UBUNTU-CVE-2025-34451

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Source
https://ubuntu.com/security/CVE-2025-34451
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-34451.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-34451
Upstream
Published
2025-12-18T22:15:00Z
Modified
2026-05-20T16:21:24.465821502Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

rofl0r/proxychains-ng versions up to and including 4.17 and prior to commit cc005b7 contain a stack-based buffer overflow vulnerability in the function proxyfromstring() located in src/libproxychains.c. When parsing crafted proxy configuration entries containing overly long username or password fields, the application may write beyond the bounds of fixed-size stack buffers, leading to memory corruption or crashes. This vulnerability may allow denial of service and, under certain conditions, could be leveraged for further exploitation depending on the execution environment and applied mitigations.

References

Affected packages

Ubuntu:18.04:LTS
proxychains-ng

Package

Name
proxychains-ng
Purl
pkg:deb/ubuntu/proxychains-ng?arch=source&distro=bionic

Affected ranges

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

Affected versions

4.*
4.12-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libproxychains4",
            "binary_version": "4.12-1"
        },
        {
            "binary_name": "proxychains4",
            "binary_version": "4.12-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-34451.json"
Ubuntu:20.04:LTS
proxychains-ng

Package

Name
proxychains-ng
Purl
pkg:deb/ubuntu/proxychains-ng?arch=source&distro=focal

Affected ranges

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

Affected versions

4.*
4.14-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libproxychains4",
            "binary_version": "4.14-1"
        },
        {
            "binary_name": "proxychains4",
            "binary_version": "4.14-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-34451.json"
Ubuntu:22.04:LTS
proxychains-ng

Package

Name
proxychains-ng
Purl
pkg:deb/ubuntu/proxychains-ng?arch=source&distro=jammy

Affected ranges

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

Affected versions

4.*
4.14-3
4.15-1
4.16-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libproxychains4",
            "binary_version": "4.16-1"
        },
        {
            "binary_name": "proxychains4",
            "binary_version": "4.16-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-34451.json"
Ubuntu:24.04:LTS
proxychains-ng

Package

Name
proxychains-ng
Purl
pkg:deb/ubuntu/proxychains-ng?arch=source&distro=noble

Affected ranges

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

Affected versions

4.*
4.16-3
4.16-4
4.17-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libproxychains4",
            "binary_version": "4.17-1"
        },
        {
            "binary_name": "proxychains4",
            "binary_version": "4.17-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-34451.json"
Ubuntu:25.10
proxychains-ng

Package

Name
proxychains-ng
Purl
pkg:deb/ubuntu/proxychains-ng?arch=source&distro=questing

Affected ranges

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

Affected versions

4.*
4.17-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libproxychains4",
            "binary_version": "4.17-3"
        },
        {
            "binary_name": "proxychains4",
            "binary_version": "4.17-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-34451.json"
Ubuntu:26.04:LTS
proxychains-ng

Package

Name
proxychains-ng
Purl
pkg:deb/ubuntu/proxychains-ng?arch=source&distro=resolute

Affected ranges

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

Affected versions

4.*
4.17-3
4.17-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libproxychains4",
            "binary_version": "4.17-3build1"
        },
        {
            "binary_name": "proxychains4",
            "binary_version": "4.17-3build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-34451.json"