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

Ivan Jedek · Published 2023-10-22 · Updated 2024-02-27 · CVE-2023-46317

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALT-PU-2024-2060

BDU:2024-04315

CVE-2023-46317

DSA-5633-1

Affected Products

Alt Linux

Debian

Knot Resolver

References · 34

• 🔥 https://github.com/knqyf263/CVE-2023-50387 · Exploit
• https://safe-surf.ru/specialists/bulletins-nkcki/708901 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/708735 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-26249 · Security Note
• https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1448 · Patch
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-40188 · Security Note
• https://osv.dev/vulnerability/CVE-2023-46317 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32983 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-46317 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-46317 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2023-46317 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/717335 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-46317 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/708739 · Security Note
• https://bdu.fstec.ru/vul/2024-04315 · Security Note