CVE-2019-15903

Advisory lineage Upstream: 0 Downstream: 58
Modified
Published: 04 Sept 2019, 05:59
Last modified:30 May 2025, 19:27

Vulnerability Summary

Overall Risk (default)
medium
40/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
0.2% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

04 Sept 2019, 05:59
Published
Vulnerability first disclosed
30 May 2025, 19:27
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.20%• Percentile: 42%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

  • CWE-776•Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

    The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.

Affected Systems

  • libexpat_project•libexpat

    < 2.2.8

  • python•python

    ≥ 2.7.0, < 2.7.17 | ≥ 3.5.0, < 3.5.8 | ≥ 3.6.0, < 3.6.10 | ≥ 3.7.0, < 3.7.5

References (59)