PT-2019-5755 · Tigervnc+4 · Tigervnc+4

Pavel Cheremushkin · Published 2019-12-20 · Updated 2024-06-15 · CVE-2019-15694

Positive Technologies (AI Summary)

CVSS v3.1

7.2

High

Base vector

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

Name of the Vulnerable Software and Affected Versions TigerVNC versions prior to 1.10.1

Description The issue is related to a buffer data boundary overflow in the DecodeManager::decodeRect function of the VNC TigerVNC software. This could allow a remote attacker to access confidential data, compromise its integrity, and cause a denial of service. The vulnerability occurs due to a sign error in processing MemOutStream and could potentially result in remote code execution via network connectivity.

Recommendations For TigerVNC versions prior to 1.10.1, update to version 1.10.1 or later to resolve the issue. As a temporary workaround, consider restricting network connectivity to minimize the risk of exploitation.

Exploit

Fix

RCE

Memory Corruption

Heap Based Buffer Overflow

Weakness Enumeration

CWE-787

CWE-122

Related Identifiers

ALT-PU-2020-2103

ALT-PU-2020-3345

ALT-PU-2021-1185

BDU:2021-01412

CESA-2020_1497

CESA-2020_3875

CVE-2019-15694

MGASA-2020-0042

OPENSUSE-SU-2020:0087-1

OPENSUSE-SU-2020_0087-1

OPENSUSE-SU-2024:10591-1

RHSA-2020:1497

RHSA-2020:3875

RHSA-2020_1497

RHSA-2020_3875

SUSE-SU-2020:0112-1

SUSE-SU-2020:0113-1

SUSE-SU-2020:0159-1

SUSE-SU-2020:0266-1

SUSE-SU-2020:1749-1

Affected Products

Alt Linux

Centos

Red Hat

Suse

Tigervnc

References · 52

• 🔥 https://github.com/CendioOssman/tigervnc/commit/0943c006c7d900dfc0281639e992791d6c567438 · Exploit
• 🔥 https://openwall.com/lists/oss-security/2019/12/20/2 · Exploit
• https://bdu.fstec.ru/vul/2021-01412 · Security Note
• https://wiki.astralinux.ru/astra-linux-se16-bulletin-20211008SE16 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-15694 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2020:0266-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:1749-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:10591-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15694 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-15694 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2020-1497.html · Vendor Advisory
• https://advisories.mageia.org/MGASA-2020-0042.html · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2020:0159-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-15694 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:0112-1 · Vendor Advisory