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Dnsmasq vulnerabilities

Description

## Releases * Ubuntu 20.10 * Ubuntu 20.04 LTS * Ubuntu 18.04 ESM * Ubuntu 16.04 ESM ## Packages * dnsmasq \- Small caching DNS proxy and DHCP/TFTP server 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. (CVE-2020-25681, CVE-2020-25687) 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. (CVE-2020-25682, CVE-2020-25683) 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. (CVE-2020-25684) 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. (CVE-2020-25685) 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. (CVE-2020-25686) 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. (CVE-2019-14834)


Affected Package


OS OS Version Package Name Package Version
Ubuntu 20.10 dnsmasq 2.82-1ubuntu1.1
Ubuntu 20.10 dnsmasq-base 2.82-1ubuntu1.1
Ubuntu 20.10 dnsmasq-base-lua 2.82-1ubuntu1.1
Ubuntu 20.10 dnsmasq-utils 2.82-1ubuntu1.1
Ubuntu 20.04 dnsmasq 2.80-1.1ubuntu1.2
Ubuntu 20.04 dnsmasq-base 2.80-1.1ubuntu1.2
Ubuntu 20.04 dnsmasq-base-lua 2.80-1.1ubuntu1.2
Ubuntu 20.04 dnsmasq-utils 2.80-1.1ubuntu1.2
Ubuntu 18.04 dnsmasq 2.79-1ubuntu0.2
Ubuntu 18.04 dnsmasq-base 2.79-1ubuntu0.2
Ubuntu 18.04 dnsmasq-base-lua 2.79-1ubuntu0.2
Ubuntu 18.04 dnsmasq-utils 2.79-1ubuntu0.2
Ubuntu 16.04 dnsmasq 2.75-1ubuntu0.16.04.7
Ubuntu 16.04 dnsmasq-base 2.75-1ubuntu0.16.04.7
Ubuntu 16.04 dnsmasq-utils 2.75-1ubuntu0.16.04.7

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