CVE-2018-20023

high
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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

References

https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-033-libvnc-memory-leak/

https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html

https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html

https://security.gentoo.org/glsa/201908-05

https://usn.ubuntu.com/3877-1/

https://usn.ubuntu.com/4547-1/

https://usn.ubuntu.com/4587-1/

https://www.debian.org/security/2019/dsa-4383

Details

Source: MITRE

Published: 2018-12-19

Updated: 2020-10-23

Type: CWE-665

Risk Information

CVSS v2

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH

Tenable Plugins

View all (11 total)

IDNameProductFamilySeverity
141545Ubuntu 16.04 LTS : iTALC vulnerabilities (USN-4587-1)NessusUbuntu Local Security Checks
critical
140920Ubuntu 18.04 LTS : iTALC vulnerabilities (USN-4547-1)NessusUbuntu Local Security Checks
critical
130408Debian DLA-1979-1 : italc security updateNessusDebian Local Security Checks
critical
127563GLSA-201908-05 : LibVNCServer: Multiple vulnerabilitiesNessusGentoo Local Security Checks
critical
121561Debian DSA-4383-1 : libvncserver - security updateNessusDebian Local Security Checks
critical
121541Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : LibVNCServer vulnerabilities (USN-3877-1)NessusUbuntu Local Security Checks
critical
121282openSUSE Security Update : LibVNCServer (openSUSE-2019-53)NessusSuSE Local Security Checks
critical
121158SUSE SLED15 / SLES15 Security Update : LibVNCServer (SUSE-SU-2019:0080-1)NessusSuSE Local Security Checks
critical
121154openSUSE Security Update : LibVNCServer (openSUSE-2019-45)NessusSuSE Local Security Checks
critical
121094SUSE SLES12 Security Update : LibVNCServer (SUSE-SU-2019:0060-1)NessusSuSE Local Security Checks
critical
119877Debian DLA-1617-1 : libvncserver security updateNessusDebian Local Security Checks
critical