PT-2019-1355 · Libvnc+3 · Libvncserver+3

Pavel Cheremushkin · Published 2019-01-06 · Updated 2022-03-10 · CVE-2018-20749

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions LibVNC versions prior to 0.9.12

Description The issue is related to a heap out-of-bounds write vulnerability in the rfbserver.c component of the LibVNCServer library. This vulnerability can be exploited by a remote attacker to cause a denial of service and gain unauthorized access to sensitive data.

Recommendations For versions prior to 0.9.12, update to version 0.9.12 or later to resolve the issue. As a temporary workaround, consider restricting access to the vulnerable component until a patch is applied.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2019-2585

ALT-PU-2019-2662

ALT-PU-2021-1040

BDU:2019-00703

CVE-2018-20749

DLA-1652-1

DLA-1979-1

MGASA-2020-0435

OPENSUSE-SU-2019:0196-1

OPENSUSE-SU-2019_0196-1

OPENSUSE-SU-2019_0200-1

OPENSUSE-SU-2024:10598-1

SUSE-SU-2019:0283-1

SUSE-SU-2019:0313-1

SUSE-SU-2019:0313-2

SUSE-SU-2019:13952-1

USN-3877-1

USN-4547-1

USN-4587-1

Affected Products

Alt Linux

Libvncserver

Suse

Ubuntu

References · 68

• 🔥 https://openwall.com/lists/oss-security/2018/12/10/8 · Exploit
• https://github.com/LibVNC/libvncserver/commit/15bb719c03cc70f14c36a843dcb16ed69b405707 · Patch
• https://usn.ubuntu.com/3877-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-20749 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2019:0283-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-20021 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-6307 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-20749 · Security Note
• https://ubuntu.com/security/CVE-2018-20023 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-20749 · Vendor Advisory
• https://ubuntu.com/security/CVE-2014-6053 · Vendor Advisory
• https://ubuntu.com/security/CVE-2014-6055 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2020-0435.html · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-20749 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-1652-1 · Vendor Advisory