Vulnerability Details : CVE-2020-25684
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.
Products affected by CVE-2020-25684
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
- cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
Threat overview for CVE-2020-25684
Top countries where our scanners detected CVE-2020-25684
Top open port discovered on systems with this issue
53
IPs affected by CVE-2020-25684 1,109,700
Threat actors abusing to this issue?
Yes
Find out if you* are
affected by CVE-2020-25684!
*Directly or indirectly through your vendors, service providers and 3rd parties.
Powered by
attack surface intelligence
from SecurityScorecard.
Exploit prediction scoring system (EPSS) score for CVE-2020-25684
0.42%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 74 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-25684
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
|
3.7
|
LOW | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
2.2
|
1.4
|
NIST |
CWE ids for CVE-2020-25684
-
The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.Assigned by: secalert@redhat.com (Secondary)
References for CVE-2020-25684
-
https://bugzilla.redhat.com/show_bug.cgi?id=1889686
1889686 – (CVE-2020-25684) CVE-2020-25684 dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attackerIssue Tracking;Patch;Third Party Advisory
-
https://www.jsof-tech.com/disclosures/dnspooq/
DNSPOOQ - JSOFThird Party Advisory
-
https://security.gentoo.org/glsa/202101-17
Dnsmasq: Multiple vulnerabilities (GLSA 202101-17) — Gentoo securityThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html
[SECURITY] [DLA 2604-1] dnsmasq security updateMailing List;Third Party Advisory
-
https://www.arista.com/en/support/advisories-notices/security-advisories/12135-security-advisory-61
Security Advisory 0061 - AristaThird Party Advisory
-
https://www.debian.org/security/2021/dsa-4844
Debian -- Security Information -- DSA-4844-1 dnsmasqThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/
[SECURITY] Fedora 32 Update: dnsmasq-2.84-1.fc32 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/
[SECURITY] Fedora 33 Update: dnsmasq-2.83-1.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
Jump to