CVE-2023-52425
libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.
02 Description
libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 2.14% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 81.7% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-10-15.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2024-02-04 00:00Z2 YR AGO
- Last updated
- 2026-10-15 00:16Z14 DAYS AGO
- Reserved
- 2024-02-04
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-400Uncontrolled Resource ConsumptionClass
- Data version
- 5.2
- Document digest
- b30ea0462c69a21fb63ef68467957c82f3e05466a6a5707719ee374843449fc3
05 Affected products
06 References
- github.comhttps://github.com/libexpat/libexpat/pull/789
- lists.fedoraproject.orgFEDORA-2024-fbe1f0c1aahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/
- lists.fedoraproject.orgFEDORA-2024-b8656bc059https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNUBSGZFEZOBHJFTAD42SAN4ATW2VEMV/
- lists.debian.org[debian-lts-announce] 20240409 [SECURITY] [DLA 3783-1] expat security updatehttps://lists.debian.org/debian-lts-announce/2024/04/msg00006.html
- www.openwall.com[oss-security] 20240320 Security fixes in Python 3.10.14, 3.9.19, and 3.8.19 (CVE-2023-6597 & CVE-2024-0450)http://www.openwall.com/lists/oss-security/2024/03/20/5
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20240614-0003/
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/09/msg00036.html
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-784301.html
07 Fixed in
AlmaLinux 8
- expat Fixed in 2.2.5-11.el8_9.1
- expat-devel Fixed in 2.2.5-11.el8_9.1
- xmlrpc-c Fixed in 1.51.0-9.el8_10
- xmlrpc-c-c++ Fixed in 1.51.0-9.el8_10
- xmlrpc-c-client Fixed in 1.51.0-9.el8_10
- xmlrpc-c-client++ Fixed in 1.51.0-9.el8_10
- xmlrpc-c-devel Fixed in 1.51.0-9.el8_10
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- expat Fixed in 2.5.0-1.el9_3.1
- expat-devel Fixed in 2.5.0-1.el9_3.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- expat Fixed in 2.2.5-11.el8_9.1
- expat-devel Fixed in 2.2.5-11.el8_9.1
- xmlrpc-c Fixed in 1.51.0-9.el8_10
- xmlrpc-c-c++ Fixed in 1.51.0-9.el8_10
- xmlrpc-c-client Fixed in 1.51.0-9.el8_10
- xmlrpc-c-client++ Fixed in 1.51.0-9.el8_10
- xmlrpc-c-devel Fixed in 1.51.0-9.el8_10
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- expat Fixed in 2.5.0-1.el9_3.1
- expat-devel Fixed in 2.5.0-1.el9_3.1
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- expat Fixed in 2.5.0-1+deb12u2
- libxmltok No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- expat Fixed in 2.6.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- expat Fixed in 2.6.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- cadaver No fix yet
- insighttoolkit4 No fix yet
- matanza No fix yet
- tdom No fix yet
- wbxml2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- cadaver No fix yet
- insighttoolkit4 No fix yet
- matanza No fix yet
- tdom No fix yet
- vnc4 No fix yet
- wbxml2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- cadaver No fix yet
- insighttoolkit4 No fix yet
- matanza No fix yet
- tdom No fix yet
- wbxml2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- cadaver No fix yet
- expat Fixed in 2.4.7-1ubuntu0.3
- insighttoolkit4 No fix yet
- libxmltok No fix yet
- matanza No fix yet
- tdom No fix yet
- wbxml2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- cadaver No fix yet
- expat Fixed in 2.6.0-1
- libxmltok No fix yet
- matanza No fix yet
- tdom No fix yet
- wbxml2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- cadaver No fix yet
- matanza No fix yet
- swish-e No fix yet
- tdom No fix yet
- wbxml2 No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- cadaver No fix yet
- matanza No fix yet
- tdom No fix yet
- wbxml2 No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- cadaver No fix yet
- matanza No fix yet
- swish-e No fix yet
- tdom No fix yet
- wbxml2 No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- coin3 No fix yet
- expat No fix yet
- vnc4 No fix yet
- vtk No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- ayttm No fix yet
- cableswig No fix yet
- coin3 No fix yet
- expat No fix yet
- libxmltok No fix yet
- swish-e No fix yet
- vnc4 No fix yet
- vtk No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- coin3 No fix yet
- expat No fix yet
- libxmltok No fix yet
- swish-e No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- expat No fix yet
- libxmltok No fix yet
- swish-e No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 22.04 LTS
- swish-e No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 24.04 LTS
- swish-e No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 26.04 LTS
- swish-e No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.