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Ubuntu YARA Advisory USN-8080-1 Multiple Denial of Service Issues

ubuntu
Calendar Grey March 9, 2026
Dist Ubuntu Esm H88
Several security issues in YARA are detailed in this advisory for Ubuntu versions 16.04, 18.04, and 20.04 requiring updates.
Several security issues were fixed in YARA.

Summary

Several security issues were fixed in YARA.

Software Description:

- yara: The pattern matching swiss knife for malware researchers

Details:

Kamil Frankowicz discovered that a number of YARA's functions

generated memory exceptions when processing specially crafted

rules or files. A remote attacker could possibly use these

issues to cause YARA to crash, resulting in a denial of

service. These issues only affected Ubuntu 16.04 LTS.

(CVE-2016-10211, CVE-2017-5923, CVE-2017-5924, CVE-2017-8294,

CVE-2017-8929, CVE-2017-9304, CVE-2017-9438, CVE-2017-9465)

Jurriaan Bremer discovered that YARA's yr_object_array_set_limit()

function could result in a heap buffer overflow when scanning

specially crafted .NET files. A remote attacker could possibly use

this issue to cause YARA to crash, resulting in a denial of service.

This issue only affected Ubuntu 16.04 LTS. (CVE-2017-11328)

It was discovered that YARA's yr_execute_code() function could

cause an out-of-bounds read or write when parsin...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow Ubuntu heap overflow YARA

Update Instructions

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

Ubuntu 20.04 LTS
  libyara3                        3.9.0-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  yara                            3.9.0-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libyara3                        3.7.1-1ubuntu2+esm1
                                  Available with Ubuntu Pro
  yara                            3.7.1-1ubuntu2+esm1
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libyara3                        3.4.0+dfsg-2ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  python-yara                     3.4.0+dfsg-2ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  python3-yara                    3.4.0+dfsg-2ubuntu0.1~esm1
                                  Available with Ubuntu Pro
  yara                            3.4.0+dfsg-2ubuntu0.1~esm1
                                  Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-8080-1

CVE-2016-10211, CVE-2017-11328, CVE-2017-5923, CVE-2017-5924,

CVE-2017-8294, CVE-2017-8929, CVE-2017-9304, CVE-2017-9438,

CVE-2017-9465, CVE-2018-12034, CVE-2018-12035, CVE-2018-19974,

CVE-2018-19975, CVE-2018-19976, CVE-2019-19648, CVE-2021-3402,

CVE-2021-45429

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8080-1

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow Ubuntu heap overflow YARA

Package Information

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