Threat Level: green Handler on Duty: Didier Stevens

SANS ISC: FreeBSD packet filter (pf) DoS using fragments. SANS ISC InfoSec Forums

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FreeBSD packet filter (pf) DoS using fragments.
FreeBSD announced a patch for a vulnerability that can trigger a kernel panic due to crafted fragments and their handling in pf(4).

Workrounds are available: do not use "scrub fragment crop" or "scrub fragment drop-ovl" in the pf.conf(5)

More information:
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Swa Frantzen
Swa

760 Posts
Jan 25th 2006

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