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CVE-2020-26117

Status Candidate

Overview

In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception.

Related Files

Gentoo Linux Security Advisory 202407-14
Posted Jul 5, 2024
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202407-14 - Multiple vulnerabilities have been discovered in TigerVNC, the worst of which could lead to remote code execution. Versions greater than or equal to 1.12.0-r2 are affected.

tags | advisory, remote, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2019-15691, CVE-2019-15692, CVE-2019-15694, CVE-2019-15695, CVE-2020-26117
SHA-256 | a06f93c1554c67258a4a817a80cdadbad517413f45d1a0899224d847bcf13a11
Ubuntu Security Notice USN-5965-1
Posted Mar 21, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5965-1 - It was discovered that TigerVNC mishandled TLS certificate exceptions. An attacker could use this vulnerability to impersonate any server after a client had added an exception and obtain sensitive information.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2020-26117
SHA-256 | e166ae752951bf18e75b2cf377be8ae567407cff980379c3476eb2f4f4c8d8c9
Red Hat Security Advisory 2021-1783-01
Posted May 19, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1783-01 - Virtual Network Computing is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients.

tags | advisory, remote
systems | linux, redhat
advisories | CVE-2020-26117
SHA-256 | 2976cd13b135853831ffbc8a3cab885923c1027271cc7b8c75252935808455ad
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