UBUNTU-CVE-2020-26117

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Source
https://ubuntu.com/security/CVE-2020-26117
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-26117.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-26117
Upstream
Downstream
Related
Published
2020-09-27T04:15:00Z
Modified
2025-10-24T04:48:45Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:18.04:LTS / tigervnc

Package

Name
tigervnc
Purl
pkg:deb/ubuntu/tigervnc@1.7.0+dfsg-8ubuntu2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.7.0+dfsg-7ubuntu1
1.7.0+dfsg-8ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.7.0+dfsg-8ubuntu2",
            "binary_name": "tigervnc-common"
        },
        {
            "binary_version": "1.7.0+dfsg-8ubuntu2",
            "binary_name": "tigervnc-scraping-server"
        },
        {
            "binary_version": "1.7.0+dfsg-8ubuntu2",
            "binary_name": "tigervnc-standalone-server"
        },
        {
            "binary_version": "1.7.0+dfsg-8ubuntu2",
            "binary_name": "tigervnc-viewer"
        },
        {
            "binary_version": "1.7.0+dfsg-8ubuntu2",
            "binary_name": "tigervnc-xorg-extension"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / tigervnc

Package

Name
tigervnc
Purl
pkg:deb/ubuntu/tigervnc@1.10.1+dfsg-3ubuntu0.1+esm2?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.10.1+dfsg-3ubuntu0.1+esm2

Affected versions

1.*

1.9.0+dfsg-3
1.9.0+dfsg-4
1.10.1+dfsg-1
1.10.1+dfsg-2
1.10.1+dfsg-3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "1.10.1+dfsg-3ubuntu0.1+esm2",
            "binary_name": "tigervnc-common"
        },
        {
            "binary_version": "1.10.1+dfsg-3ubuntu0.1+esm2",
            "binary_name": "tigervnc-scraping-server"
        },
        {
            "binary_version": "1.10.1+dfsg-3ubuntu0.1+esm2",
            "binary_name": "tigervnc-standalone-server"
        },
        {
            "binary_version": "1.10.1+dfsg-3ubuntu0.1+esm2",
            "binary_name": "tigervnc-viewer"
        },
        {
            "binary_version": "1.10.1+dfsg-3ubuntu0.1+esm2",
            "binary_name": "tigervnc-xorg-extension"
        }
    ]
}