libexpat up to 2.2.7 XML Parser xml external entity reference

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in libexpat up to 2.2.7 and classified as critical. This impacts an unknown function of the component XML Parser. Performing a manipulation results in xml external entity reference. This vulnerability is cataloged as CVE-2019-15903. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in libexpat up to 2.2.7. This affects an unknown part of the component XML Parser. The manipulation with an unknown input leads to a xml external entity reference vulnerability. CWE is classifying the issue as CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was shared 09/04/2019 (Website). The advisory is shared at seclists.org. This vulnerability is uniquely identified as CVE-2019-15903 since 09/04/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 213995 (Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : xmltok library vulnerabilities (USN-7199-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.2.8 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (213995). The entry VDB-153488 is related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 213995
Nessus Name: Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : xmltok library vulnerabilities (USN-7199-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libexpat 2.2.8
Patch: github.com

Timelineinfo

09/04/2019 🔍
09/04/2019 +0 days 🔍
09/05/2019 +1 days 🔍
05/30/2025 +2094 days 🔍

Sourcesinfo

Product: github.com

Advisory: RHSA-2019:3210
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-15903 (🔍)
GCVE (CVE): GCVE-0-2019-15903
GCVE (VulDB): GCVE-100-141249
See also: 🔍

Entryinfo

Created: 09/05/2019 09:20
Updated: 05/30/2025 23:29
Changes: 09/05/2019 09:20 (55), 08/12/2020 15:14 (2), 12/11/2023 15:57 (5), 12/11/2023 16:02 (1), 01/13/2025 16:42 (18), 05/30/2025 23:29 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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