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OpenAdvisories
Unscored USN-4772-1 2 CVEs

vnc4 vulnerabilities

Published Mar 15, 2021 · Updated Jun 29, 2026

Summary

USN-2500-1 addressed CVE-2015-0255 for xorg-server. This update provides
the corresponding fix for VNC4 on Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
(CVE-2015-0255)

USN-2726-1 addressed CVE-2015-1283 for Expat. This update provides the
corresponding fix for VNC4 on Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
(CVE-2015-1283)

Original advisory details:

Olivier Fourdan discovered that the X.Org X server incorrectly handled
XkbSetGeometry requests resulting in an information leak. An attacker able
to connect to an X server, either locally or remotely, could use this issue
to possibly obtain sensitive information. (CVE-2015-0255)

It was discovered that Expat incorrectly handled malformed XML data. If a
user or application linked against Expat were tricked into opening a
crafted XML file, an attacker could cause a denial of service, or possibly
execute arbitrary code. (CVE-2015-1283)

Fixed packages 2

ReleasePackageFixed in
Ubuntu · Pro 14.04 LTS Pro:14.04:LTS vnc4 4.1.1+xorg4.3.0-37ubuntu5.0.2+esm1
Ubuntu · Pro 16.04 LTS Pro:16.04:LTS vnc4 4.1.1+xorg4.3.0-37.3ubuntu2.1+esm1

Vulnerabilities 2

References

  • report
    https://ubuntu.com/security/CVE-2015-0255
  • report
    https://ubuntu.com/security/CVE-2015-1283