Multiple vulnerabilities in Zyxel devices



Published: 2022-04-25
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2022-26413
CVE-2022-26414
CWE-ID CWE-78
CWE-119
Exploitation vector Local network
Public exploit N/A
Vulnerable software
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EMG5723-T50K
Hardware solutions / Routers for home users

VMG1312-T20B
Hardware solutions / Routers for home users

VMG3625-T50B
Hardware solutions / Routers for home users

VMG3927-B50A
Hardware solutions / Routers for home users

VMG3927-B60A
Hardware solutions / Routers for home users

VMG3927-T50K
Hardware solutions / Routers for home users

VMG8623-T50B
Hardware solutions / Routers for home users

VMG8825-B50A
Hardware solutions / Routers for home users

VMG8825-B50B
Hardware solutions / Routers for home users

VMG8825-T50K
Hardware solutions / Routers for home users

VMG8825-B60A
Hardware solutions / Routers for home users

VMG8825-B60B
Hardware solutions / Routers for home users

XMG3927-B50A
Hardware solutions / Routers for home users

XMG8825-B50A
Hardware solutions / Routers for home users

DX5401-B0
Hardware solutions / Routers for home users

EX3510-B0
Hardware solutions / Routers for home users

EX5401-B0
Hardware solutions / Routers for home users

EP240P
Hardware solutions / Routers for home users

PM7300-T0
Hardware solutions / Routers for home users

PMG5617-T20B2
Hardware solutions / Routers for home users

PX7501-B0
Hardware solutions / Routers for home users

EX5501-B0
Hardware solutions / Firmware

AX7501-B0
Hardware solutions / Firmware

PMG5317-T20B
Hardware solutions / Firmware

PMG5617GA
Hardware solutions / Firmware

PMG5622GA
Hardware solutions / Firmware

Vendor

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) OS Command Injection

EUVDB-ID: #VU62547

Risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-26413

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in the CGI program. A remote user on the local network can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

EMG5723-T50K: before V5.50(ABOM.7)C0

VMG1312-T20B: before V5.30(ABSB.5)C0

VMG3625-T50B: before V5.50(ABPM.6)C0

VMG3927-B50A: before V5.17(ABMT.6)C0

VMG3927-B60A: before V5.17(ABMT.6)C0

VMG3927-T50K: before V5.50(ABOM.7)C0

VMG8623-T50B: before V5.50(ABPM.6)C0

VMG8825-B50A: before V5.17(ABMT.6)C0

VMG8825-B50B: before V5.17(ABNY.7)C0

VMG8825-T50K: before V5.50(ABOM.7)C0

VMG8825-B60A: before V5.17(ABMT.6)C0

VMG8825-B60B: before V5.17(ABNY.7)C0

XMG3927-B50A: before V5.17(ABMT.6)C0

XMG8825-B50A: before V5.17(ABMT.6)C0

DX5401-B0: before V5.17(ABYO.1)C0

EX3510-B0: before V5.17(ABUP.4)C1

EX5401-B0: before V5.17(ABYO.1)C0

EX5501-B0: before V5.17(ABRY.2)C0

AX7501-B0: before V5.17(ABPC.1)C0

EP240P: before V5.40(ABVH.0)C0

PM7300-T0: before V5.42(ACBC.1)C0

PMG5317-T20B: before V5.40(ABKI.4)C0

PMG5617GA: before V5.40(ABNA.2)C0

PMG5617-T20B2: before V5.41(ACBB.1)C0

PMG5622GA: before V5.40(ABNB.2)C0

PX7501-B0: before V5.17(ABPC.1)C0


CPE2.3 External links

http://www.zyxel.com/support/OS-command-injection-and-buffer-overflow-vulnerabilities-of-CPE-and-ONTs.shtml

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Buffer overflow

EUVDB-ID: #VU62548

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-26414

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in some internal functions. A local user can trigger memory corruption and cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

EMG5723-T50K: before V5.50(ABOM.7)C0

VMG1312-T20B: before V5.30(ABSB.5)C0

VMG3625-T50B: before V5.50(ABPM.6)C0

VMG3927-B50A: before V5.17(ABMT.6)C0

VMG3927-B60A: before V5.17(ABMT.6)C0

VMG3927-T50K: before V5.50(ABOM.7)C0

VMG8623-T50B: before V5.50(ABPM.6)C0

VMG8825-B50A: before V5.17(ABMT.6)C0

VMG8825-B50B: before V5.17(ABNY.7)C0

VMG8825-T50K: before V5.50(ABOM.7)C0

VMG8825-B60A: before V5.17(ABMT.6)C0

VMG8825-B60B: before V5.17(ABNY.7)C0

XMG3927-B50A: before V5.17(ABMT.6)C0

XMG8825-B50A: before V5.17(ABMT.6)C0

DX5401-B0: before V5.17(ABYO.1)C0

EX3510-B0: before V5.17(ABUP.4)C1

EX5401-B0: before V5.17(ABYO.1)C0

EX5501-B0: before V5.17(ABRY.2)C0

AX7501-B0: before V5.17(ABPC.1)C0

EP240P: before V5.40(ABVH.0)C0

PM7300-T0: before V5.42(ACBC.1)C0

PMG5317-T20B: before V5.40(ABKI.4)C0

PMG5617GA: before V5.40(ABNA.2)C0

PMG5617-T20B2: before V5.41(ACBB.1)C0

PMG5622GA: before V5.40(ABNB.2)C0

PX7501-B0: before V5.17(ABPC.1)C0


CPE2.3 External links

http://www.zyxel.com/support/OS-command-injection-and-buffer-overflow-vulnerabilities-of-CPE-and-ONTs.shtml

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.



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