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Ubuntu 20.10 USN-4638-1 Critical: c-ares DNS Denial Of Service Advisory

ubuntu
Calendar Grey November 19, 2020
Dist Ubuntu Esm H88
Debian Security Advisory DSA-4820-1 concerns a libcurl vulnerability enabling potential DoS via specially crafted HTTP requests.
c-ares could be made to denial of service if it received a specially crafted DNS request.

Summary

c-ares could be made to denial of service if it received a specially crafted

DNS request.

Software Description:

- c-ares: library for asynchronous name resolution

Details:

It was discovered that c-ares incorrectly handled certain DNS requests.

An attacker could possibly use this issue to cause a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service software update Ubuntu c-ares

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
  libc-ares2                      1.16.1-1ubuntu0.1

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4638-1

CVE-2020-8277

Severity
critical
Lowest
Low
Medium
High
Critical

November 19, 2020

Topics%20covered

Topics Covered

security advisory denial of service software update Ubuntu c-ares

Package Information

https://launchpad.net/ubuntu/+source/c-ares/1.16.1-1ubuntu0.1

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