gsd-2020-25684
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in the forward.c:reply_query() if the reply destination address/port is used by the pending forwarded queries. However, it does not use the address/port to retrieve the exact forwarded query, substantially reducing the number of attempts an attacker on the network would have to perform to forge a reply and get it accepted by dnsmasq. This issue contrasts with RFC5452, which specifies a query's attributes that all must be used to match a reply. This flaw allows an attacker to perform a DNS Cache Poisoning attack. If chained with CVE-2020-25685 or CVE-2020-25686, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2020-25684",
"description": "A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in the forward.c:reply_query() if the reply destination address/port is used by the pending forwarded queries. However, it does not use the address/port to retrieve the exact forwarded query, substantially reducing the number of attempts an attacker on the network would have to perform to forge a reply and get it accepted by dnsmasq. This issue contrasts with RFC5452, which specifies a query\u0027s attributes that all must be used to match a reply. This flaw allows an attacker to perform a DNS Cache Poisoning attack. If chained with CVE-2020-25685 or CVE-2020-25686, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity.",
"id": "GSD-2020-25684",
"references": [
"https://www.suse.com/security/cve/CVE-2020-25684.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-2020-25684",
"https://advisories.mageia.org/CVE-2020-25684.html",
"https://security.archlinux.org/CVE-2020-25684",
"https://linux.oracle.com/cve/CVE-2020-25684.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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"id": "GSD-2020-25684",
"modified": "2023-12-13T01:21:57.265733Z",
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"authentication": "NONE",
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"lastModifiedDate": "2022-02-14T14:56Z",
"publishedDate": "2021-01-20T16:15Z"
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}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.