Vulnerability CVE-2017-18922
Published: 2020-06-30

Description:
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.

Type:

CWE-787

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Libvncserver project -> Libvncserver 

 References:
http://www.openwall.com/lists/oss-security/2020/06/30/3
https://bugzilla.redhat.com/show_bug.cgi?id=1852356
https://github.com/LibVNC/libvncserver/commit/aac95a9dcf4bbba87b76c72706c3221a842ca433
https://www.openwall.com/lists/oss-security/2020/06/30/2
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