FKIE_CVE-2006-2659
Vulnerability from fkie_nvd - Published: 2006-05-30 19:02 - Updated: 2026-06-16 22:25
Severity
Summary
libs/comverp.c in Courier MTA before 0.53.2 allows attackers to cause a denial of service (CPU consumption) via unknown vectors involving usernames that contain the "=" (equals) character, which is not properly handled during encoding.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| double_precision_incorporated | courier_mta | * | |
| double_precision_incorporated | courier_mta | 0.37.3 | |
| double_precision_incorporated | courier_mta | 0.38.1 | |
| double_precision_incorporated | courier_mta | 0.40 | |
| double_precision_incorporated | courier_mta | 0.43 | |
| double_precision_incorporated | courier_mta | 0.43.1 | |
| double_precision_incorporated | courier_mta | 0.43.2 | |
| double_precision_incorporated | courier_mta | 0.44 |
{
"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:double_precision_incorporated:courier_mta:*:*:*:*:*:*:*:*",
"matchCriteriaId": "5F80A7EC-ACB8-4768-9132-A8514B317AFB",
"versionEndIncluding": "0.44.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:double_precision_incorporated:courier_mta:0.37.3:*:*:*:*:*:*:*",
"matchCriteriaId": "A0869BB9-5308-406D-9107-EFAF25BCF96E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:double_precision_incorporated:courier_mta:0.38.1:*:*:*:*:*:*:*",
"matchCriteriaId": "FAF5F93E-53A5-4A27-8563-14C41FA6A6E6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:double_precision_incorporated:courier_mta:0.40:*:*:*:*:*:*:*",
"matchCriteriaId": "EF57BA8C-A955-4C50-B9CF-863CF056E0A4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:double_precision_incorporated:courier_mta:0.43:*:*:*:*:*:*:*",
"matchCriteriaId": "59676325-66F3-42EA-935B-1436961E3B50",
"vulnerable": true
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{
"criteria": "cpe:2.3:a:double_precision_incorporated:courier_mta:0.43.1:*:*:*:*:*:*:*",
"matchCriteriaId": "A801771F-0CBF-40DC-91F2-D4C885B28FD2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:double_precision_incorporated:courier_mta:0.43.2:*:*:*:*:*:*:*",
"matchCriteriaId": "D2464DEE-21EF-40B6-A691-6B8A89DED2B8",
"vulnerable": true
},
{
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"matchCriteriaId": "CA66C89A-F87F-4854-A358-2E8377DD431D",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
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}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "libs/comverp.c in Courier MTA before 0.53.2 allows attackers to cause a denial of service (CPU consumption) via unknown vectors involving usernames that contain the \"=\" (equals) character, which is not properly handled during encoding."
}
],
"evaluatorSolution": "This vulnerability is addressed in the following product release:\r\nDouble Precision Incorporated, Courier MTA, 0.53.2",
"id": "CVE-2006-2659",
"lastModified": "2026-06-16T22:25:28.817",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.8,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2006-05-30T19:02:00.000",
"references": [
{
"source": "cve@mitre.org",
"tags": [
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],
"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=368834"
},
{
"source": "cve@mitre.org",
"url": "http://secunia.com/advisories/20519"
},
{
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"url": "http://secunia.com/advisories/20548"
},
{
"source": "cve@mitre.org",
"url": "http://secunia.com/advisories/20792"
},
{
"source": "cve@mitre.org",
"url": "http://secunia.com/advisories/21350"
},
{
"source": "cve@mitre.org",
"url": "http://security.gentoo.org/glsa/glsa-200608-06.xml"
},
{
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"url": "http://securitytracker.com/id?1016248"
},
{
"source": "cve@mitre.org",
"tags": [
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],
"url": "http://www.courier-mta.org/beta/patches/verp-fix/README.txt"
},
{
"source": "cve@mitre.org",
"url": "http://www.debian.org/security/2006/dsa-1101"
},
{
"source": "cve@mitre.org",
"url": "http://www.securityfocus.com/bid/18345"
},
{
"source": "cve@mitre.org",
"url": "http://www.vupen.com/english/advisories/2006/2214"
},
{
"source": "cve@mitre.org",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/26998"
},
{
"source": "cve@mitre.org",
"url": "https://usn.ubuntu.com/294-1/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=368834"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/20519"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/20548"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/20792"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/21350"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://security.gentoo.org/glsa/glsa-200608-06.xml"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://securitytracker.com/id?1016248"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "http://www.courier-mta.org/beta/patches/verp-fix/README.txt"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.debian.org/security/2006/dsa-1101"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/bid/18345"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.vupen.com/english/advisories/2006/2214"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/26998"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://usn.ubuntu.com/294-1/"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
],
"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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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