Executive Summary

Summary
Title Expat vulnerability
Informations
Name USN-4132-1 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
 
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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

Detail

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

- Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS

Summary:

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

Software Description: - expat: XML parsing C library

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 19.04:
libexpat1 2.2.6-1ubuntu0.19.5

Ubuntu 18.04 LTS:
libexpat1 2.2.5-3ubuntu0.2

Ubuntu 16.04 LTS:
lib64expat1 2.1.0-7ubuntu0.16.04.5
libexpat1 2.1.0-7ubuntu0.16.04.5

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

References:
https://usn.ubuntu.com/4132-1
CVE-2019-15903

Package Information:
https://launchpad.net/ubuntu/+source/expat/2.2.6-1ubuntu0.19.5
https://launchpad.net/ubuntu/+source/expat/2.2.5-3ubuntu0.2
https://launchpad.net/ubuntu/+source/expat/2.1.0-7ubuntu0.16.04.5

Original Source

Url : http://www.ubuntu.com/usn/USN-4132-1

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

TypeDescriptionCount
Application 12
Application 290

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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0
1
Date Informations
2019-09-13 00:22:26
  • Multiple Updates
2019-09-13 00:19:10
  • First insertion