CVE-2018-20102 (GCVE-0-2018-20102)
Vulnerability from cvelistv5 – Published: 2018-12-12 17:00 – Updated: 2024-08-05 11:51
VLAI
EPSS
VEX
Summary
An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size.
Severity
7.5 (High)
CWE
- n/a
Assigner
References
7 references
| URL | Tags |
|---|---|
| http://git.haproxy.org/?p=haproxy.git%3Ba=commit%… | x_refsource_MISC |
| https://usn.ubuntu.com/3858-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://access.redhat.com/errata/RHBA-2019:0326 | vendor-advisoryx_refsource_REDHAT |
| http://www.securityfocus.com/bid/106223 | vdb-entryx_refsource_BID |
| https://access.redhat.com/errata/RHBA-2019:0327 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2019:1436 | vendor-advisoryx_refsource_REDHAT |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
Date Public
2018-12-12 00:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-05T11:51:19.257Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=efbbdf72992cd20458259962346044cafd9331c0"
},
{
"name": "USN-3858-1",
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU",
"x_transferred"
],
"url": "https://usn.ubuntu.com/3858-1/"
},
{
"name": "RHBA-2019:0326",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHBA-2019:0326"
},
{
"name": "106223",
"tags": [
"vdb-entry",
"x_refsource_BID",
"x_transferred"
],
"url": "http://www.securityfocus.com/bid/106223"
},
{
"name": "RHBA-2019:0327",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHBA-2019:0327"
},
{
"name": "RHSA-2019:1436",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2019:1436"
},
{
"name": "[debian-lts-announce] 20220530 [SECURITY] [DLA 3034-1] haproxy security update",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"datePublic": "2018-12-12T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-05-30T18:06:14.000Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "http://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=efbbdf72992cd20458259962346044cafd9331c0"
},
{
"name": "USN-3858-1",
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU"
],
"url": "https://usn.ubuntu.com/3858-1/"
},
{
"name": "RHBA-2019:0326",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHBA-2019:0326"
},
{
"name": "106223",
"tags": [
"vdb-entry",
"x_refsource_BID"
],
"url": "http://www.securityfocus.com/bid/106223"
},
{
"name": "RHBA-2019:0327",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHBA-2019:0327"
},
{
"name": "RHSA-2019:1436",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2019:1436"
},
{
"name": "[debian-lts-announce] 20220530 [SECURITY] [DLA 3034-1] haproxy security update",
"tags": [
"mailing-list",
"x_refsource_MLIST"
],
"url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "cve@mitre.org",
"ID": "CVE-2018-20102",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "n/a",
"version": {
"version_data": [
{
"version_value": "n/a"
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "n/a"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "http://git.haproxy.org/?p=haproxy.git;a=commit;h=efbbdf72992cd20458259962346044cafd9331c0",
"refsource": "MISC",
"url": "http://git.haproxy.org/?p=haproxy.git;a=commit;h=efbbdf72992cd20458259962346044cafd9331c0"
},
{
"name": "USN-3858-1",
"refsource": "UBUNTU",
"url": "https://usn.ubuntu.com/3858-1/"
},
{
"name": "RHBA-2019:0326",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHBA-2019:0326"
},
{
"name": "106223",
"refsource": "BID",
"url": "http://www.securityfocus.com/bid/106223"
},
{
"name": "RHBA-2019:0327",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHBA-2019:0327"
},
{
"name": "RHSA-2019:1436",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2019:1436"
},
{
"name": "[debian-lts-announce] 20220530 [SECURITY] [DLA 3034-1] haproxy security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2018-20102",
"datePublished": "2018-12-12T17:00:00.000Z",
"dateReserved": "2018-12-12T00:00:00.000Z",
"dateUpdated": "2024-08-05T11:51:19.257Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2018-20102",
"date": "2026-10-20",
"epss": "0.0415",
"percentile": "0.90759"
},
"nvd": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F4F0D169-E661-44C6-98E7-AA40B01D3706",
"versionEndIncluding": "1.8.14",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
"matchCriteriaId": "F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*",
"matchCriteriaId": "07C312A0-CD2C-4B9C-B064-6409B25C278F",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*",
"matchCriteriaId": "2F87326E-0B56-4356-A889-73D026DB1D4B",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size."
},
{
"lang": "es",
"value": "Se ha descubierto una lectura fuera de l\u00edmites en dns_validate_dns_response en dns.c en HAProxy hasta la versi\u00f3n 1.8.14. Debido a la falta de una comprobaci\u00f3n al validar respuestas DNS, los atacantes remotos pueden leer los 16 bits que corresponden a un registro AAAA de la parte no inicializada del b\u00fafer, pudiendo acceder a cualquier cosa que haya quedado en la pila, o incluso m\u00e1s all\u00e1 del final del b\u00fafer de 8193 bytes, dependiendo del valor de accepted_payload_size."
}
],
"id": "CVE-2018-20102",
"lastModified": "2024-11-21T04:00:52.920",
"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
}
],
"cvssMetricV30": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.0"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2018-12-12T17:29:00.247",
"references": [
{
"source": "cve@mitre.org",
"url": "http://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=efbbdf72992cd20458259962346044cafd9331c0"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/106223"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/errata/RHBA-2019:0326"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/errata/RHBA-2019:0327"
},
{
"source": "cve@mitre.org",
"url": "https://access.redhat.com/errata/RHSA-2019:1436"
},
{
"source": "cve@mitre.org",
"url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://usn.ubuntu.com/3858-1/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=efbbdf72992cd20458259962346044cafd9331c0"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/106223"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/errata/RHBA-2019:0326"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/errata/RHBA-2019:0327"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2019:1436"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://usn.ubuntu.com/3858-1/"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-125"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-28T05:35:41+00:00",
"cve": "CVE-2018-20102",
"id": "CVE-2018-20102",
"initial_release_date": "2018-12-12T00:00:00+00:00",
"product_status:fixed": "106",
"product_status:known_affected": "3",
"product_status:known_not_affected": "6",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "haproxy: Out-of-bounds read in dns.c:dns_validate_dns_response() allows for memory disclosure",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-20102.json",
"version": "3"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
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.
Loading…
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.