FKIE_CVE-2021-45955
Vulnerability from fkie_nvd - Published: 2022-01-01 00:15 - Updated: 2024-11-21 06:33
Severity ?
Summary
Dnsmasq 2.86 has a heap-based buffer overflow in resize_packet (called from FuzzResizePacket and fuzz_rfc1035.c) because of the lack of a proper bounds check upon pseudo header re-insertion. NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge." However, a contributor states that a security patch (mentioned in 016162.html) is needed
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| thekelleys | dnsmasq | 2.86 |
{
"configurations": [
{
"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:a:thekelleys:dnsmasq:2.86:*:*:*:*:*:*:*",
"matchCriteriaId": "8F823B95-CBE5-4597-9DEE-8E9B833940A7",
"vulnerable": true
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"negate": false,
"operator": "OR"
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"cveTags": [
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"sourceIdentifier": "cve@mitre.org",
"tags": [
"disputed"
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"descriptions": [
{
"lang": "en",
"value": "Dnsmasq 2.86 has a heap-based buffer overflow in resize_packet (called from FuzzResizePacket and fuzz_rfc1035.c) because of the lack of a proper bounds check upon pseudo header re-insertion. NOTE: the vendor\u0027s position is that CVE-2021-45951 through CVE-2021-45957 \"do not represent real vulnerabilities, to the best of our knowledge.\" However, a contributor states that a security patch (mentioned in 016162.html) is needed"
},
{
"lang": "es",
"value": "** EN DISPUTA ** Dnsmasq versi\u00f3n 2.86 presenta un desbordamiento de buffer en la regi\u00f3n heap de la memoria en la funci\u00f3n resize_packet (llamado desde FuzzResizePacket y fuzz_rfc1035.c). NOTA: la posici\u00f3n del proveedor es que CVE-2021-45951 a CVE-2021-45957 \"no representan vulnerabilidades reales, seg\u00fan nuestro conocimiento\". Sin embargo, un colaborador afirma que es necesario un parche de seguridad (mencionado en 016162.html)"
}
],
"id": "CVE-2021-45955",
"lastModified": "2024-11-21T06:33:21.440",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 7.5,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
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"attackComplexity": "LOW",
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
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"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"exploitabilityScore": 3.9,
"impactScore": 5.9,
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"published": "2022-01-01T00:15:08.677",
"references": [
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"source": "cve@mitre.org",
"tags": [
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"url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35898"
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{
"source": "cve@mitre.org",
"tags": [
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"url": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-932.yaml"
},
{
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"url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html"
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"tags": [
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"url": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-932.yaml"
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"url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html"
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"url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html"
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],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
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"lang": "en",
"value": "CWE-787"
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"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
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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