Improper Input Validation

Affecting libx11 package, versions <2:1.6.3-1ubuntu2.1

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Overview

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).

References

CVSS Score

7.5
medium severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    None
  • Availability
    High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE
CVE-2018-14598
CWE
CWE-20
Snyk ID
SNYK-UBUNTU1604-LIBX11-339125
Disclosed
24 Aug, 2018
Published
25 Sep, 2018