- Description
- 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.
- Source
- secalert@redhat.com
- NVD status
- Modified
CVSS 3.1
- Type
- Primary
- Base score
- 3.7
- Impact score
- 1.4
- Exploitability score
- 2.2
- Vector string
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- Severity
- LOW
CVSS 2.0
- Type
- Primary
- Base score
- 4.3
- Impact score
- 2.9
- Exploitability score
- 8.6
- Vector string
- AV:N/AC:M/Au:N/C:N/I:P/A:N
- Hype score
- Not currently trending
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F38115DF-0F5C-442D-83D4-1125AAB4E2B7",
"versionEndExcluding": "2.83"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956"
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2E5C0DA1-5E51-40F1-82FE-CF7E391C07E4",
"versionEndExcluding": "4.21.14m",
"versionStartIncluding": "4.21"
},
{
"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "206E795F-BFE9-4AB9-A35F-60AC911F38E4",
"versionEndExcluding": "4.22.9m",
"versionStartIncluding": "4.22"
},
{
"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6FA15712-F804-4060-99C0-7370D6111B83",
"versionEndExcluding": "4.23.7m",
"versionStartIncluding": "4.23"
},
{
"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "21A321F5-CB56-4258-BB30-6753EECB89DD",
"versionEndExcluding": "4.24.5m",
"versionStartIncluding": "4.24"
},
{
"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9445AF76-6AE4-46A6-A470-979ADBB19EE2",
"versionEndExcluding": "4.25.2f",
"versionStartIncluding": "4.25"
}
],
"operator": "OR"
}
]
}
]