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FreeBSD : FreeBSD -- IPv6 socket option race condition and use after free (c11ee146-c266-11ea-8659-901b0ef719ab)

high Nessus Plugin ID 138371

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The IPV6_2292PKTOPTIONS set handler was missing synchronization, so racing accesses could modify freed memory. Impact : A malicious user application could trigger memory corruption, leading to privilege escalation.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?dc849220

Plugin Details

Severity: High

ID: 138371

File Name: freebsd_pkg_c11ee146c26611ea8659901b0ef719ab.nasl

Version: 1.5

Type: local

Published: 7/10/2020

Updated: 2/23/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.6

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2020-7457

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.5

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:freebsd, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Settings/ParanoidReport, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/10/2020

Vulnerability Publication Date: 7/9/2020

Exploitable With

Metasploit (FreeBSD ip6_setpktopt Use-After-Free Privilege Escalation)

Reference Information

CVE: CVE-2020-7457

FreeBSD: SA-20:20.ipv6