Multiple vulnerabilities in AdGuardHome

1) Resource exhaustion

EUVDB-ID: #VU83928

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-39326

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources when handling HTTP chunked requests. A remote attacker can send specially crafted HTTP requests to the server and consume excessive memory resources.

Mitigation

Install update from vendor's website.

Vulnerable software versions

AdGuard Home: 0.107.0 - 0.108.0-b.50

External links

http://github.com/AdguardTeam/AdGuardHome/releases/tag/v0.108.0-b.51
http://github.com/AdguardTeam/AdGuardHome/releases/tag/v0.107.42

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

2) Input validation error

EUVDB-ID: #VU83255

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-45283

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to the path/filepath package does not recognize paths with a "??" prefix as Root Local Device path prefix. A local user can abuse such behavior and bypass implemented security restrictions.

Mitigation

Install update from vendor's website.

Vulnerable software versions

AdGuard Home: 0.107.0 - 0.108.0-b.50

External links

http://github.com/AdguardTeam/AdGuardHome/releases/tag/v0.108.0-b.51
http://github.com/AdguardTeam/AdGuardHome/releases/tag/v0.107.42

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.

3) Missing Encryption of Sensitive Data

EUVDB-ID: #VU83929

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-45285

CWE-ID: CWE-311 - Missing Encryption of Sensitive Data

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to a fallback to insecure git. Using "go get" to fetch a module with the ".git" suffix may unexpectedly fallback to the insecure "git://" protocol if the module is unavailable via the secure "https://" and  git+ssh://" protocols, even if GOINSECURE is not set for said module. This only affects users who are not using the module proxy and are fetching modules directly (i.e. OPROXY=off).

Mitigation

Install update from vendor's website.

Vulnerable software versions

AdGuard Home: 0.107.0 - 0.108.0-b.50

External links

http://github.com/AdguardTeam/AdGuardHome/releases/tag/v0.108.0-b.51
http://github.com/AdguardTeam/AdGuardHome/releases/tag/v0.107.42

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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