FKIE_CVE-2008-1618
Vulnerability from fkie_nvd - Published: 2008-04-07 18:44 - Updated: 2026-06-16 22:52
Severity
Summary
The PPTP VPN service in Watchguard Firebox before 10, when performing the MS-CHAPv2 authentication handshake, generates different error codes depending on whether the username is valid or invalid, which allows remote attackers to enumerate valid usernames.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| watchguard | firebox_pptp_vpn | 4.9 | |
| watchguard | firebox_pptp_vpn | 5.0 |
{
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "cve@mitre.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:watchguard:firebox_pptp_vpn:4.9:*:*:*:*:*:*:*",
"matchCriteriaId": "74232A36-AA69-4E9E-9226-CFF4CFECB6C0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:watchguard:firebox_pptp_vpn:5.0:*:*:*:*:*:*:*",
"matchCriteriaId": "53E189B5-EE45-4E2E-A87F-A8BBD414AAA9",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The PPTP VPN service in Watchguard Firebox before 10, when performing the MS-CHAPv2 authentication handshake, generates different error codes depending on whether the username is valid or invalid, which allows remote attackers to enumerate valid usernames."
},
{
"lang": "es",
"value": "El servicio PPTP VPN en Watchguard Firebox versiones anteriores a 10, al realizar la negociaci\u00f3n de autenticaci\u00f3n MS-CHAPv2, genera diferentes c\u00f3digos de error dependiendo de si el nombre de usuario es v\u00e1lido o no v\u00e1lido, lo que permite a los atacantes remotos enumerar nombres de usuario comprobados."
}
],
"id": "CVE-2008-1618",
"lastModified": "2026-06-16T22:52:06.640",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 5.0,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2008-04-07T18:44:00.000",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Vendor Advisory"
],
"url": "http://secunia.com/advisories/29708"
},
{
"source": "cve@mitre.org",
"tags": [
"Exploit",
"Patch"
],
"url": "http://www.mwrinfosecurity.com/publications/mwri_watchguard-firebox-pptp-vpn-user-enumeration-advisory_2008-04-04.pdf"
},
{
"source": "cve@mitre.org",
"url": "http://www.osvdb.org/44218"
},
{
"source": "cve@mitre.org",
"url": "http://www.securityfocus.com/bid/28619"
},
{
"source": "cve@mitre.org",
"url": "http://www.securitytracker.com/id?1019796"
},
{
"source": "cve@mitre.org",
"tags": [
"Vendor Advisory"
],
"url": "http://www.vupen.com/english/advisories/2008/1152/references"
},
{
"source": "cve@mitre.org",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/41683"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "http://secunia.com/advisories/29708"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Patch"
],
"url": "http://www.mwrinfosecurity.com/publications/mwri_watchguard-firebox-pptp-vpn-user-enumeration-advisory_2008-04-04.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.osvdb.org/44218"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/bid/28619"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securitytracker.com/id?1019796"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "http://www.vupen.com/english/advisories/2008/1152/references"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/41683"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-200"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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