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CVE-2018-14598

Public on 2018-08-24
Modified on 2020-06-03
Description

It was discovered that libX11 does not properly validate input coming from the server, causing XListExtensions() and XGetFontPath() functions to produce an invalid list of elements that in turn make XFreeExtensionsList() and XFreeFontPath() access invalid memory. An attacker who can either configure a malicious X server or modify the data coming from one, could use this flaw to crash the application using libX11, resulting in a denial of service.

Severity
Medium
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CVSS v3 Base Score
5.9
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core libX11 2019-06-11 23:17 ALAS2-2019-1226
Amazon Linux 2 - Core xorg-x11-server 2020-06-03 18:21 ALAS2-2020-1433

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD CVSSv2 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
NVD CVSSv3 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Red Hat: CVE-2018-14598 Mitre: CVE-2018-14598 FAQs regarding Amazon Linux ALAS/CVE Severity