PT-2023-9167 · Unknown+2 · Knot Resolver+2

Ivan Jedek · Publicado 2023-10-22 · Atualizado 2024-02-27 · CVE-2023-46317

Positive Technologies (AI Summary)

CVSS v2.0

7.8

Alta

Vetor base

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Knot Resolver versions prior to 5.7.0

Description The issue exists due to insufficient input validation in the DNS translator. It allows a remote attacker to cause a denial of service (DoS) by making multiple TCP connections. When the Knot Resolver receives certain nonsensical responses from servers, it performs many TCP reconnections.

Recommendations For versions prior to 5.7.0, update to version 5.7.0 or later to resolve the issue. As a temporary workaround, consider restricting the number of TCP reconnections to minimize the risk of exploitation.

Exploit

Correção

RCE

Enumeração de Fraquezas

CWE-20

Identificadores relacionados

ALT-PU-2024-2060

BDU:2024-04315

CVE-2023-46317

DSA-5633-1

Produtos afetados

Alt Linux

Debian

Knot Resolver

Referências · 34

• 🔥 https://github.com/knqyf263/CVE-2023-50387 · Exploit
• https://github.com/CZ-NIC/knot-resolver/commit/7aec8ebdf1428afcb7f5bc62764149ffeaf3d3fe · Nota
• https://github.com/CZ-NIC/knot-resolver/commit/49876a99ba9ee2dc7ca4b4bfb5431891974bdf10 · Nota
• https://github.com/Goethe-Universitat-Cybersecurity/NSEC3-Encloser-Attack · Nota
• https://safe-surf.ru/specialists/bulletins-nkcki/708901 · Nota de Segurança
• https://safe-surf.ru/specialists/bulletins-nkcki/708735 · Nota de Segurança
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-26249 · Nota de Segurança
• https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1448 · Correção
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-40188 · Nota de Segurança
• https://osv.dev/vulnerability/CVE-2023-46317 · Aviso do Fabricante
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32983 · Nota de Segurança
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-46317 · Aviso do Fabricante
• https://t.me/cibsecurity/72751 · Publicação no Telegram
• https://nvd.nist.gov/vuln/detail/CVE-2023-46317 · Nota de Segurança
• https://security-tracker.debian.org/tracker/CVE-2023-46317 · Aviso do Fabricante