FastNetMon: IPv6 host counters map iterated without lock, racing concurrent inserts

Özet

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FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, FastNetMon's IPv6 top-talkers screen-draw thread in draw_table_ipv6() in src/fastnetmon_logic.cpp iterates ipv6_host_counters.average_speed_map without holding counter_map_mutex while recalculate_speed() inserts new keys and may rehash the same map. The race requires networks_list to include the targeted IPv6 range. It causes confirmed undefined behavior under load; a process crash is plausible but was not observed, so reliable denial of service has not been established. No fixed release is available as of this review.

Etkilenen sürümler1 yazılım

Kaynaklar5 kaynak

• CVE.org kaydı
• NVD kaydı
• github.com/…netmon/security/advisories/GHSA-phrw-2q76-5m7h Diğer
• github.com/pavel-odintsov/fastnetmon/pull/1087 Diğer
• github.com/…ommit/1294724ea931dc78fe545360f2193398bba35381 Diğer

Kayıt geçmişi

1. 6 Kas 2026 01:29Yayımlandı

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