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CVE-2019-5597

Status Candidate

Overview

In FreeBSD 11.3-PRERELEASE and 12.0-STABLE before r347591, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in the pf IPv6 fragment reassembly logic incorrectly uses the last extension header offset from the last received packet instead of the first packet allowing maliciously crafted IPv6 packets to cause a crash or potentially bypass the packet filter.

Related Files

FreeBSD Security Advisory - FreeBSD-SA-19:05.pf
Posted May 15, 2019
Authored by Synacktiv | Site security.freebsd.org

FreeBSD Security Advisory - A bug in the pf(4) IPv6 fragment reassembly logic incorrectly uses the last extension header offset from the last received packet instead of from the first packet. Malicious IPv6 packets with different IPv6 extensions could cause a kernel panic or potentially a filtering rule bypass.

tags | advisory, kernel
systems | freebsd
advisories | CVE-2019-5597
MD5 | daaa024c3464b4ca624b91c213124dcb
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