PT-2019-1356 · Libvnc+3 · Libvnc+4

Pavel Cheremushkin · Published 2019-01-07 · Updated 2022-03-10 · CVE-2018-20750

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 through 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 LibVNC through 0.9.12, consider applying the necessary patches or fixes to address the incomplete fix for the issue. As a temporary workaround, restrict access to the vulnerable rfbserver.c component to minimize the risk of exploitation.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2019-2585

ALT-PU-2019-2662

ALT-PU-2021-1040

BDU:2019-00704

CVE-2018-20750

DLA-1652-1

DLA-1979-1

MGASA-2019-0070

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

Libvnc

Libvncserver

Suse

Ubuntu

References · 73

• 🔥 https://openwall.com/lists/oss-security/2018/12/10/8 · Exploit
• https://github.com/LibVNC/libvncserver/commit/09e8fc02f59f16e2583b34fe1a270c238bd9ffec · Patch
• https://usn.ubuntu.com/3877-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2019:0283-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-20021 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-20750 · Security Note
• https://ubuntu.com/security/CVE-2018-6307 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-20023 · 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/CVE-2018-20750 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-1652-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-00704 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-20750 · Vendor Advisory