Multiple vulnerabilities in Draytek routers



Risk High
Patch available YES
Number of vulnerabilities 6
CVE-ID CVE-2024-41334
CVE-2024-41339
CVE-2024-41335
CVE-2024-41336
CVE-2024-41338
CVE-2024-41340
CWE-ID CWE-295
CWE-94
CWE-203
CWE-256
CWE-476
CWE-434
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Vigor165
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor166
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2620 LTE
Hardware solutions / Routers & switches, VoIP, GSM, etc

VigorLTE 200n
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2133
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2135
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2762
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2765
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2766
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2832
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2860
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2860 LTE
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2862
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2862 LTE
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2865
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2865 LTE
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2865L-5G
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2866
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2866 LTE
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2915
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2925
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2925 LTE
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2926
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2926 LTE
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2927
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2927L-5G
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2952
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2952P
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2927 LTE
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor2962
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor3220
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor3910
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vigor3912
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor DrayTek Corp.

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Improper Certificate Validation

EUVDB-ID: #VU106351

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-41334

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to missing SSL certificate validation for APP Enforcement signature updates. A remote attacker can install specially crafted APPE modules from unofficial servers and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Vigor165: before 4.2.7

Vigor166: before 4.2.7

Vigor2620 LTE: before 3.9.8.9

VigorLTE 200n: before 3.9.8.9

Vigor2133: before 3.9.9

Vigor2135: before 4.4.5.1

Vigor2762: before 3.9.9

Vigor2765: before 4.4.5.1

Vigor2766: before 4.4.5.1

Vigor2832: before 3.9.9

Vigor2860: before 3.9.8

Vigor2860 LTE: before 3.9.8

Vigor2862: before 3.9.9.5

Vigor2862 LTE: before 3.9.9.5

Vigor2865: before 4.4.5.3

Vigor2865 LTE: before 4.4.5.3

Vigor2865L-5G: before 4.4.5.3

Vigor2866: before 4.4.5.3

Vigor2866 LTE: before 4.4.5.3

Vigor2915: before 4.4.5

Vigor2925: before 3.9.8

Vigor2925 LTE: before 3.9.8

Vigor2926: before 3.9.8

Vigor2926 LTE: before 3.9.8

Vigor2927: before 4.4.5.3

Vigor2927L-5G: before 4.4.5.3

Vigor2952: before 3.9.8.2

Vigor2952P: before 3.9.8.2

Vigor2927 LTE: before 4.4.5.3

Vigor2962: before 4.3.2.8

Vigor3220: before 3.9.8.2

Vigor3910: before 4.3.2.8

Vigor3912: before 4.3.6.1

CPE2.3 External links

https://draytek.com
https://medium.com/faraday/advisory-multiple-vulnerabilities-affecting-draytek-routers-78a6cb8b3946
https://www.draytek.com/about/security-advisory/denial-of-service,-information-disclosure,-and-code-execution-vulnerabilities


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

2) Code Injection

EUVDB-ID: #VU106352

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-41339

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

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

The vulnerability exists due to undocumented kernel module installation through CGI configuration endpoint. A remote attacker can execute arbitrary code on the target system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Vigor165: before 4.2.7

Vigor166: before 4.2.7

Vigor2620 LTE: before 3.9.8.9

VigorLTE 200n: before 3.9.8.9

Vigor2133: before 3.9.9

Vigor2135: before 4.4.5.1

Vigor2762: before 3.9.9

Vigor2765: before 4.4.5.1

Vigor2766: before 4.4.5.1

Vigor2832: before 3.9.9

Vigor2860: before 3.9.8

Vigor2860 LTE: before 3.9.8

Vigor2862: before 3.9.9.5

Vigor2862 LTE: before 3.9.9.5

Vigor2865: before 4.4.5.3

Vigor2865 LTE: before 4.4.5.3

Vigor2865L-5G: before 4.4.5.3

Vigor2866: before 4.4.5.3

Vigor2866 LTE: before 4.4.5.3

Vigor2915: before 4.4.5

Vigor2925: before 3.9.8

Vigor2925 LTE: before 3.9.8

Vigor2926: before 3.9.8

Vigor2926 LTE: before 3.9.8

Vigor2927: before 4.4.5.3

Vigor2927L-5G: before 4.4.5.3

Vigor2952: before 3.9.8.2

Vigor2952P: before 3.9.8.2

Vigor2927 LTE: before 4.4.5.3

Vigor2962: before 4.3.2.8

Vigor3220: before 3.9.8.2

Vigor3910: before 4.3.2.8

Vigor3912: before 4.3.6.1

CPE2.3 External links

https://draytek.com
https://medium.com/faraday/advisory-multiple-vulnerabilities-affecting-draytek-routers-78a6cb8b3946
https://www.draytek.com/about/security-advisory/denial-of-service,-information-disclosure,-and-code-...


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

3) Observable discrepancy

EUVDB-ID: #VU106353

Risk: High

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-41335

CWE-ID: CWE-203 - Observable discrepancy

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the affected products utilize insecure versions of the functions strcmp and memcmp to compare credentials. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Vigor165: before 4.2.7

Vigor166: before 4.2.7

Vigor2620 LTE: before 3.9.8.9

VigorLTE 200n: before 3.9.8.9

Vigor2133: before 3.9.9

Vigor2135: before 4.4.5.1

Vigor2762: before 3.9.9

Vigor2765: before 4.4.5.1

Vigor2766: before 4.4.5.1

Vigor2832: before 3.9.9

Vigor2860: before 3.9.8

Vigor2860 LTE: before 3.9.8

Vigor2862: before 3.9.9.5

Vigor2862 LTE: before 3.9.9.5

Vigor2865: before 4.4.5.3

Vigor2865 LTE: before 4.4.5.3

Vigor2865L-5G: before 4.4.5.3

Vigor2866: before 4.4.5.3

Vigor2866 LTE: before 4.4.5.3

Vigor2915: before 4.4.5

Vigor2925: before 3.9.8

Vigor2925 LTE: before 3.9.8

Vigor2926: before 3.9.8

Vigor2926 LTE: before 3.9.8

Vigor2927: before 4.4.5.3

Vigor2927L-5G: before 4.4.5.3

Vigor2952: before 3.9.8.2

Vigor2952P: before 3.9.8.2

Vigor2927 LTE: before 4.4.5.3

Vigor2962: before 4.3.2.8

Vigor3220: before 3.9.8.2

Vigor3910: before 4.3.2.8

Vigor3912: before 4.3.6.1

CPE2.3 External links

https://draytek.com
https://medium.com/faraday/advisory-multiple-vulnerabilities-affecting-draytek-routers-78a6cb8b3946
https://www.draytek.com/about/security-advisory/denial-of-service,-information-disclosure,-and-code-...


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

4) Unprotected storage of credentials

EUVDB-ID: #VU106354

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-41336

CWE-ID: CWE-256 - Unprotected Storage of Credentials

Exploit availability: No

Description

The vulnerability allows a local attacker to gain access to sensitive information.

The vulnerability exists due to application stored credentials in plain text. An attacker with physical access can dump credentials.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Vigor165: before 4.2.7

Vigor166: before 4.2.7

Vigor2620 LTE: before 3.9.8.9

VigorLTE 200n: before 3.9.8.9

Vigor2133: before 3.9.9

Vigor2135: before 4.4.5.1

Vigor2762: before 3.9.9

Vigor2765: before 4.4.5.1

Vigor2766: before 4.4.5.1

Vigor2832: before 3.9.9

Vigor2860: before 3.9.8

Vigor2860 LTE: before 3.9.8

Vigor2862: before 3.9.9.5

Vigor2862 LTE: before 3.9.9.5

Vigor2865: before 4.4.5.3

Vigor2865 LTE: before 4.4.5.3

Vigor2865L-5G: before 4.4.5.3

Vigor2866: before 4.4.5.3

Vigor2866 LTE: before 4.4.5.3

Vigor2915: before 4.4.5

Vigor2925: before 3.9.8

Vigor2925 LTE: before 3.9.8

Vigor2926: before 3.9.8

Vigor2926 LTE: before 3.9.8

Vigor2927: before 4.4.5.3

Vigor2927L-5G: before 4.4.5.3

Vigor2952: before 3.9.8.2

Vigor2952P: before 3.9.8.2

Vigor2927 LTE: before 4.4.5.3

Vigor2962: before 4.3.2.8

Vigor3220: before 3.9.8.2

Vigor3910: before 4.3.2.8

Vigor3912: before 4.3.6.1

CPE2.3 External links

https://draytek.com
https://medium.com/faraday/advisory-multiple-vulnerabilities-affecting-draytek-routers-78a6cb8b3946
https://www.draytek.com/about/security-advisory/denial-of-service,-information-disclosure,-and-code-...


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

5) NULL pointer dereference

EUVDB-ID: #VU106355

Risk: High

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-41338

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can send a specially crafted DHCP request and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Vigor165: before 4.2.7

Vigor166: before 4.2.7

Vigor2620 LTE: before 3.9.8.9

VigorLTE 200n: before 3.9.8.9

Vigor2133: before 3.9.9

Vigor2135: before 4.4.5.1

Vigor2762: before 3.9.9

Vigor2765: before 4.4.5.1

Vigor2766: before 4.4.5.1

Vigor2832: before 3.9.9

Vigor2860: before 3.9.8

Vigor2860 LTE: before 3.9.8

Vigor2862: before 3.9.9.5

Vigor2862 LTE: before 3.9.9.5

Vigor2865: before 4.4.5.3

Vigor2865 LTE: before 4.4.5.3

Vigor2865L-5G: before 4.4.5.3

Vigor2866: before 4.4.5.3

Vigor2866 LTE: before 4.4.5.3

Vigor2915: before 4.4.5

Vigor2925: before 3.9.8

Vigor2925 LTE: before 3.9.8

Vigor2926: before 3.9.8

Vigor2926 LTE: before 3.9.8

Vigor2927: before 4.4.5.3

Vigor2927L-5G: before 4.4.5.3

Vigor2952: before 3.9.8.2

Vigor2952P: before 3.9.8.2

Vigor2927 LTE: before 4.4.5.3

Vigor2962: before 4.3.2.8

Vigor3220: before 3.9.8.2

Vigor3910: before 4.3.2.8

Vigor3912: before 4.3.6.1

CPE2.3 External links

https://draytek.com
https://medium.com/faraday/advisory-multiple-vulnerabilities-affecting-draytek-routers-78a6cb8b3946
https://www.draytek.com/about/security-advisory/denial-of-service,-information-disclosure,-and-code-...


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

6) Arbitrary file upload

EUVDB-ID: #VU106357

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-41340

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload. A remote attacker can upload specially crafted APP Enforcement modules and execute arbitrary code on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Vigor165: before 4.2.7

Vigor166: before 4.2.7

Vigor2620 LTE: before 3.9.8.9

VigorLTE 200n: before 3.9.8.9

Vigor2133: before 3.9.9

Vigor2135: before 4.4.5.1

Vigor2762: before 3.9.9

Vigor2765: before 4.4.5.1

Vigor2766: before 4.4.5.1

Vigor2832: before 3.9.9

Vigor2860: before 3.9.8

Vigor2860 LTE: before 3.9.8

Vigor2862: before 3.9.9.5

Vigor2862 LTE: before 3.9.9.5

Vigor2865: before 4.4.5.3

Vigor2865 LTE: before 4.4.5.3

Vigor2865L-5G: before 4.4.5.3

Vigor2866: before 4.4.5.3

Vigor2866 LTE: before 4.4.5.3

Vigor2915: before 4.4.5

Vigor2925: before 3.9.8

Vigor2925 LTE: before 3.9.8

Vigor2926: before 3.9.8

Vigor2926 LTE: before 3.9.8

Vigor2927: before 4.4.5.3

Vigor2927L-5G: before 4.4.5.3

Vigor2952: before 3.9.8.2

Vigor2952P: before 3.9.8.2

Vigor2927 LTE: before 4.4.5.3

Vigor2962: before 4.3.2.8

Vigor3220: before 3.9.8.2

Vigor3910: before 4.3.2.8

Vigor3912: before 4.3.6.1

CPE2.3 External links

https://draytek.com
https://medium.com/faraday/advisory-multiple-vulnerabilities-affecting-draytek-routers-78a6cb8b3946
https://www.draytek.com/about/security-advisory/denial-of-service,-information-disclosure,-and-code-...


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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