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Ubuntu 18.04, 16.04 LTS: USN-6164-2 Critical: c-ares Denial Of Service

ubuntu
Calendar Grey September 11, 2023
Dist Ubuntu Esm H88
On October 10, 2023, a new patch for c-ares highlights significant vulnerabilities in Debian 9 and 10.
Several security issues were fixed in c-ares.

Summary

Several security issues were fixed in c-ares.

Software Description:

- c-ares: library for asynchronous name resolution

Details:

USN-6164-1 fixed several vulnerabilities in c-ares. This update provides

the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

Hannes Moesl discovered that c-ares incorrectly handled certain ipv6

addresses. An attacker could use this issue to cause c-ares to crash,

resulting in a denial of service, or possibly execute arbitrary code.

(CVE-2023-31130)

Xiang Li discovered that c-ares incorrectly handled certain UDP packets. A

remote attacker could possibly use this issue to cause c-res to crash,

resulting in a denial of service. (CVE-2023-32067)

Topics%20covered

Topics Covered

security advisory denial of service update Ubuntu c-ares

Update Instructions

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  libc-ares2                      1.14.0-1ubuntu0.2+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  libc-ares2                      1.10.0-3ubuntu0.2+esm2

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

References

https://ubuntu.com/security/notices/USN-6164-2

https://ubuntu.com/security/notices/USN-6164-1

CVE-2023-31130, CVE-2023-32067

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6164-2

Topics%20covered

Topics Covered

security advisory denial of service update Ubuntu c-ares

Package Information

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