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Status published
Critical
CVE-2017-18922
It was discovered that websockets.c in LibVNCServer prior to 0.9.12...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/LibVNC/libvncserver/commit/aac95a9dcf4bbba87b76c72706c3221a842ca433
- https://www.openwall.com/lists/oss-security/2020/06/30/2
- https://bugzilla.redhat.com/show_bug.cgi?id=1852356
- http://www.openwall.com/lists/oss-security/2020/06/30/3
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00020.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NVP7TJVYJDXDFRHVQ3ENEN3H354QPXEZ/
- https://usn.ubuntu.com/4407-1/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4F6FUH4EFK4NAP6GT4TQRTBKWIRCZLIY/
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00028.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
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Affected Vendor
libvncserver project
View all reports →Affected Software
libvncserver, ubuntu linux, leap, fedora, simatic itc1500 firmware, simatic itc1500 pro firmware, simatic itc1900 firmware, simatic itc1900 pro firmware, simatic itc2200 firmware, simatic itc2200 pro firmware
Vulnerable Versions:
0, 16.04, 18.04, 19.10, 20.04, 15.1, 15.2, 31, 32, 3.0.0.0
Timeline
Official Publish:
June 30th, 2020
Last Modified:
August 5th, 2024
Added to House:
July 20th, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.