CVE-2017-18922
CRITICAL severity · CVSS 9.8 · Out-of-bounds write
9.8CVSS CRITICAL
Summary
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 & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)2%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf ↗
Additional information
- NVD record
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatch
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00020.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00028.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.htmlAdvisory
- http://www.openwall.com/lists/oss-security/2020/06/30/3Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1852356Advisory