PT-2023-23349 · Smartdns · Smartdns

Huáscar · Published 2023-04-28 · Updated 2025-01-31 · CVE-2023-31470

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions SmartDNS versions through 41 before 56d0332

Description The issue is caused by a stack-based buffer overflow in the dns encode domain function in the dns.c file, allowing an out-of-bounds write via a crafted DNS request. This can be exploited by sending a specifically crafted DNS request to the affected system.

Recommendations For SmartDNS versions through 41 before 56d0332, update to a version that includes the fix for the buffer overflow in the dns encode domain function. As a temporary workaround, consider restricting access to the dns encode domain function in the dns.c file until a patch is available.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2023-31470

Affected Products

Smartdns

References · 12

• 🔥 https://github.com/pymumu/smartdns/issues/1378 · Exploit
• https://github.com/pymumu/smartdns/commit/56d0332bf91104cfc877635f6c82e9348587df04 · Patch
• https://ubuntu.com/security/CVE-2023-31470 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-31470 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-31470 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-31470 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-31470 · Vendor Advisory
• https://t.me/cvenotify/49961 · Telegram Post
• https://t.me/cvenotify/49368 · Telegram Post
• https://t.me/cibsecurity/63098 · Telegram Post
• https://t.me/cvenotify/109456 · Telegram Post
• https://t.me/cvenotify/100141 · Telegram Post