Описание
Security update for dnsdist
This update for dnsdist fixes the following issues:
Update to version 1.9.12.
Security issues fixed:
- CVE-2026-0396: crafted DNS queries triggering domain-based dynamic rules can lead to HTML injection in the web dashboard (bsc#1261236).
- CVE-2026-0397: misconfiguration of the CORS policy can lead to information disclosure (bsc#1261237).
- CVE-2026-24028: crafted DNS packet parsed by Lua code using
newDNSPacketOverlaycan lead to an out-of-bounds read (bsc#1261238). - CVE-2026-24029: disabled option on a DNS over HTTPS nghttp2 frontend allows clients to bypass ACLs and send DoH queries (bsc#1261239).
- CVE-2026-24030: crafted DoQ and DoH3 queries can lead to unbounded memory allocation and DoS (bsc#1261240).
- CVE-2026-27853: crafted DNS responses sent to a DNSdist using certain methods in custom Lua code (
changeName) can lead to an out-of-bounds write (bsc#1261243). - CVE-2026-27854: crafted DNS queries sent to a DNSdist using the
DNSQuestion:getEDNSOptionsmethod in custom Lua code can lead to a use-after-free (bsc#1261241).
Список пакетов
SUSE Linux Enterprise Module for Basesystem 15 SP7
Ссылки
- Link for SUSE-SU-2026:1618-1
- E-Mail link for SUSE-SU-2026:1618-1
- SUSE Security Ratings
- SUSE Bug 1261236
- SUSE Bug 1261237
- SUSE Bug 1261238
- SUSE Bug 1261239
- SUSE Bug 1261240
- SUSE Bug 1261241
- SUSE Bug 1261243
- SUSE CVE CVE-2026-0396 page
- SUSE CVE CVE-2026-0397 page
- SUSE CVE CVE-2026-24028 page
- SUSE CVE CVE-2026-24029 page
- SUSE CVE CVE-2026-24030 page
- SUSE CVE CVE-2026-27853 page
- SUSE CVE CVE-2026-27854 page
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
Ссылки
- CVE-2026-0396
- SUSE Bug 1261236
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
Ссылки
- CVE-2026-0397
- SUSE Bug 1261237
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
Ссылки
- CVE-2026-24028
- SUSE Bug 1261238
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
Ссылки
- CVE-2026-24029
- SUSE Bug 1261239
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
Ссылки
- CVE-2026-24030
- SUSE Bug 1261240
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
Ссылки
- CVE-2026-27853
- SUSE Bug 1261241
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
Ссылки
- CVE-2026-27854
- SUSE Bug 1261243