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openSUSE-SU-2026:21015-1

Опубликовано: 22 июн. 2026
Источник: suse-cvrf

Описание

Security update for dnsdist

This update for dnsdist fixes the following issues

  • CVE-2026-0396: crafted DNS queries can allow to inject HTML content (bsc#1261236).
  • CVE-2026-0397: CORS misconfiguration can lead to information disclosure (bsc#1261237).
  • CVE-2026-24028: crafted DNS response packet can lead to an out-of-bounds read (bsc#1261238).
  • CVE-2026-24029: HTTPS ACL bypass can allow clients to send DoH queries (bsc#1261239).
  • CVE-2026-24030: allocating too much memory while processing DNS can result in a denial of service (bsc#1261240).
  • CVE-2026-27853: crafted DNS responses can lead to an out-of-bounds write (bsc#1261241).
  • CVE-2026-27854: crafted DNS queries can be used to trigger a use-after-free (bsc#1261243).
  • CVE-2026-33254: Resource exhaustion via DoQ/DoH3 connections (bsc#1262538).
  • CVE-2026-33257: Insufficient input validation of internal webserver (bsc#1262536).
  • CVE-2026-33260: Insufficient input validation of internal webserver (bsc#1262537).
  • CVE-2026-33593: Denial of service via crafted DNSCrypt query (bsc#1262546).
  • CVE-2026-33594: Outgoing DoH excessive memory allocation (bsc#1262545).
  • CVE-2026-33595: DoQ/DoH3 excessive memory allocation (bsc#1262544).
  • CVE-2026-33596: TCP backend stream ID overflow (bsc#1262543).
  • CVE-2026-33597: PRSD detection denial of service (bsc#1262542).
  • CVE-2026-33598: Out-of-bounds read in cache inspection via Lua (bsc#1262541).
  • CVE-2026-33599: Out-of-bounds read in service discovery (bsc#1262540).
  • CVE-2026-33602: Off-by-one access when processing crafted UDP responses (bsc#1262539).

Changes for dnsdist:

  • Updated to 1.9.13

Список пакетов

openSUSE Leap 16.0
dnsdist-1.9.13-160000.1.1

Ссылки

Описание

An attacker might be able to inject HTML content into the internal web dashboard by sending crafted DNS queries to a DNSdist instance where domain-based dynamic rules have been enabled via either DynBlockRulesGroup:setSuffixMatchRule or DynBlockRulesGroup:setSuffixMatchRuleFFI.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

When the internal webserver is enabled (default is disabled), an attacker might be able to trick an administrator logged to the dashboard into visiting a malicious website and extract information about the running configuration from the dashboard. The root cause of the issue is a misconfiguration of the Cross-Origin Resource Sharing (CORS) policy.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

An attacker might be able to trigger an out-of-bounds read by sending a crafted DNS response packet, when custom Lua code uses newDNSPacketOverlay to parse DNS packets. The out-of-bounds read might trigger a crash, leading to a denial of service, or access unrelated memory, leading to potential information disclosure.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly closed, but in some cases the system might enter an out-of-memory state instead and terminate the process.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

An attacker might be able to trigger an out-of-bounds write by sending crafted DNS responses to a DNSdist using the DNSQuestion:changeName or DNSResponse:changeName methods in custom Lua code. In some cases the rewritten packet might become larger than the initial response and even exceed 65535 bytes, potentially leading to a crash resulting in denial of service.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

An attacker can create a large number of concurrent DoQ or DoH3 connections, causing unlimited memory allocation in DNSdist and leading to a denial of service. DOQ and DoH3 are disabled by default.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

A client can trigger excessive memory allocation by generating a lot of queries that are routed to an overloaded DoH backend, causing queries to accumulate into a buffer that will not be released until the end of the connection.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

A client can trigger excessive memory allocation by generating a lot of errors responses over a single DoQ and DoH3 connection, as some resources were not properly released until the end of the connection.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

PRSD detection denial of service

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

A cached crafted response can cause an out-of-bounds read if custom Lua code calls getDomainListByAddress() or getAddressListByDomain() on a packet cache.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

A rogue backend can send a crafted SVCB response to a Discovery of Designated Resolvers request, when requested via either the autoUpgrade (Lua) option to newServer or auto_upgrade (YAML) settings. DDR upgrade is not enabled by default.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки

Описание

A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service.

Затронутые продукты
openSUSE Leap 16.0:dnsdist-1.9.13-160000.1.1
Ссылки