3.7
LOW
CVE-2020-25686
dnsmasq DNS Rebinding Vulnerability
Description

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.

INFO

Published Date :

Jan. 20, 2021, 5:15 p.m.

Last Modified :

Nov. 7, 2023, 3:20 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

1.4

Exploitability Score :

2.2
Public PoC/Exploit Available at Github

CVE-2020-25686 has a 16 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2020-25686 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Fedoraproject fedora
1 Debian debian_linux
1 Arista eos
1 Thekelleys dnsmasq
: Total Affected Vendor : 4 | Products : 4
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-25686.

URL Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1890125 Issue Tracking Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/
https://security.gentoo.org/glsa/202101-17 Third Party Advisory
https://www.arista.com/en/support/advisories-notices/security-advisories/12135-security-advisory-61 Third Party Advisory
https://www.debian.org/security/2021/dsa-4844 Third Party Advisory
https://www.jsof-tech.com/disclosures/dnspooq/ Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
CVEDB/awesome-cve-repo

None

Shell

Updated: 2 months ago
3 stars 2 fork 2 watcher
Born at : March 23, 2023, 4:32 a.m. This repo has been linked 435 different CVEs too.
Profile Photo
CVEDB/top

None

Shell

Updated: 2 months ago
1 stars 0 fork 0 watcher
Born at : March 19, 2023, 1:53 a.m. This repo has been linked 265 different CVEs too.
Profile Photo
criminalip/CIP-NSE-Script

The NSE Script plugin integrates with Criminal IP CTI search engine for network scanning, showing IP details like WHOIS, running products, versions, CVEs, etc.

criminalip-api cve cyberthreatintelligence ip portscan

Lua

Updated: 3 months, 3 weeks ago
10 stars 2 fork 2 watcher
Born at : Dec. 14, 2022, 1:29 p.m. This repo has been linked 5 different CVEs too.
Profile Photo
weeka10/-hktalent-TOP

None

Shell

Updated: 1 year, 8 months ago
2 stars 0 fork 0 watcher
Born at : Nov. 16, 2022, 9:38 a.m. This repo has been linked 256 different CVEs too.
Profile Photo
cyberanand1337x/bug-bounty-2022

None

Updated: 1 year, 10 months ago
0 stars 0 fork 0 watcher
Born at : Sept. 30, 2022, 6:29 p.m. This repo has been linked 253 different CVEs too.
Profile Photo
jbmihoub/all-poc

None

Shell

Updated: 3 months ago
1 stars 1 fork 1 watcher
Born at : Aug. 25, 2022, 12:16 a.m. This repo has been linked 250 different CVEs too.
Profile Photo
mboukhalfa/multironic

None

Shell

Updated: 2 years, 3 months ago
0 stars 0 fork 0 watcher
Born at : May 30, 2022, 3:52 p.m. This repo has been linked 3 different CVEs too.
Profile Photo
GhostTroops/TOP

TOP All bugbounty pentesting CVE-2023- POC Exp RCE example payload Things

bugbounty cve exp exploit payload poc rce vulnerability

Shell

Updated: 2 months ago
647 stars 116 fork 116 watcher
Born at : March 19, 2022, 1:54 a.m. This repo has been linked 273 different CVEs too.
Profile Photo
SexyBeast233/SecBooks

安全类各家文库大乱斗

HTML CSS JavaScript Go Python Shell C

Updated: 2 months ago
856 stars 214 fork 214 watcher
Born at : Feb. 15, 2022, 3:14 a.m. This repo has been linked 568 different CVEs too.
Profile Photo
tzwlhack/Vulnerability

None

Updated: 2 months ago
66 stars 14 fork 14 watcher
Born at : Oct. 13, 2021, 4:56 a.m. This repo has been linked 175 different CVEs too.
Profile Photo
klcheung99/CSCM28CW2

None

Perl Dockerfile Python

Updated: 3 years, 6 months ago
0 stars 0 fork 0 watcher
Born at : March 25, 2021, 7:44 a.m. This repo has been linked 7 different CVEs too.
Profile Photo
DNTYO/F5_Vulnerability

None

Updated: 3 years, 1 month ago
1 stars 0 fork 0 watcher
Born at : March 21, 2021, 3:33 a.m. This repo has been linked 73 different CVEs too.
Profile Photo
developer3000S/PoC-in-GitHub

None

Updated: 8 months, 1 week ago
33 stars 3 fork 3 watcher
Born at : March 12, 2021, 12:22 p.m. This repo has been linked 1063 different CVEs too.
Profile Photo
knqyf263/dnspooq

DNSpooq - dnsmasq cache poisoning (CVE-2020-25686, CVE-2020-25684, CVE-2020-25685)

Dockerfile Python

Updated: 2 months, 3 weeks ago
94 stars 36 fork 36 watcher
Born at : Jan. 23, 2021, 7:07 p.m. This repo has been linked 3 different CVEs too.
Profile Photo
AZ-X/pique

An advanced DNS stub with Freedom, Privacy and Security --- THRICE UPON A TIME

sni dns-over-https dns-over-tls windows pique repique dns linux dnscrypt reproducible-build golang116 cecpq2 crypto golang118

Go Makefile

Updated: 2 months, 1 week ago
21 stars 4 fork 4 watcher
Born at : May 5, 2020, 5:11 p.m. This repo has been linked 7 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-25686 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-25686 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/ [No types assigned]
    Added Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/ [No types assigned]
    Removed Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/
    Removed Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/
  • Modified Analysis by [email protected]

    Feb. 14, 2022

    Action Type Old Value New Value
    Changed Reference Type https://www.arista.com/en/support/advisories-notices/security-advisories/12135-security-advisory-61 No Types Assigned https://www.arista.com/en/support/advisories-notices/security-advisories/12135-security-advisory-61 Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* versions from (including) 4.21 up to (excluding) 4.21.14m *cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* versions from (including) 4.22 up to (excluding) 4.22.9m *cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* versions from (including) 4.23 up to (excluding) 4.23.7m *cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* versions from (including) 4.24 up to (excluding) 4.24.5m *cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* versions from (including) 4.25 up to (excluding) 4.25.2f
  • CVE Modified by [email protected]

    Jan. 25, 2022

    Action Type Old Value New Value
    Added Reference https://www.arista.com/en/support/advisories-notices/security-advisories/12135-security-advisory-61 [No Types Assigned]
  • Modified Analysis by [email protected]

    Feb. 22, 2021

    Action Type Old Value New Value
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/ Mailing List, Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* OR *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Feb. 20, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/ [No Types Assigned]
  • Modified Analysis by [email protected]

    Feb. 09, 2021

    Action Type Old Value New Value
    Changed Reference Type https://www.debian.org/security/2021/dsa-4844 No Types Assigned https://www.debian.org/security/2021/dsa-4844 Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Feb. 04, 2021

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2021/dsa-4844 [No Types Assigned]
  • Initial Analysis by [email protected]

    Jan. 26, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1890125 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1890125 Issue Tracking, Patch, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/ Mailing List, Third Party Advisory
    Changed Reference Type https://security.gentoo.org/glsa/202101-17 No Types Assigned https://security.gentoo.org/glsa/202101-17 Third Party Advisory
    Changed Reference Type https://www.jsof-tech.com/disclosures/dnspooq/ No Types Assigned https://www.jsof-tech.com/disclosures/dnspooq/ Third Party Advisory
    Added CWE NIST CWE-290
    Added CPE Configuration OR *cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:* versions up to (excluding) 2.83
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jan. 26, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/ [No Types Assigned]
    Added Reference https://security.gentoo.org/glsa/202101-17 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-25686 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-25686 weaknesses.

CAPEC-21: Exploitation of Trusted Identifiers Exploitation of Trusted Identifiers CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client CAPEC-59: Session Credential Falsification through Prediction Session Credential Falsification through Prediction CAPEC-60: Reusing Session IDs (aka Session Replay) Reusing Session IDs (aka Session Replay) CAPEC-94: Adversary in the Middle (AiTM) Adversary in the Middle (AiTM) CAPEC-459: Creating a Rogue Certification Authority Certificate Creating a Rogue Certification Authority Certificate CAPEC-461: Web Services API Signature Forgery Leveraging Hash Function Extension Weakness Web Services API Signature Forgery Leveraging Hash Function Extension Weakness CAPEC-473: Signature Spoof Signature Spoof CAPEC-476: Signature Spoofing by Misrepresentation Signature Spoofing by Misrepresentation CAPEC-667: Bluetooth Impersonation AttackS (BIAS) Bluetooth Impersonation AttackS (BIAS)
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.64 }} 0.10%

score

0.79690

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: