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Ubuntu Security Notice USN-5366-2
April 27, 2022

fribidi vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in fribidi.

Software Description:
- fribidi: Free Implementation of the Unicode BiDi algorithm (utility)

Details:

USN-5366-1 fixed several vulnerabilities in FriBidi. This update provides the
corresponding updates for Ubuntu 22.04 LTS.

Original advisory details:

It was discovered that FriBidi incorrectly handled processing of input strings
resulting in memory corruption. An attacker could use this issue to cause
FriBidi to crash, resulting in a denial of service, or potentially execute
arbitrary code. (CVE-2022-25308)

It was discovered that FriBidi incorrectly validated input data to its CapRTL
unicode encoder, resulting in memory corruption. An attacker could use this
issue to cause FriBidi to crash, resulting in a denial of service, or
potentially execute arbitrary code. (CVE-2022-25309)

It was discovered that FriBidi incorrectly handled empty input when removing
marks from unicode strings, resulting in a crash. An attacker could use this
to cause FriBidi to crash, resulting in a denial of service, or potentially execute
arbitrary code. (CVE-2022-25310)

Update instructions:

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

Ubuntu 22.04 LTS:
libfribidi-bin 1.0.8-2ubuntu3.1
libfribidi-dev 1.0.8-2ubuntu3.1
libfribidi0 1.0.8-2ubuntu3.1

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

References:
https://ubuntu.com/security/notices/USN-5366-2
https://ubuntu.com/security/notices/USN-5366-1
CVE-2022-25308, CVE-2022-25309, CVE-2022-25310

Package Information:
https://launchpad.net/ubuntu/+source/fribidi/1.0.8-2ubuntu3.1