CVE-2020-25681
dnsmasq - security update
8.1
HIGH
CVSS 3.1
EPSS 45.4%
Description
A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in the way RRSets are sorted before validating with DNSSEC data. An attacker on the network, who can forge DNS replies such as that they are accepted as valid, could use this flaw to cause a buffer overflow with arbitrary data in a heap memory segment, possibly executing code on the machine. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
How to fix CVE-2020-25681
To remediate CVE-2020-25681, upgrade the affected package to a fixed version below.
- —upgrade to 2.83-r0 or later
- —upgrade to 2.83-1 or later
- —upgrade to 2.76-5+deb9u3 or later
- —upgrade to 2.80-1+deb10u1 or later
Is CVE-2020-25681 being exploited?
Moderate — EPSS is 45.4%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (4)
- from 0, < 2.83-r0
- from 0, < 2.83-1
- from 0, < 2.76-5+deb9u3
- from 0, < 2.80-1+deb10u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |