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Ubuntu 22.04 LTS USN-6370-1 Moderate: ModSecurity Denial Of Service

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Calendar Grey September 14, 2023
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Several security flaws within ModSecurity have been resolved across various Ubuntu versions. Protect your applications against these threats.
Several security issues were fixed in ModSecurity.

Summary

Several security issues were fixed in ModSecurity.

Software Description:

- modsecurity-apache: Tighten web applications security for Apache

Details:

It was discovered that ModSecurity incorrectly handled certain nested JSON

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

of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS

and Ubuntu 20.04 LTS. (CVE-2021-42717)

It was discovered that ModSecurity incorrectly handled certain HTTP

multipart requests. A remote attacker could possibly use this issue

to bypass ModSecurity restrictions. (CVE-2022-48279)

It was discovered that ModSecurity incorrectly handled certain file

uploads. A remote attacker could possibly use this issue to cause a

buffer overflow and a firewall failure. This issue only affected

Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.

(CVE-2023-24021)

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow web application Ubuntu update instructions ModSecurity

Update Instructions

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

Ubuntu 22.04 LTS (Available with Ubuntu Pro):
   libapache2-mod-security2        2.9.5-1ubuntu0.1~esm1

Ubuntu 20.04 LTS:
   libapache2-mod-security2        2.9.3-1ubuntu0.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   libapache2-mod-security2        2.9.2-1ubuntu0.1~esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   libapache2-mod-security2        2.9.0-1ubuntu0.1~esm1
   libapache2-modsecurity          2.9.0-1ubuntu0.1~esm1

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   libapache2-mod-security2        2.7.7-2ubuntu0.1~esm1
   libapache2-modsecurity          2.7.7-2ubuntu0.1~esm1

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

References

https://ubuntu.com/security/notices/USN-6370-1

CVE-2021-42717, CVE-2022-48279, CVE-2023-24021

Ubuntu Security Notice USN-6370-1

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow web application Ubuntu update instructions ModSecurity

Package Information

https://launchpad.net/ubuntu/+source/modsecurity-apache/2.9.3-1ubuntu0.1

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