Packages
- unbound - validating, recursive, caching DNS resolver
Details
Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Unbound
incorrectly handled certain queries. A remote attacker could use this issue
to perform an amplification attack directed at a target. (CVE-2020-12662)
It was discovered that Unbound incorrectly handled certain malformed
answers. A remote attacker could possibly use this issue to cause Unbound
to crash, resulting in a denial of service. (CVE-2020-12663)
Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Unbound
incorrectly handled certain queries. A remote attacker could use this issue
to perform an amplification attack directed at a target. (CVE-2020-12662)
It was discovered that Unbound incorrectly handled certain malformed
answers. A remote attacker could possibly use this issue to cause Unbound
to crash, resulting in a denial of service. (CVE-2020-12663)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 20.04 focal | libunbound8 – 1.9.4-2ubuntu1.1 | ||
| unbound – 1.9.4-2ubuntu1.1 | |||
| 19.10 eoan | libunbound8 – 1.9.0-2ubuntu1.1 | ||
| unbound – 1.9.0-2ubuntu1.1 | |||
| 18.04 bionic | libunbound2 – 1.6.7-1ubuntu2.3 | ||
| unbound – 1.6.7-1ubuntu2.3 | |||
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