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CVE-2019-15681

Published: 29 October 2019

LibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a memory leak (CWE-655) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appear to be exploitable via network connectivity. These vulnerabilities have been fixed in commit d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a.

From the Ubuntu Security Team

Pavel Cheremushkin discovered that TightVNC has a memory leak vulnerability. An attacker could use it to disclosure sensitive information.

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
italc
Launchpad, Ubuntu, Debian
bionic
Released (1:3.0.3+dfsg1-3ubuntu0.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

precise Does not exist

trusty Does not exist
(trusty was needed)
upstream
Released (1:3.0.3+dfsg1-1+deb9u1, 1:2.0.2+dfsg1-2+deb8u1)
xenial
Released (1:2.0.2+dfsg1-4ubuntu0.1)
krfb
Launchpad, Ubuntu, Debian
bionic Needs triage

disco Ignored
(reached end-of-life)
eoan Ignored
(reached end-of-life)
focal Needs triage

groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Ignored
(reached end-of-life)
jammy Needs triage

kinetic Needs triage

precise Does not exist

trusty Does not exist

upstream Needs triage

xenial Needs triage

libvncserver
Launchpad, Ubuntu, Debian
bionic
Released (0.9.11+dfsg-1ubuntu1.2)
disco Ignored
(reached end-of-life)
eoan
Released (0.9.11+dfsg-1.3ubuntu0.1)
focal Not vulnerable
(0.9.12+dfsg-8)
groovy Not vulnerable
(0.9.12+dfsg-8)
hirsute Not vulnerable
(0.9.12+dfsg-8)
impish Not vulnerable
(0.9.12+dfsg-8)
jammy Not vulnerable
(0.9.12+dfsg-8)
kinetic Not vulnerable
(0.9.12+dfsg-8)
precise Does not exist

trusty Does not exist

upstream Needs triage

xenial
Released (0.9.10+dfsg-3ubuntu0.16.04.4)
Patches:
upstream: https://github.com/LibVNC/libvncserver/commit/d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a
tightvnc
Launchpad, Ubuntu, Debian
bionic Needs triage

disco Ignored
(reached end-of-life)
eoan Ignored
(reached end-of-life)
focal Needs triage

groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Ignored
(reached end-of-life)
jammy Needs triage

kinetic Needs triage

precise Does not exist

trusty
Released (1.3.9-6.5+deb8u1build0.14.04.1~esm1)
upstream Needs triage

xenial Needs triage

veyon
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Ignored
(reached end-of-life)
eoan Ignored
(reached end-of-life)
focal Needs triage

groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Ignored
(reached end-of-life)
jammy Needs triage

kinetic Needs triage

precise Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

vino
Launchpad, Ubuntu, Debian
bionic
Released (3.22.0-3ubuntu1.1)
disco Ignored
(reached end-of-life)
eoan Ignored
(reached end-of-life)
focal
Released (3.22.0-5ubuntu2.1)
groovy
Released (3.22.0-6ubuntu1)
hirsute
Released (3.22.0-6ubuntu1)
impish
Released (3.22.0-6ubuntu1)
jammy
Released (3.22.0-6ubuntu1)
kinetic
Released (3.22.0-6ubuntu1)
precise Does not exist

trusty Does not exist

upstream Needs triage

xenial
Released (3.8.1-0ubuntu9.3)
x11vnc
Launchpad, Ubuntu, Debian
bionic Needs triage

disco Ignored
(reached end-of-life)
eoan Ignored
(reached end-of-life)
focal Needs triage

groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Ignored
(reached end-of-life)
jammy Needs triage

kinetic Needs triage

precise Does not exist

trusty Needs triage

upstream Needs triage

xenial Needs triage

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N