PT-2023-6887 · Powerdns+2 · Powerdns Recursor+2

Xiang Li · Published 2023-04-04 · Updated 2024-06-15 · CVE-2023-26437

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions PowerDNS Recursor versions through 4.6.5 PowerDNS Recursor versions through 4.7.4 PowerDNS Recursor versions through 4.8.3

Description The issue is related to a denial of service vulnerability in PowerDNS Recursor, where authoritative servers can be marked as unavailable. This can be exploited by a remote attacker to cause a denial of service.

Recommendations For PowerDNS Recursor versions through 4.6.5, update to a version later than 4.6.5 to resolve the issue. For PowerDNS Recursor versions through 4.7.4, update to a version later than 4.7.4 to resolve the issue. For PowerDNS Recursor versions through 4.8.3, update to a version later than 4.8.3 to resolve the issue. As a temporary workaround, consider restricting access to the PowerDNS Recursor service until a patch is available.

Fix

DoS

Improper Resource Release

Resource Exhaustion

Weakness Enumeration

CWE-404

CWE-400

Related Identifiers

BDU:2023-07902

CVE-2023-26437

OPENSUSE-SU-2023:0101-1

OPENSUSE-SU-2024:0048-1

OPENSUSE-SU-2024:12838-1

Affected Products

Debian

Powerdns Recursor

Red Os

References · 32

• https://security-tracker.debian.org/tracker/CVE-2023-26437 · Vendor Advisory
• https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2023-02.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-26437 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:0048-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2023:0101-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-07902 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-26437 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-26437 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/CN7VMRYKZHG2UDUAK326LXD3JY7NO3LR · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-26437 · Security Note
• http://repo.red-soft.ru/redos/7.3c/x86_64/updates · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-26437 · Security Note
• https://osv.dev/vulnerability/CVE-2023-26437 · Vendor Advisory
• https://security-tracker.debian.org/tracker/source-package/pdns-recursor · Vendor Advisory