Executive Summary

Title Expat vulnerability
Name USN-4132-2 First vendor Publication 2019-09-12
Vendor Ubuntu Last vendor Modification 2019-09-12
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:P)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 ESM - Ubuntu 12.04 ESM


Expat could be made to expose sensitive information if it received a specially crafted XML file.

Software Description: - expat: XML parsing C library


USN-4132-1 fixed a vulnerability in Expat. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that Expat incorrectly handled certain XML files.
An attacker could possibly use this issue to expose sensitive information.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.04 ESM:
lib64expat1 2.1.0-4ubuntu1.4+esm2
libexpat1 2.1.0-4ubuntu1.4+esm2

Ubuntu 12.04 ESM:
lib64expat1 2.0.1-7.2ubuntu1.7
libexpat1 2.0.1-7.2ubuntu1.7

In general, a standard system update will make all the necessary changes.


Original Source

Url : http://www.ubuntu.com/usn/USN-4132-2

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-776 Unrestricted Recursive Entity References in DTDs ('XML Bomb')
50 % CWE-125 Out-of-bounds Read

CPE : Common Platform Enumeration

Application 12

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

If you want to see full details history, please login or register.
Date Informations
2019-09-13 00:19:10
  • First insertion