CVE-2019-15681 Information disclosure in LibVNC

High 7.5 Published 29 Oct 2019 Updated 5 Aug 2024

An attacker can read stack memory via a memory leak in LibVNC, potentially bypassing ASLR when combined with other vulnerabilities.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2019-15681?

CVE-2019-15681 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 29 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-665

Which versions are affected by CVE-2019-15681?

It affects 9 products.

Linux distribution packages (7)

`vino` SUSE:Linux Enterprise Module for Desktop Applications 15 SP1	All versions	`3.22.0-3.6.76`
`vino` SUSE:Linux Enterprise Server 12 SP4	All versions	`3.20.2-7.3.21`
`vino` SUSE:Linux Enterprise Server 12 SP5	All versions	`3.20.2-7.3.21`
`vino` SUSE:Linux Enterprise Server for SAP Applications 12 SP4	All versions	`3.20.2-7.3.21`
`vino` SUSE:Linux Enterprise Server for SAP Applications 12 SP5	All versions	`3.20.2-7.3.21`
`vino` openSUSE:Leap 15.1	All versions	`3.22.0-lp151.4.3.1`
`vino` openSUSE:Tumbleweed	All versions	`3.22.0-7.9`

Products include Canonical Ubuntu Linux, Debian Debian Linux, Libvnc Project Libvncserver, Siemens Simatic Itc1500 Firmware, Siemens Simatic Itc1500 Pro Firmware, Siemens Simatic Itc1900 Firmware and 3 more.

How do I fix CVE-2019-15681?

Apply the vendor's patch.

Is CVE-2019-15681 being exploited?

There is no known exploitation of CVE-2019-15681 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as ALPINE-CVE-2019-15681, DEBIAN-CVE-2019-15681, DLA-1977-1, GHSA-gg2p-m82f-fgjg, MGASA-2019-0368, SUSE-SU-2020:0955-1 and 4 more.