Remote code execution in SmartDNS



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-31470
CWE-ID CWE-787
Exploitation vector Network
Public exploit N/A
Vulnerable software
 smartdns
Server applications / DNS servers

Vendor Nick Peng

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Out-of-bounds write

EUVDB-ID: #VU105997

Risk: High

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-31470

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing DNS responses within the _dns_encode_domain() function in dns.c. A remote attacker can send a specially crafted DNS response to the server, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

smartdns: 18 - 41

CPE2.3 External links

https://github.com/pymumu/smartdns/commit/56d0332bf91104cfc877635f6c82e9348587df04
https://github.com/pymumu/smartdns/issues/1378


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 application 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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