ALPINE-CVE-2020-25684
- Source
- https://security.alpinelinux.org/vuln/CVE-2020-25684
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-25684.json
- JSON Data
- https://api.osv.dev/v1/vulns/ALPINE-CVE-2020-25684
- Upstream
- Published
- 2021-01-20T16:15:14Z
- Modified
- 2025-09-30T05:18:45.787802Z
- Severity
-
- 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
- Summary
- [none]
- 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.
- References
Affected packages
Alpine:v3.10
dnsmasq
Package
- Name
- dnsmasq
- Purl
- pkg:apk/alpine/dnsmasq?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed2.83-r0
Affected versions
2.*
2.46-r0
2.47-r0
2.49-r0
2.50-r0
2.50-r1
2.51-r0
2.52-r0
2.52-r1
2.55-r0
2.57-r0
2.58-r0
2.59-r0
2.59-r1
2.60-r0
2.61-r0
2.62-r0
2.63-r0
2.64-r0
2.65-r0
2.66-r0
2.66-r1
2.66-r2
2.67-r0
2.68-r0
2.69-r0
2.70-r0
2.71-r0
2.72-r0
2.72-r1
2.73-r0
2.75-r0
2.75-r1
2.75-r2
2.76-r0
2.76-r1
2.76-r2
2.76-r3
2.76-r4
2.77-r0
2.78-r0
2.78-r1
2.78-r2
2.79-r0
2.79-r1
2.79-r2
2.80-r0
2.80-r1
2.80-r2
2.80-r3
2.80-r4
Alpine:v3.11
dnsmasq
Package
- Name
- dnsmasq
- Purl
- pkg:apk/alpine/dnsmasq?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed2.83-r0
Affected versions
2.*
2.46-r0
2.47-r0
2.49-r0
2.50-r0
2.50-r1
2.51-r0
2.52-r0
2.52-r1
2.55-r0
2.57-r0
2.58-r0
2.59-r0
2.59-r1
2.60-r0
2.61-r0
2.62-r0
2.63-r0
2.64-r0
2.65-r0
2.66-r0
2.66-r1
2.66-r2
2.67-r0
2.68-r0
2.69-r0
2.70-r0
2.71-r0
2.72-r0
2.72-r1
2.73-r0
2.75-r0
2.75-r1
2.75-r2
2.76-r0
2.76-r1
2.76-r2
2.76-r3
2.76-r4
2.77-r0
2.78-r0
2.78-r1
2.78-r2
2.79-r0
2.79-r1
2.79-r2
2.80-r0
2.80-r1
2.80-r2
2.80-r3
2.80-r4
2.80-r5
Alpine:v3.12
dnsmasq
Package
- Name
- dnsmasq
- Purl
- pkg:apk/alpine/dnsmasq?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed2.83-r0
Affected versions
2.*
2.46-r0
2.47-r0
2.49-r0
2.50-r0
2.50-r1
2.51-r0
2.52-r0
2.52-r1
2.55-r0
2.57-r0
2.58-r0
2.59-r0
2.59-r1
2.60-r0
2.61-r0
2.62-r0
2.63-r0
2.64-r0
2.65-r0
2.66-r0
2.66-r1
2.66-r2
2.67-r0
2.68-r0
2.69-r0
2.70-r0
2.71-r0
2.72-r0
2.72-r1
2.73-r0
2.75-r0
2.75-r1
2.75-r2
2.76-r0
2.76-r1
2.76-r2
2.76-r3
2.76-r4
2.77-r0
2.78-r0
2.78-r1
2.78-r2
2.79-r0
2.79-r1
2.79-r2
2.80-r0
2.80-r1
2.80-r2
2.80-r3
2.80-r4
2.80-r5
2.81-r0
Alpine:v3.13
dnsmasq
Package
- Name
- dnsmasq
- Purl
- pkg:apk/alpine/dnsmasq?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed2.83-r0
Affected versions
2.*
2.46-r0
2.47-r0
2.49-r0
2.50-r0
2.50-r1
2.51-r0
2.52-r0
2.52-r1
2.55-r0
2.57-r0
2.58-r0
2.59-r0
2.59-r1
2.60-r0
2.61-r0
2.62-r0
2.63-r0
2.64-r0
2.65-r0
2.66-r0
2.66-r1
2.66-r2
2.67-r0
2.68-r0
2.69-r0
2.70-r0
2.71-r0
2.72-r0
2.72-r1
2.73-r0
2.75-r0
2.75-r1
2.75-r2
2.76-r0
2.76-r1
2.76-r2
2.76-r3
2.76-r4
2.77-r0
2.78-r0
2.78-r1
2.78-r2
2.79-r0
2.79-r1
2.79-r2
2.80-r0
2.80-r1
2.80-r2
2.80-r3
2.80-r4
2.80-r5
2.81-r0
2.81-r1
2.82-r0
Alpine:v3.14
dnsmasq
Package
- Name
- dnsmasq
- Purl
- pkg:apk/alpine/dnsmasq?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed2.83-r0
Affected versions
2.*
2.46-r0
2.47-r0
2.49-r0
2.50-r0
2.50-r1
2.51-r0
2.52-r0
2.52-r1
2.55-r0
2.57-r0
2.58-r0
2.59-r0
2.59-r1
2.60-r0
2.61-r0
2.62-r0
2.63-r0
2.64-r0
2.65-r0
2.66-r0
2.66-r1
2.66-r2
2.67-r0
2.68-r0
2.69-r0
2.70-r0
2.71-r0
2.72-r0
2.72-r1
2.73-r0
2.75-r0
2.75-r1
2.75-r2
2.76-r0
2.76-r1
2.76-r2
2.76-r3
2.76-r4
2.77-r0
2.78-r0
2.78-r1
2.78-r2
2.79-r0
2.79-r1
2.79-r2
2.80-r0
2.80-r1
2.80-r2
2.80-r3
2.80-r4
2.80-r5
2.81-r0
2.81-r1
2.82-r0