gsd-2020-25686
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
A flaw was found in dnsmasq before version 2.83. When receiving a query, dnsmasq does not check for an existing pending request for the same name and forwards a new request. By default, a maximum of 150 pending queries can be sent to upstream servers, so there can be at most 150 queries for the same name. This flaw allows an off-path attacker on the network to substantially reduce the number of attempts that it would have to perform to forge a reply and have it accepted by dnsmasq. This issue is mentioned in the "Birthday Attacks" section of RFC5452. If chained with CVE-2020-25684, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity.
Aliases
Aliases
{
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"id": "GSD-2020-25686",
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"https://www.suse.com/security/cve/CVE-2020-25686.html",
"https://www.debian.org/security/2021/dsa-4844",
"https://access.redhat.com/errata/RHSA-2021:0401",
"https://access.redhat.com/errata/RHSA-2021:0395",
"https://access.redhat.com/errata/RHSA-2021:0245",
"https://access.redhat.com/errata/RHSA-2021:0240",
"https://access.redhat.com/errata/RHSA-2021:0156",
"https://access.redhat.com/errata/RHSA-2021:0155",
"https://access.redhat.com/errata/RHSA-2021:0154",
"https://access.redhat.com/errata/RHSA-2021:0153",
"https://access.redhat.com/errata/RHSA-2021:0152",
"https://access.redhat.com/errata/RHSA-2021:0151",
"https://access.redhat.com/errata/RHSA-2021:0150",
"https://ubuntu.com/security/CVE-2020-25686",
"https://advisories.mageia.org/CVE-2020-25686.html",
"https://security.archlinux.org/CVE-2020-25686",
"https://linux.oracle.com/cve/CVE-2020-25686.html"
]
},
"gsd": {
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"exploitCode": "unknown",
"remediation": "unknown",
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"modified": "2023-12-13T01:21:57.445287Z",
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"impact": {
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"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
"version": "2.0"
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"exploitabilityScore": 8.6,
"impactScore": 2.9,
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"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
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"userInteractionRequired": false
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"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
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}
},
"lastModifiedDate": "2022-02-14T15:29Z",
"publishedDate": "2021-01-20T17:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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