Yüksek CVSS 7.5

CVE-2026-27857: Dovecot: denetimsiz kaynak tüketimi

Yayın: 27 Mart 2026 12:16 · Güncelleme: 6 Kasım 2026 10:18

Açıklama (NVD)

Sending "NOOP (((...)))" command with 4000 parenthesis open+close results in ~1MB extra memory usage. Longer commands will result in client disconnection. This 1 MB can be left allocated for longer time periods by not sending the command ending LF. So attacker could connect possibly from even a single IP and create 1000 connections to allocate 1 GB of memory, which would likely result in reaching VSZ limit and killing the process and its other proxied connections. Attacker could connect possibly from even a single IP and create 1000 connections to allocate 1 GB of memory, which would likely result in reaching VSZ limit and killing the process and its other proxied connections. Install fixed version, there is no other remediation. No publicly available exploits are known.

Özet bilgiler

Ürün: Dovecot Dovecot
CVSS v3.1: 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: %0,68 (yüzdelik 53)
CWE: CWE-400
Yama: Yok / bilinmiyor

Etkilenen sürümler

Ürün	Başlangıç	Bitiş	Düzeltildi
dovecot-dovecot	—	—	2.4.3
open-xchange-dovecot	—	—	2.3.22.1
open-xchange-dovecot	3.0.0	—	3.0.5
open-xchange-dovecot	3.1.0	—	3.1.4

Kaynaklar

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