Published: 09/07/2020 Updated: 04/01/2022

CVSS v2 Base Score: 6.8 | Impact Score: 6.4 | Exploitability Score: 8.6

CVSS v3 Base Score: 8.1 | Impact Score: 5.9 | Exploitability Score: 2.2

VMScore: 605

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

In FreeBSD 12.1-STABLE before r359565, 12.1-RELEASE before p7, 11.4-STABLE before r362975, 11.4-RELEASE before p1, and 11.3-RELEASE before p11, missing synchronization in the IPV6_2292PKTOPTIONS socket option set handler contained a race condition allowing a malicious application to modify memory after being freed, possibly resulting in code execution.

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freebsd freebsd 11.3
freebsd freebsd 11.4
freebsd freebsd 12.1

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 fr ...

CWE-362 CWE-416 CWE-662 https://security.FreeBSD.org/advisories/FreeBSD-SA-20:20.ipv6.asc https://security.netapp.com/advisory/ntap-20200724-0002/http://packetstormsecurity.com/files/158695/FreeBSD-ip6_setpktopt-Use-After-Free-Privilege-Escalation.html https://nvd.nist.gov https://packetstormsecurity.com/files/158695/FreeBSD-ip6_setpktopt-Use-After-Free-Privilege-Escalation.html

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CVE-2020-7457

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