USN-6198-1

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Source
https://ubuntu.com/security/notices/USN-6198-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6198-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-6198-1
Upstream
Related
Published
2023-07-03T12:53:20.387535Z
Modified
2025-09-08T16:37:49Z
Summary
screen vulnerability
Details

It was discovered that GNU Screen was not properly checking user identifiers before sending certain signals to target processes. If GNU Screen was installed as setuid or setgid, a local attacker could possibly use this issue to cause a denial of service on a target application.

References

Affected packages

Ubuntu:Pro:14.04:LTS / screen

Package

Name
screen
Purl
pkg:deb/ubuntu/screen@4.1.0~20120320gitdb59704-9ubuntu0.1~esm3?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.1.0~20120320gitdb59704-9ubuntu0.1~esm3

Affected versions

4.*

4.0.3-14ubuntu10
4.1.0~20120320gitdb59704-9
4.1.0~20120320gitdb59704-9ubuntu0.1~esm1
4.1.0~20120320gitdb59704-9ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "screen",
            "binary_version": "4.1.0~20120320gitdb59704-9ubuntu0.1~esm3"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Ubuntu:Pro:16.04:LTS / screen

Package

Name
screen
Purl
pkg:deb/ubuntu/screen@4.3.1-2ubuntu0.1+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.3.1-2ubuntu0.1+esm1

Affected versions

4.*

4.3.1-2
4.3.1-2build1
4.3.1-2ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "screen",
            "binary_version": "4.3.1-2ubuntu0.1+esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Ubuntu:Pro:18.04:LTS / screen

Package

Name
screen
Purl
pkg:deb/ubuntu/screen@4.6.2-1ubuntu1.1+esm1?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.6.2-1ubuntu1.1+esm1

Affected versions

4.*

4.6.1-1
4.6.2-1
4.6.2-1ubuntu1
4.6.2-1ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "screen",
            "binary_version": "4.6.2-1ubuntu1.1+esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}