Ubuntu Security Notice 4698-2 - USN-4698-1 fixed vulnerabilities in Dnsmasq. The updates introduced regressions in certain environments related to issues with multiple queries, and issues with retries. This update fixes the problem. Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled memory when sorting RRsets. A remote attacker could use this issue to cause Dnsmasq to hang, resulting in a denial of service, or possibly execute arbitrary code. Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled extracting certain names. A remote attacker could use this issue to cause Dnsmasq to hang, resulting in a denial of service, or possibly execute arbitrary code. Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly implemented address/port checks. A remote attacker could use this issue to perform a cache poisoning attack. Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly implemented query resource name checks. A remote attacker could use this issue to perform a cache poisoning attack. Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled multiple query requests for the same resource name. A remote attacker could use this issue to perform a cache poisoning attack. It was discovered that Dnsmasq incorrectly handled memory during DHCP response creation. A remote attacker could possibly use this issue to cause Dnsmasq to consume resources, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. Various other issues were also addressed.
e42a5bdd054f191f80e2ffa56b1efcc9969c7a22e49b0f34c75af8093966adecUbuntu Security Notice 4698-1 - Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled memory when sorting RRsets. A remote attacker could use this issue to cause Dnsmasq to hang, resulting in a denial of service, or possibly execute arbitrary code. Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled extracting certain names. A remote attacker could use this issue to cause Dnsmasq to hang, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.
9c1f6232a679d122ff8827bec18d6a2293e60660e241bd6df7f98f81f663017aRed Hat Security Advisory 2020-3878-01 - The dnsmasq packages contain Dnsmasq, a lightweight DNS forwarder and DHCP server. Issues addressed include a memory leak vulnerability.
76afa3a3f0ebf952fb0f690f107edd024352d37542ca9dcc0b31c6b2227d35acRed Hat Security Advisory 2020-1715-01 - The dnsmasq packages contain Dnsmasq, a lightweight DNS forwarder and DHCP server. Issues addressed include a memory leak vulnerability.
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