CVE-2020-25684
CVE-2020-25684
Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.
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.
CVSS 3.7 · Faible · EPSS 4,2% · Correctif disponible
- Publication
- Mise à jour
Pile logicielle: system
Produits et versions concernés
dnsmasq
- Versions du logiciel
- dnsmasq 2.83: Concernée
Aucun correctif publié
dnsmasq Debian:12
- Plages de versions concernées
- ECOSYSTEM: < 2.83-1
Mettez à jour vers 2.83-1
dnsmasq Debian:13
- Plages de versions concernées
- ECOSYSTEM: < 2.83-1
Mettez à jour vers 2.83-1
dnsmasq Debian:14
- Plages de versions concernées
- ECOSYSTEM: < 2.83-1
Mettez à jour vers 2.83-1
dnsmasq Ubuntu:Pro:14.04:LTS
- Versions du logiciel
- 2.66-4ubuntu1
- 2.67-1
- 2.68-1
- 2.68-1ubuntu0.1
- 2.68-1ubuntu0.2
- 2.68-1ubuntu0.2+esm1
- 2.68-1ubuntu0.2+esm2
- 2.68-1ubuntu0.2+esm3
- 2.68-1ubuntu0.2+esm5
- 2.68-1ubuntu0.2+esm6
- Plages de versions concernées
- ECOSYSTEM: (−∞, +∞)
Aucun correctif publié
dnsmasq Ubuntu:16.04:LTS
- Versions du logiciel
- 2.75-1
- 2.75-1ubuntu0.16.04.1
- 2.75-1ubuntu0.16.04.2
- 2.75-1ubuntu0.16.04.3
- 2.75-1ubuntu0.16.04.4
- 2.75-1ubuntu0.16.04.5
- Plages de versions concernées
- ECOSYSTEM: < 2.75-1ubuntu0.16.04.7
Mettez à jour vers 2.75-1ubuntu0.16.04.7
dnsmasq Ubuntu:18.04:LTS
- Versions du logiciel
- 2.78-1
- 2.78-3
- 2.79-1
- Plages de versions concernées
- ECOSYSTEM: < 2.79-1ubuntu0.2
Mettez à jour vers 2.79-1ubuntu0.2
dnsmasq Ubuntu:20.04:LTS
- Versions du logiciel
- 2.80-1ubuntu2
- 2.80-1ubuntu4
- 2.80-1.1ubuntu1
- Plages de versions concernées
- ECOSYSTEM: < 2.80-1.1ubuntu1.2
Mettez à jour vers 2.80-1.1ubuntu1.2
Sources originales
- https://bugzilla.redhat.com/show_bug.cgi?id=1889686
- https://www.jsof-tech.com/disclosures/dnspooq/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/
- https://security.gentoo.org/glsa/202101-17
- https://www.debian.org/security/2021/dsa-4844
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/
- https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html
- https://www.arista.com/en/support/advisories-notices/security-advisories/12135-security-advisory-61
- https://www.kb.cert.org/vuls/id/434904
- https://nvd.nist.gov/vuln/detail/CVE-2020-25684