CVE-2018-20749

Public Exploit

Description

LibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 10.90% Top 10%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://lists.debian.org/debian-lts-announce/2019/01/msg00029.html third party advisory mailing list
http://www.securityfocus.com/bid/106825 vdb entry broken link
https://github.com/LibVNC/libvncserver/commit/15bb719c03cc70f14c36a843dcb16ed69b405707 third party advisory patch
https://github.com/LibVNC/libvncserver/issues/273 issue tracking third party advisory
https://usn.ubuntu.com/3877-1/ third party advisory vendor advisory
https://www.openwall.com/lists/oss-security/2018/12/10/8 mailing list exploit third party advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html third party advisory mailing list
https://usn.ubuntu.com/4547-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4587-1/ third party advisory vendor advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2018-20749?
CVE-2018-20749 has been scored as a critical severity vulnerability.
How to fix CVE-2018-20749?
To fix CVE-2018-20749, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-20749 being actively exploited in the wild?
It is possible that CVE-2018-20749 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~11% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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