etcd: `tlsListener.acceptLoop` spawns unbounded handshake goroutines with no deadline
21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 8.7epss 0.7%
probabilidade de exploração
0.7%top 49% das CVEs
exploração observada
nãonenhuma fonte reporta
etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a network attacker who can reach an etcd TLS listener can open many TCP connections and never send a ClientHello. In client/pkg/transport/listener_tls.go, each connection handled by tlsListener.acceptLoop spawns a goroutine that blocks indefinitely inside tls.Conn.Handshake() and remains tracked in the pending map. Unbounded goroutine and map growth can exhaust memory in the etcd process, causing loss of availability for the cluster and, when etcd backs Kubernetes, the control plane. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Produtos afetados
etcd-io · etcdReferências
https://github.com/etcd-io/etcd/commit/2e07efce9745004eb4773cffaada9b5cdf77cff2https://github.com/etcd-io/etcd/commit/89ff6d50796049d4f1136915ba21504b76e7e372https://github.com/etcd-io/etcd/commit/8e4dd0679a2c6b095d2a32a749fda2521c7809a3https://github.com/etcd-io/etcd/commit/f73cba7d920019f91a1ea1f6697833e42731f057https://github.com/etcd-io/etcd/pull/22130https://github.com/etcd-io/etcd/releases/tag/v3.5.33https://github.com/etcd-io/etcd/releases/tag/v3.6.14https://github.com/etcd-io/etcd/releases/tag/v3.7.1https://github.com/etcd-io/etcd/security/advisories/GHSA-6vch-q96h-7gc3