openEuler 22.03 LTS update for libvncserver



Published: 2022-11-11
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-29260
CWE-ID CWE-401
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		openEuler
Operating systems & Components / Operating system

libvncserver-debugsource
Operating systems & Components / Operating system package or component

libvncserver-devel
Operating systems & Components / Operating system package or component

libvncserver-debuginfo
Operating systems & Components / Operating system package or component

libvncserver
Operating systems & Components / Operating system package or component

Vendor openEuler

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Memory leak

EUVDB-ID: #VU67972

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 22.03 LTS

libvncserver-debugsource: before 0.9.13-3

libvncserver-devel: before 0.9.13-3

libvncserver-debuginfo: before 0.9.13-3

libvncserver: before 0.9.13-3

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-2090


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.



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