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CVE-2020-11810
LOW3.7
Description
An issue was discovered in OpenVPN 2.4.x before 2.4.9. An attacker can inject a data channel v2 (P_DATA_V2) packet using a victim's peer-id. Normally such packets are dropped, but if this packet arrives before the data channel crypto parameters have been initialized, the victim's connection will be dropped. This requires careful timing due to the small time window (usually within a few seconds) between the victim client connection starting and the server PUSH_REPLY response back to the client. This attack will only work if Negotiable Cipher Parameters (NCP) is in use.
Details CVE
Score CVSS v3.13.7
SeveriteLOW
Vecteur CVSSCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Vecteur d'attaqueNETWORK
ComplexiteHIGH
Privileges requisNONE
Interaction utilisateurNONE
Publie4/27/2020
Derniere modification11/21/2024
Sourcenvd
Observations honeypot0
Produits affectes
debian:debian_linuxfedoraproject:fedoraopenvpn:openvpn
Faiblesses (CWE)
CWE-362
References
https://bugzilla.suse.com/show_bug.cgi?id=1169925(cve@mitre.org)
https://community.openvpn.net/openvpn/ticket/1272(cve@mitre.org)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FGHHV4YZANZW45KZTJJGVGPFMSXYRCKZ/(cve@mitre.org)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JII7RYYYRBPQNEGGVSOXCM7JUZ43T3VH/(cve@mitre.org)
https://patchwork.openvpn.net/patch/1079/(cve@mitre.org)
https://security-tracker.debian.org/tracker/CVE-2020-11810(cve@mitre.org)
https://bugzilla.suse.com/show_bug.cgi?id=1169925(af854a3a-2127-422b-91ae-364da2661108)
https://community.openvpn.net/openvpn/ticket/1272(af854a3a-2127-422b-91ae-364da2661108)
https://github.com/OpenVPN/openvpn/commit/37bc691e7d26ea4eb61a8a434ebd7a9ae76225ab(af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html(af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FGHHV4YZANZW45KZTJJGVGPFMSXYRCKZ/(af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JII7RYYYRBPQNEGGVSOXCM7JUZ43T3VH/(af854a3a-2127-422b-91ae-364da2661108)
https://patchwork.openvpn.net/patch/1079/(af854a3a-2127-422b-91ae-364da2661108)
https://security-tracker.debian.org/tracker/CVE-2020-11810(af854a3a-2127-422b-91ae-364da2661108)
Correlations IOC
Aucune correlation enregistree
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