Red Hat Enterprise Linux 7 update for libvncserver
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2017-18922 |
| CWE-ID | CWE-787 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
libvncserver (Red Hat package) Operating systems & Components / Operating system package or component |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Out-of-bounds write
EUVDB-ID: #VU30157
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-18922
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.
MitigationInstall updates from vendor's website.
libvncserver (Red Hat package): 0.9.9-12.el7_5 - 0.9.9-13.el7_6
External linkshttp://access.redhat.com/errata/RHSA-2020:3281
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.
