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CVE details

CVE-2021-42785

Buffer Overflow vulnerability in tvnviewer.exe of TightVNC Viewer allows a remote attacker to execute arbitrary instructions via a crafted FramebufferUpdate packet from a VNC server.

Score
9.8 critical
Published
2021-11-23
Links
NVD · cve.org

Affected ports (1)

PortPackageVersionStatusMaintainer
net/tightvnctightvnc1.3.10_10unaddresseddinoex@FreeBSD.org

Template for a VuXML entry

Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>FIXME -- FIXME</topic>
    <affects>
      <package>
	<name>tightvnc</name>
	<range><lt>FIXME</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>Buffer Overflow vulnerability in tvnviewer.exe of TightVNC Viewer
	allows a remote attacker to execute arbitrary instructions via a
	crafted FramebufferUpdate packet from a VNC server.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2021-42785</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2021-42785</url>
    </references>
    <dates>
      <discovery>2021-11-23</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>