FreeBSD ip6_setpktopt Use-After-Free Privilege Escalation

Discussion in 'News Aggregator' started by Packet Storm, 1 Aug 2020 at 6:29 AM.

  1. Packet Storm

    Packet Storm Guest

    This Metasploit module exploits a race and use-after-free vulnerability in the FreeBSD kernel IPv6 socket handling. A missing synchronization lock in the IPV6_2292PKTOPTIONS option handling in setsockopt permits racing ip6_setpktopt access to a freed ip6_pktopts struct. This exploit overwrites the ip6po_pktinfo pointer of a ip6_pktopts struct in freed memory to achieve arbitrary kernel read/write.

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