Denial of service in LibVNCServer
| 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 |
LibVNCServer Server applications / Remote management servers, RDP, SSH |
| Vendor | LibVNC |
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
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsLibVNCServer: 0.9.0 - 0.9.13
External linkshttp://github.com/LibVNC/libvncserver/commit/bef41f6ec4097a8ee094f90a1b34a708fbd757ec
http://lists.debian.org/debian-lts-announce/2022/09/msg00035.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
