Red Hat Enterprise Linux 7 update for libvncserver

1) Heap-based buffer overflow

EUVDB-ID: #VU26343

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-15690

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A remote attacker can trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

libvncserver (Red Hat package): 0.9.9-12.el7_5 - 0.9.9-13.el7_6

Red Hat Enterprise Linux Workstation: 7

CPE2.3

• cpe:2.3:o:red_hat:libvncserver_redhat_package:0.9.9-12.el7_5:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:libvncserver_redhat_package:0.9.9-13.el7_6:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:o:red_hat:red_hat_enterprise_linux_workstation:7:*:*:*:*:red_hat_enterprise_linux:*:*

External links

https://access.redhat.com/errata/RHSA-2020:0913

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.