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CVE-2019-5611

Status Candidate

Overview

In FreeBSD 12.0-STABLE before r350828, 12.0-RELEASE before 12.0-RELEASE-p10, 11.3-STABLE before r350829, 11.3-RELEASE before 11.3-RELEASE-p3, and 11.2-RELEASE before 11.2-RELEASE-p14, a missing check in the function to arrange data in a chain of mbufs could cause data returned not to be contiguous. Extra checks in the IPv6 stack could catch the error condition and trigger a kernel panic, leading to a remote denial of service.

Related Files

FreeBSD Security Advisory - FreeBSD-SA-19:22.mbuf
Posted Aug 21, 2019
Authored by Clement LECIGNE | Site security.freebsd.org

FreeBSD Security Advisory - Due do a missing check in the code of m_pulldown(9) data returned may not be contiguous as requested by the caller. Extra checks in the IPv6 code catch the error condition and trigger a kernel panic leading to a remote DoS (denial-of-service) attack with certain Ethernet interfaces. At this point it is unknown if any other than the IPv6 code paths can trigger a similar condition.

tags | advisory, remote, kernel
systems | freebsd
advisories | CVE-2019-5611
MD5 | 9c1a75e0d06084604a7f5ea3a769e9e8
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