Alpine: multiple libx11 packages: security update to 1.6.6-r0

critical Tenable Cloud Security Plugin ID 424089

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

- An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can
send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed
later on, leading to DoS (segmentation fault). (CVE-2018-14598)

- An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable
to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other
impact. (CVE-2018-14599)

- An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a
variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading
to DoS or remote code execution. (CVE-2018-14600)

Plugin Details

Severity: Critical

ID: 424089

Version: Revision 1.8

Type: Local

Family: Alpine Linux Local Security Checks

Published: 4/4/2025

Updated: 7/2/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.12

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2018-14600

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 8/21/2018

Reference Information

CVE: CVE-2018-14598, CVE-2018-14599, CVE-2018-14600

BID: 105177

Detections

Analytics