UBUNTU-CVE-2025-61672

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Source
https://ubuntu.com/security/CVE-2025-61672
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61672.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-61672
Upstream
Published
2025-10-08T15:16:00Z
Modified
2025-10-24T05:23:37Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Synapse is an open source Matrix homeserver implementation. Lack of validation for device keys in Synapse before 1.138.3 and in Synapse 1.139.0 allow an attacker registered on the victim homeserver to degrade federation functionality, unpredictably breaking outbound federation to other homeservers. The issue is patched in Synapse 1.138.3, 1.138.4, 1.139.1, and 1.139.2. Note that even though 1.138.3 and 1.139.1 fix the vulnerability, they inadvertently introduced an unrelated regression. For this reason, the maintainers of Synapse recommend skipping these releases and upgrading straight to 1.138.4 and 1.139.2.

References

Affected packages

Ubuntu:Pro:18.04:LTS / matrix-synapse

Package

Name
matrix-synapse
Purl
pkg:deb/ubuntu/matrix-synapse@0.24.0+dfsg-1ubuntu0.1~esm4?arch=source&distro=esm-apps/bionic

Affected ranges

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

Affected versions

0.*
0.19.2+dfsg-6
0.24.0+dfsg-1
0.24.0+dfsg-1ubuntu0.1~esm1
0.24.0+dfsg-1ubuntu0.1~esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.24.0+dfsg-1ubuntu0.1~esm4",
            "binary_name": "matrix-synapse"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61672.json"

Ubuntu:Pro:20.04:LTS / matrix-synapse

Package

Name
matrix-synapse
Purl
pkg:deb/ubuntu/matrix-synapse@1.11.0-1ubuntu0.1~esm2?arch=source&distro=esm-apps/focal

Affected ranges

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

Affected versions

1.*
1.3.0-1
1.4.0-1
1.5.0-1
1.5.1-1
1.6.0-1
1.6.1-1
1.7.0-2
1.7.1-1
1.7.2-1
1.7.3-1
1.8.0-1
1.9.0-1
1.9.1-1
1.10.0-1
1.10.0-2
1.11.0-1
1.11.0-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.11.0-1ubuntu0.1~esm2",
            "binary_name": "matrix-synapse"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61672.json"

Ubuntu:Pro:22.04:LTS / matrix-synapse

Package

Name
matrix-synapse
Purl
pkg:deb/ubuntu/matrix-synapse@1.53.0-1ubuntu0.1~esm2?arch=source&distro=esm-apps/jammy

Affected ranges

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

Affected versions

1.*
1.39.0-1
1.47.0-2
1.47.1-1
1.48.0-1
1.49.0-1
1.49.2-1
1.50.1-1
1.50.2-1
1.51.0-1
1.52.0-1
1.53.0-1
1.53.0-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.53.0-1ubuntu0.1~esm2",
            "binary_name": "matrix-synapse"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61672.json"

Ubuntu:24.04:LTS / matrix-synapse

Package

Name
matrix-synapse
Purl
pkg:deb/ubuntu/matrix-synapse@1.100.0-1ubuntu1?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.90.0-1
1.100.0-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.100.0-1ubuntu1",
            "binary_name": "matrix-synapse"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-61672.json"