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vulnerability bulletin 25283

NetBSD: denial of service via a IPsec AH packet for IPv6

Synthesis of the vulnerability

Impacted products: NetBSD.
Severity: 3/4.
Consequences: denial of service on server, denial of service on service.
Provenance: internet client.
Confidence: confirmed by the editor (5/5).
Creation date: 13/02/2018.
Identifiers: NetBSD-SA2018-003, VIGILANCE-VUL-25283.

Description of the vulnerability

An attacker can send an IPsec AH packet for IPv6 with an option of declared size 0 to a NetBSD host, in order to trigger an endless loop in the kernel and so an host freeze.
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