High severity7.5NVD Advisory· Published Jul 25, 2017· Updated Jun 17, 2026

CVE-2017-9233

Description

XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Libexpat Project/Libexpat
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
Range: <=2.2.0
Python (programming language)/Python
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Range: >=2.7.0,<2.7.15
Debian/linux3 versions
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
osv-coords56 versions
pkg:rpm/opensuse/expat&distro=openSUSE%20Tumbleweed pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP2 pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP3 pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4 pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2 pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3 pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20Raspberry%20Pi%2012%20SP2 pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4 pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4 pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP2 pkg:rpm/suse/expat&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP3 pkg:rpm/suse/expat&distro=SUSE%20Studio%20Onsite%201.3 pkg:rpm/suse/python3-base&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/python3-base&distro=SUSE%20Enterprise%20Storage%205 pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4 pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2012 pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSS pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSS pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1 pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4 pkg:rpm/suse/python3-base&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/python3-base&distro=SUSE%20OpenStack%20Cloud%207 pkg:rpm/suse/python3-base&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/python3-base&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/python3&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/python3&distro=SUSE%20Enterprise%20Storage%205 pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4 pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2012 pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSS pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSS pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1 pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4 pkg:rpm/suse/python3&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/python3&distro=SUSE%20OpenStack%20Cloud%207 pkg:rpm/suse/python3&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/python3&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208
< 2.4.1-1.2+ 55 more
- (no CPE)range: < 2.4.1-1.2
- (no CPE)range: < 2.1.0-21.3.1
- (no CPE)range: < 2.1.0-21.3.1
- (no CPE)range: < 2.0.1-88.42.3.2
- (no CPE)range: < 2.1.0-21.3.1
- (no CPE)range: < 2.1.0-21.3.1
- (no CPE)range: < 2.1.0-21.3.1
- (no CPE)range: < 2.0.1-88.42.3.2
- (no CPE)range: < 2.1.0-21.3.1
- (no CPE)range: < 2.1.0-21.3.1
- (no CPE)range: < 2.0.1-88.42.3.2
- (no CPE)range: < 2.1.0-21.3.1
- (no CPE)range: < 2.1.0-21.3.1
- (no CPE)range: < 2.0.1-88.42.3.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.2
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3
- (no CPE)range: < 3.4.10-25.39.3

Patches

Vulnerability mechanics

References

libexpat.github.io/doc/cve-2017-9233/nvdExploitTechnical DescriptionVendor Advisory
www.debian.org/security/2017/dsa-3898nvdThird Party Advisory
www.securityfocus.com/bid/99276nvdThird Party AdvisoryVDB Entry
www.securitytracker.com/id/1039427nvdThird Party AdvisoryVDB Entry
github.com/libexpat/libexpat/blob/master/expat/ChangesnvdRelease NotesThird Party Advisory
support.apple.com/HT208112nvdThird Party Advisory
support.apple.com/HT208113nvdThird Party Advisory
support.apple.com/HT208115nvdThird Party Advisory
support.apple.com/HT208144nvdThird Party Advisory
support.f5.com/csp/article/K03244804nvdThird Party Advisory
www.openwall.com/lists/oss-security/2017/06/17/7nvdMailing ListVDB Entry
lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3Envd
lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3Envd

News mentions

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cvss	0.488
epss	0.007
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000