Описание
Security update for dnsdist
This update for dnsdist fixes the following issues:
Update to 1.9.15.
Changes for dnsdist:
- https://www.dnsdist.org/changelog.html#change-1.9.15
- https://www.dnsdist.org/changelog.html#change-1.9.14
Security issues fixed:
- CVE-2026-40011: invalid output produced in the prometheus endpoint when a large number of crafted DNS queries are sent (bsc#1269204).
- CVE-2026-40208: processing of DoH3 queries can be delayed via DoH3 GET queries with an invalid DATA frames (bsc#1269207).
- CVE-2026-40209: outgoing TCP connections to backend can get stuck until a timeout occurs when specially crafted IXFR queries are sent (bsc#1269206).
- CVE-2026-40210: out-of-bounds read when
SetMacAddrActionis used can lead to uninitialized memory being sent over the network or a crash (bsc#1269205). - CVE-2026-40211: crafted DNS over HTTP/3 queries can trigger an exception that prevents memory from being freed and can lead to an OOM condition (bsc#1269203).
- CVE-2026-42004: crafted EDNS OPT record will be ignored by filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted (bsc#1269202).
- CVE-2026-42005: crafted web request can cause unlimited memory allocation in the internal web server and lead to a DoS (bsc#1269201).
Список пакетов
openSUSE Leap 16.0
Ссылки
- SUSE Security Ratings
- SUSE Bug 1269201
- SUSE Bug 1269202
- SUSE Bug 1269203
- SUSE Bug 1269204
- SUSE Bug 1269205
- SUSE Bug 1269206
- SUSE Bug 1269207
- SUSE CVE CVE-2026-40011 page
- SUSE CVE CVE-2026-40208 page
- SUSE CVE CVE-2026-40209 page
- SUSE CVE CVE-2026-40210 page
- SUSE CVE CVE-2026-40211 page
- SUSE CVE CVE-2026-42004 page
- SUSE CVE CVE-2026-42005 page
Описание
An attacker sending a large number of crafted DNS queries might be able to trigger a dynamic block being inserted with a value causing invalid output to be produced in the prometheus endpoint. The prometheus endpoint will then be rejected by the scraper until the dynamic block expires.
Затронутые продукты
Ссылки
- CVE-2026-40011
- SUSE Bug 1269204
Описание
An attacker might be able to delay the processing of DoH3 queries by sending DoH3 GET queries with an invalid DATA frame.
Затронутые продукты
Ссылки
- CVE-2026-40208
- SUSE Bug 1269207
Описание
An attacker might be able to cause outgoing TCP connections to backend to be stuck until a timeout occurs instead of being released immediately, by sending IXFR queries. This could be used to cause a denial of service if there is a limit to the number of concurrent connections to this backend, or if the process runs out of file descriptors.
Затронутые продукты
Ссылки
- CVE-2026-40209
- SUSE Bug 1269206
Описание
An out-of-bounds read might happen when SetMacAddrAction is used, potentially resulting in uninitialized memory being sent over the network or a crash.
Затронутые продукты
Ссылки
- CVE-2026-40210
- SUSE Bug 1269205
Описание
An attacker can send crafted DNS over HTTP/3 queries, triggering an exception that prevents some buffer from being freed right away. The buffer will be freed at the end of the QUIC connection, but on some setups it might be possible to open enough concurrent DoH3 streams to trigger an out-of-memory condition, resulting in a denial of service.
Затронутые продукты
Ссылки
- CVE-2026-40211
- SUSE Bug 1269203
Описание
An attacker can send a crafted EDNS OPT record that will be ignored by DNSdist's filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted, causing the backend to see the EDNS option(s) that DNSdist did not filter.
Затронутые продукты
Ссылки
- CVE-2026-42004
- SUSE Bug 1269202
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
Ссылки
- CVE-2026-42005
- SUSE Bug 1269201