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Ubuntu 18.04 LTS: USN-7239-1 critical: libmicrodns denial of service

ubuntu
Calendar Grey January 29, 2025
Dist Ubuntu Esm H88
A series of security flaws in libmicrodns have been resolved for Ubuntu 18.04 LTS through system updates.
Several security issues were fixed in libmicrodns.

Summary

Several security issues were fixed in libmicrodns.

Software Description:

- libmicrodns: minimal mDNS resolver and announcer library

Details:

It was discovered that libmicrodns could recursively follow the same

compression pointer, leading to an infinite loop. An attacker could

possibly use this issue to cause a denial of service. (CVE-2020-6071)

It was discovered that libmicrodns did not check the return value of the

rr_decode function, which could lead to a double free. An attacker could

possibly use this issue to execute arbitrary code. (CVE-2020-6072)

It was discovered that libmicrodns incorrectly handled certain inputs,

which could lead to an integer overflow. An attacker could possibly use

this issue to cause a denial of service. (CVE-2020-6073)

It was discovered that libmicrodns incorrectly handled certain inputs,

which could lead to a out-of-bounds read. An attacker could possibly use

this issue to cause a denial of service. (CVE-2020-6077)

It ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu memory leak libmicrodns

Update Instructions

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

Ubuntu 18.04 LTS
   libmicrodns0                    0.0.8-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro

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

References

  https://ubuntu.com/security/notices/USN-7239-1

  CVE-2020-6071, CVE-2020-6072, CVE-2020-6073, CVE-2020-6077,

  CVE-2020-6078, CVE-2020-6079, CVE-2020-6080

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7239-1

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu memory leak libmicrodns

Package Information

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