3.7 Low
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.005 Low
EPSS
Percentile
76.9%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Alpine | edge-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.10-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.11-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.12-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.13-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.14-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.15-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.16-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.17-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
Alpine | 3.18-main | noarch | dnsmasq | < 2.83-r0 | UNKNOWN |
3.7 Low
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.005 Low
EPSS
Percentile
76.9%