CVE-2023-50868
43Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 82%
exploitation probability
82%top 1% of all CVEs
observed exploitation
nono source reports it
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
n/a · n/aReferences
https://access.redhat.com/security/cve/CVE-2023-50868https://bugzilla.suse.com/show_bug.cgi?id=1219826https://datatracker.ietf.org/doc/html/rfc5155https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.htmlhttps://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1https://kb.isc.org/docs/cve-2023-50868https://lists.debian.org/debian-lts-announce/2024/02/msg00006.htmlhttps://lists.debian.org/debian-lts-announce/2024/05/msg00011.htmlhttps://lists.debian.org/debian-lts-announce/2024/09/msg00001.htmlhttps://lists.debian.org/debian-lts-announce/2024/11/msg00035.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/