Executive Summary

Title Expat: Multiple vulnerabilities
Name GLSA-201911-08 First vendor Publication 2019-11-25
Vendor Gentoo Last vendor Modification 2019-11-25
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:N/A:C)
Cvss Base Score 7.8 Attack Range Network
Cvss Impact Score 6.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores



Multiple vulnerabilities have been found in Expat, the worst of which could result in a Denial of Service condition.


Expat is a set of XML parsing libraries.


Multiple vulnerabilities have been discovered in Expat. Please review the CVE identifiers referenced below for details.


Please review the referenced CVE identifiers for details.


There is no known workaround at this time.


All Expat users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/expat-2.2.8"


[ 1 ] CVE-2018-20843 : https://nvd.nist.gov/vuln/detail/CVE-2018-20843
[ 2 ] CVE-2019-15903 : https://nvd.nist.gov/vuln/detail/CVE-2019-15903


This GLSA and any updates to it are available for viewing at the Gentoo Security Website:


Original Source

Url : http://security.gentoo.org/glsa/glsa-201911-08.xml

CWE : Common Weakness Enumeration

% Id Name
33 % CWE-776 Unrestricted Recursive Entity References in DTDs ('XML Bomb')
33 % CWE-611 Information Leak Through XML External Entity File Disclosure
33 % CWE-125 Out-of-bounds Read

CPE : Common Platform Enumeration

Application 22
Application 22

Snort® IPS/IDS

Date Description
2019-12-17 libexpat internal entity heap over-read attempt
RuleID : 52254 - Revision : 1 - Type : FILE-OTHER
2019-12-17 libexpat internal entity heap over-read attempt
RuleID : 52253 - Revision : 1 - Type : FILE-OTHER

Alert History

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Date Informations
2019-11-25 05:18:57
  • First insertion