SUSE update for LibVNCServer

1) Memory leak

EUVDB-ID: #VU67972

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-29260

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak within the rfbClientCleanup() function. A remote attacker can force the server to leak memory and perform denial of service attack.

Mitigation

Update the affected package LibVNCServer to the latest version.

Vulnerable software versions

SUSE Manager Retail Branch Server: 4.3

SUSE Linux Enterprise Workstation Extension: 15-SP4

SUSE Linux Enterprise Module for Packagehub Subpackages: 15-SP4

SUSE Manager Server: 4.3

SUSE Manager Proxy: 4.3

SUSE Linux Enterprise Desktop: 15-SP4

SUSE Linux Enterprise Server: 15-SP4

openSUSE Leap: 15.4

SUSE Linux Enterprise Server for SAP Applications: 15-SP4

SUSE Linux Enterprise High Performance Computing: 15-SP4

libvncserver1-debuginfo: before 0.9.13-150400.3.3.1

libvncserver1: before 0.9.13-150400.3.3.1

libvncclient1-debuginfo: before 0.9.13-150400.3.3.1

libvncclient1: before 0.9.13-150400.3.3.1

LibVNCServer-devel: before 0.9.13-150400.3.3.1

LibVNCServer-debugsource: before 0.9.13-150400.3.3.1

CPE2.3

• cpe:2.3:o:suse:suse_manager_retail_branch_server:4.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_workstation_extension:15-SP4:*:*:*:*:*:*:*
• cpe:2.3:a:suse:suse_linux_enterprise_module_for_packagehub_subpackages:15-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_server:4.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_proxy:4.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_desktop:15-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:15-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:opensuse_leap:15.4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications:15-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing:15-SP4:*:*:*:*:*:*:*
• cpe:2.3:a:suse:libvncserver1-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libvncserver1:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libvncclient1-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libvncclient1:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libvncserver-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libvncserver-debugsource:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20223540-1/

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.