Public Date:
1661136: CVE-2018-6307 libvncserver: Use-after-free in file transfer extension server code allows for potential code execution

The MITRE CVE dictionary describes this issue as:

LibVNC before commit ca2a5ac02fbbadd0a21fabba779c1ea69173d10b contains heap use-after-free vulnerability in server code of file transfer extension that can result remote code execution.

Find out more about CVE-2018-6307 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the versions of libvncserver as shipped with Red Hat Enterprise Linux 6 and 7, as they did not include support for tightvnc file transfer.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 7.5
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 7 libvncserver Not affected
Red Hat Enterprise Linux 6 libvncserver Not affected

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation