CVE-2018-14404

Publication date 19 July 2018

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

A NULL pointer dereference vulnerability exists in the xpath.c:xmlXPathCompOpEval() function of libxml2 through 2.9.8 when parsing an invalid XPath expression in the XPATH_OP_AND or XPATH_OP_OR case. Applications processing untrusted XSL format inputs with the use of the libxml2 library may be vulnerable to a denial of service attack due to a crash of the application.

Status

Package Ubuntu Release Status
libxml2 18.04 LTS bionic
Fixed 2.9.4+dfsg1-6.1ubuntu1.2
17.10 artful Ignored end of life
16.04 LTS xenial
Fixed 2.9.3+dfsg1-1ubuntu0.6
14.04 LTS trusty
Fixed 2.9.1+dfsg1-3ubuntu4.13

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libxml2

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-3739-2
    • libxml2 vulnerabilities
    • 14 August 2018
    • USN-3739-1
    • libxml2 vulnerabilities
    • 14 August 2018

Other references