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FreeBSD : go -- syscall, os/exec: unsanitized NUL in environment variables (26b1100a-5a27-11ed-abfe-29ac76ec31b5)

high Nessus Plugin ID 166856

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Synopsis

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

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 26b1100a-5a27-11ed-abfe-29ac76ec31b5 advisory.

 - Due to unsanitized NUL values, attackers may be able to maliciously set environment variables on Windows.
 In syscall.StartProcess and os/exec.Cmd, invalid environment variable values containing NUL values are not properly checked for. A malicious environment variable value can exploit this behavior to set a value for a different environment variable. For example, the environment variable string A=B\x00C=D sets the variables A=B and C=D. (CVE-2022-41716)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://groups.google.com/g/golang-dev/c/83nKqv2W1Dk/m/gEJdD5vjDwAJ

http://www.nessus.org/u?b8b4b0de

Plugin Details

Severity: High

ID: 166856

File Name: freebsd_pkg_26b1100a5a2711edabfe29ac76ec31b5.nasl

Version: 1.4

Type: local

Published: 11/2/2022

Updated: 11/30/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2022-41716

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:go118, p-cpe:/a:freebsd:freebsd:go119, cpe:/o:freebsd:freebsd

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/1/2022

Vulnerability Publication Date: 11/1/2022

Reference Information

CVE: CVE-2022-41716