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CVE-2017-18922

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2020-3588-01
Posted Sep 1, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3588-01 - LibVNCServer is a C library that enables you to implement VNC server functionality into own programs. Issues addressed include a buffer overflow vulnerability.

tags | advisory, overflow
systems | linux, redhat
advisories | CVE-2017-18922
SHA-256 | 8b3ae7933846cb4d69b60bf086fb3a8599cfb74db5273079db91237e8d7d671f
Red Hat Security Advisory 2020-3456-01
Posted Aug 17, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3456-01 - LibVNCServer is a C library that enables you to implement VNC server functionality into own programs. Issues addressed include a buffer overflow vulnerability.

tags | advisory, overflow
systems | linux, redhat
advisories | CVE-2017-18922
SHA-256 | b5cbc7e5a4222c90d190f878e753641a9faa5cad630e772545d2e9622d2b6744
Red Hat Security Advisory 2020-3385-01
Posted Aug 10, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3385-01 - LibVNCServer is a C library that enables you to implement VNC server functionality into own programs. Issues addressed include a buffer overflow vulnerability.

tags | advisory, overflow
systems | linux, redhat
advisories | CVE-2017-18922
SHA-256 | fd4f48df7a85f4ef84e9a1f20f961b4f76aa5b5d13d940a45f63b050a06b3268
Red Hat Security Advisory 2020-3281-01
Posted Aug 3, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3281-01 - LibVNCServer is a C library that enables you to implement VNC server functionality into own programs. Issues addressed include a buffer overflow vulnerability.

tags | advisory, overflow
systems | linux, redhat
advisories | CVE-2017-18922
SHA-256 | 5fcc9c3e269d3b6a2376683fd8345afbc71bb041935c320092eabdb4aac274c1
Ubuntu Security Notice USN-4407-1
Posted Jul 2, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4407-1 - It was discovered that LibVNCServer incorrectly handled decompressing data. An attacker could possibly use this issue to cause LibVNCServer to crash, resulting in a denial of service. It was discovered that an information disclosure vulnerability existed in LibVNCServer when sending a ServerCutText message. An attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 19.10, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS. Various other issues were also addressed.

tags | advisory, denial of service, info disclosure
systems | linux, ubuntu
advisories | CVE-2017-18922, CVE-2019-15680, CVE-2019-15681, CVE-2019-20788
SHA-256 | 381823d3f578d2ce7c04ed4ac635ad995451cdf2fecebc4a75523f9889132a63
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