From: Remi Gacogne Date: Fri, 12 Sep 2025 08:21:17 +0000 (+0200) Subject: dnsdist: Clarify that versions < 1.9.0 are not affected X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=refs%2Fpull%2F16135%2Fhead;p=thirdparty%2Fpdns.git dnsdist: Clarify that versions < 1.9.0 are not affected Signed-off-by: Remi Gacogne --- diff --git a/pdns/dnsdistdist/docs/security-advisories/powerdns-advisory-for-dnsdist-2025-05.rst b/pdns/dnsdistdist/docs/security-advisories/powerdns-advisory-for-dnsdist-2025-05.rst index f7304b1d2..b1bea80bb 100644 --- a/pdns/dnsdistdist/docs/security-advisories/powerdns-advisory-for-dnsdist-2025-05.rst +++ b/pdns/dnsdistdist/docs/security-advisories/powerdns-advisory-for-dnsdist-2025-05.rst @@ -5,20 +5,21 @@ PowerDNS Security Advisory 2025-05 for DNSdist: Denial of service via crafted Do - Date: 2025-09-18T12:00:00+02:00 - Discovery date: 2025-08-26T00:00:00+02:00 - Affects: PowerDNS DNSdist from 1.9.0 to 1.9.10, 2.0.0 -- Not affected: PowerDNS DNSdist 1.9.11, 2.0.1 +- Not affected: PowerDNS DNSdist < 1.9.0, 1.9.11, 2.0.1 - Severity: Low - Impact: Denial of service - Exploit: This problem can be triggered by an attacker crafting a DoH exchange - Risk of system compromise: None - Solution: Upgrade to patched version or use the h2o provider - CWE: CWE-835 -- CVSS: AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L -- Last affected: 2.0.0 -- First fixed: 2.0.1 +- CVSS: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L +- Last affected: 1.9.10,2.0.0 +- First fixed: 1.9.11,2.0.1 - Internal ID: 308 In some circumstances, when DNSdist is configured to use the nghttp2 library to process incoming DNS over HTTPS queries, an attacker might be able to cause a denial of service by crafting a DoH exchange that triggers an unbounded I/O read loop, causing an unexpected consumption of CPU resources. +The offending code was introduced in DNSdist 1.9.0-alpha1 so previous versions are not affected. `CVSS Score: 3.7 `__ -The remedy is: upgrade to the patched version, or switch to the h2o provider. +The remedy is: upgrade to a patched version, or switch to the h2o provider.