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[email protected]CVE-2020-25681

HistoryJan 20, 2021 - 5:15 p.m.

CVE-2020-25681

2021-01-2017:15:12

CWE-122

[email protected]

web.nvd.nist.gov

1811

cve-2020-25681

dnsmasq

buffer overflow

code execution

dns

security vulnerability

nvd

8.3 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:P/I:P/A:C

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

8.3 High

AI Score

Confidence

High

0.159 Low

EPSS

Percentile

96.0%

JSON

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

Vulners

NVD

Node

dnsmasqdnsmasqRange≤2.83

VendorProductVersionCPE
dnsmasqdnsmasq*cpe:2.3:a:dnsmasq:dnsmasq:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
dnsmasq	dnsmasq	*	cpe:2.3:a:dnsmasq:dnsmasq::::::::

CNA Affected

[
  {
    "product": "dnsmasq",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "dnsmasq 2.83"
      }
    ]
  }
]