Ubuntu update for networkd-dispatcher
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2022-29799 CVE-2022-29800 |
| CWE-ID | CWE-22 CWE-367 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Ubuntu Operating systems & Components / Operating system networkd-dispatcher (Ubuntu package) Operating systems & Components / Operating system package or component |
| Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Path traversal
EUVDB-ID: #VU62689
Risk: Low
CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-29799
CWE-ID:
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in OperationalState or the AdministrativeState. Since the states are used to build the script path, it is possible that a
state would contain directory traversal patterns (e.g. “../../”) to escape from the “/etc/networkd-dispatcher” base directory. A local user can abuse this vulnerability to bypass implemented security restrictions.
Update the affected package networkd-dispatcher to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 22.04
networkd-dispatcher (Ubuntu package): before 2.1-2~ubuntu20.04.2
External linkshttp://ubuntu.com/security/notices/USN-5395-1
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Time-of-check Time-of-use (TOCTOU) Race Condition
EUVDB-ID: #VU62690
Risk: Low
CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-29800
CWE-ID:
CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition between the scripts being discovered and them being run. An local user can abuse this vulnerability to replace scripts that networkd-dispatcher believes to be owned by root to ones that are not. Along with vulnerability #VU62689 (CVE-2022-29799) this allows privilege escalation by overwriting arbitrary files on the system.
Update the affected package networkd-dispatcher to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 22.04
networkd-dispatcher (Ubuntu package): before 2.1-2~ubuntu20.04.2
External linkshttp://ubuntu.com/security/notices/USN-5395-1
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
