CVEvulnerability

CVE-2020-25681

8.1 HIGH Published 2021-01-20 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-01-20
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.1 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
8.3 HIGH — AV:N/AC:M/Au:N/C:P/I:P/A:C
Weaknesses
CWE-122

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.

Affected configurations

• thekelleys dnsmasq (< 2.83) • fedoraproject fedora 32 • fedoraproject fedora 33 • debian debian linux 9.0 • debian debian linux 10.0

Related

Weakness · CWE (1)

  • CWE-122 Heap-based Buffer Overflow weakness

References