/2019/11/msg00006.html
mailing-list, third-party-advisory, web
-
seclists.org
/bugtraq/2019/Nov/24
mailing-list, third-party-advisory, web
-
lists.debian.org
/debian-lts-announce/2019/11/msg00017.html
mailing-list, third-party-advisory, web
-
seclists.org
/bugtraq/2019/Dec/17
mailing-list, third-party-advisory, web
-
seclists.org
/bugtraq/2019/Dec/21
mailing-list, third-party-advisory, web
-
seclists.org
/bugtraq/2019/Dec/23
mailing-list, third-party-advisory, web
-
seclists.org
/fulldisclosure/2019/Dec/23
mailing-list, third-party-advisory, web
-
packetstormsecurity.com
/files/154503/Slackware-Security-Advisory-expat-Updates.html
third-party-advisory, vdb-entry, web
-
packetstormsecurity.com
/files/154927/Slackware-Security-Advisory-python-Updates.html
third-party-advisory, vdb-entry, web
-
packetstormsecurity.com
/files/154947/Slackware-Security-Advisory-mozilla-firefox-Updates.html
third-party-advisory, vdb-entry, web
-
seclists.org
/fulldisclosure/2019/Dec/26
mailing-list, third-party-advisory, web
-
seclists.org
/fulldisclosure/2019/Dec/27
mailing-list, third-party-advisory, web
-
seclists.org
/fulldisclosure/2019/Dec/30
mailing-list, third-party-advisory, web
-
github.com
/libexpat/libexpat/issues/342
third-party-advisory, web
Sources
- CVE List CVE-2019-15903
- NVD CVE-2019-15903
- OSV JLSEC-2025-41
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.