CVE-2018-20023
LibVNC Improper Initialization Memory Information Disclosure
Description
LibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665: Improper Initialization vulnerability in VNC Repeater client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memory layout and in bypassing ASLR
INFO
Published Date :
Dec. 19, 2018, 4:29 p.m.
Last Modified :
Oct. 23, 2020, 1:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2018-20023
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-20023.
| URL | Resource |
|---|---|
| https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-033-libvnc-memory-leak/ | Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html | |
| https://security.gentoo.org/glsa/201908-05 | |
| https://usn.ubuntu.com/3877-1/ | Third Party Advisory |
| https://usn.ubuntu.com/4547-1/ | |
| https://usn.ubuntu.com/4587-1/ | |
| https://www.debian.org/security/2019/dsa-4383 | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-20023 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-20023 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Oct. 23, 2020
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4587-1/ [No Types Assigned] -
CVE Modified by [email protected]
Sep. 30, 2020
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4547-1/ [No Types Assigned] -
CWE Remap by [email protected]
Aug. 24, 2020
Action Type Old Value New Value Changed CWE CWE-200 CWE-665 -
CVE Modified by [email protected]
Oct. 31, 2019
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html [No Types Assigned] -
CVE Modified by [email protected]
Aug. 09, 2019
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/201908-05 [No Types Assigned] -
Modified Analysis by [email protected]
Feb. 06, 2019
Action Type Old Value New Value Changed CVSS V3 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://usn.ubuntu.com/3877-1/ No Types Assigned https://usn.ubuntu.com/3877-1/ Third Party Advisory Changed Reference Type https://www.debian.org/security/2019/dsa-4383 No Types Assigned https://www.debian.org/security/2019/dsa-4383 Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 04, 2019
Action Type Old Value New Value Added Reference https://www.debian.org/security/2019/dsa-4383 [No Types Assigned] -
CVE Modified by [email protected]
Feb. 01, 2019
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/3877-1/ [No Types Assigned] -
Initial Analysis by [email protected]
Jan. 09, 2019
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Changed Reference Type https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html No Types Assigned https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html Mailing List, Third Party Advisory Changed Reference Type https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-033-libvnc-memory-leak/ No Types Assigned https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-033-libvnc-memory-leak/ Third Party Advisory Added CWE CWE-200 Added CPE Configuration OR *cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:* versions up to (excluding) 0.9.12 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 27, 2018
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-20023 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-20023
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.51 }} -0.05%
score
0.76800
percentile