FreeBSD : FreeBSD -- jail_attach(2) relies on the caller to change the cwd (bba850fd-770e-11eb-b87a-901b0ef719ab)
high Nessus Plugin ID 146845
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VPR Score: 6.3
Synopsis
The remote FreeBSD host is missing one or more security-related updates.Description
When a process, such as jexec(8) or killall(1), calls jail_attach(2) to enter a jail, the jailed root can attach to it using ptrace(2) before the current working directory is changed. Impact : A process with superuser privileges running inside a jail could change the root directory outside of the jail, thereby gaining full read and writing access to all files and directories in the system.Solution
Update the affected packages.See Also
Plugin Details
Severity: High
ID: 146845
File Name: freebsd_pkg_bba850fd770e11ebb87a901b0ef719ab.nasl
Version: 1.3
Type: local
Family: FreeBSD Local Security Checks
Published: 2/25/2021
Updated: 4/6/2021
Dependencies: ssh_get_info.nasl
Configuration: Enable paranoid mode
Risk Information
Risk Factor: High
VPR Score: 6.3
CVSS Score Source: CVE-2020-25582
CVSS v2.0
Base Score: 8.5
Temporal Score: 6.3
Vector: AV:N/AC:L/Au:S/C:C/I:C/A:N
Temporal Vector: E:U/RL:OF/RC:C
CVSS v3.0
Base Score: 8.7
Temporal Score: 7.6
Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Temporal Vector: E:U/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:freebsd:freebsd:FreeBSD, cpe:/o:freebsd:freebsd
Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info, Settings/ParanoidReport
Exploit Ease: No known exploits are available
Patch Publication Date: 2/25/2021
Vulnerability Publication Date: 2/24/2021
Reference Information
CVE: CVE-2020-25582
FreeBSD: SA-21:05.jail_chdir