CVE-2018-20022
Published: 19 December 2018
LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC 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
Priority
Medium
CVSS 3 base score: 7.5
Status
| Package | Release | Status |
|---|---|---|
|
italc Launchpad, Ubuntu, Debian |
Upstream |
Released
(1:3.0.3+dfsg1-1+deb9u1, 1:2.0.2+dfsg1-2+deb8u1)
|
| Ubuntu 21.10 (Impish Indri) |
Does not exist
|
|
| Ubuntu 21.04 (Hirsute Hippo) |
Does not exist
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(1:3.0.3+dfsg1-3ubuntu0.1)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(1:2.0.2+dfsg1-4ubuntu0.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was needed)
|
|
|
libvncserver Launchpad, Ubuntu, Debian |
Upstream |
Released
(0.9.11+dfsg-1.2)
|
| Ubuntu 21.10 (Impish Indri) |
Not vulnerable
(0.9.11+dfsg-1.2)
|
|
| Ubuntu 21.04 (Hirsute Hippo) |
Not vulnerable
(0.9.11+dfsg-1.2)
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Not vulnerable
(0.9.11+dfsg-1.2)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(0.9.11+dfsg-1ubuntu1.1)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(0.9.10+dfsg-3ubuntu0.16.04.3)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was released [0.9.9+dfsg-1ubuntu1.4])
|
|
|
Patches: Upstream: https://github.com/LibVNC/libvncserver/commit/2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 |
||
|
ssvnc Launchpad, Ubuntu, Debian |
Upstream |
Released
(1.0.29-2+deb8u1, 1.0.29-3+deb9u1, 1.0.29-4+deb10u1, 1.0.29-5)
|
| Ubuntu 21.10 (Impish Indri) |
Not vulnerable
(1.0.29-5)
|
|
| Ubuntu 21.04 (Hirsute Hippo) |
Not vulnerable
(1.0.29-5)
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Not vulnerable
(1.0.29-5)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Needed
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(1.9.29-2+deb8u1build0.16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was needed)
|
|
|
tightvnc Launchpad, Ubuntu, Debian |
Upstream |
Released
(1:1.3.9-6.5+deb8u1)
|
| Ubuntu 21.10 (Impish Indri) |
Needs triage
|
|
| Ubuntu 21.04 (Hirsute Hippo) |
Needs triage
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Needs triage
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Needs triage
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Ignored
(end of standard support, was needs-triage)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was needed)
|
|
|
x11vnc Launchpad, Ubuntu, Debian |
Upstream |
Needs triage
|
| Ubuntu 21.10 (Impish Indri) |
Not vulnerable
(uses shared libvnc)
|
|
| Ubuntu 21.04 (Hirsute Hippo) |
Not vulnerable
(uses shared libvnc)
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Not vulnerable
(uses shared libvnc)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(uses shared libvnc)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Not vulnerable
(uses shared libvnc)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Not vulnerable
(uses shared libvnc)
|
|
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20022
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-032-libvnc-multiple-memory-leaks/
- https://ubuntu.com/security/notices/USN-3877-1
- https://ubuntu.com/security/notices/USN-4547-1
- https://ubuntu.com/security/notices/USN-4547-2
- https://ubuntu.com/security/notices/USN-4587-1
- NVD
- Launchpad
- Debian