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CVE-2018-20023

N/A
Published: December 19, 2018 at 04:00 PM UTC
Updated: June 17, 2026 at 01:52 AM UTC
3 products affected across 3 vendorsDebian LinuxUbuntu LinuxLibVNCServer

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Severity
N/A
Exploit prediction
EPSS 2%

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
14.0416.0418.0418.10
Debian Linux· Debiandrupal
95%
8.09.0
LibVNCServer· Libvnc Project
95%
v < 0.9.12commit 8b06f835e259652b0ff026898014fc7297ade858
Affected range stops below 0.9.12, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (8)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-033-libvnc-memory-leak/
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
Vendor Advisoryx_refsource_GENTOO
Source: [email protected]
https://security.gentoo.org/glsa/201908-05
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/3877-1/
Vendor Advisoryx_refsource_UBUNTU
Source: [email protected]
https://usn.ubuntu.com/4547-1/
Vendor Advisoryx_refsource_UBUNTU
Source: [email protected]
https://usn.ubuntu.com/4587-1/
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2019/dsa-4383

CVSS

5MEDIUM[email protected]
Confidentiality
PARTIAL
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-665

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