[USN-5922-1] FriBidi vulnerabilities

[Ian Constantin]

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Ubuntu Security Notice USN-5922-1
March 06, 2023

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

- Ubuntu 16.04 ESM

Summary:

Several security issues were fixed in fribidi.

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

Details:

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


unicode encoder, resulting in memory corruption. An attacker could possibly

potentially execute arbitrary code. (CVE-2022-25309)

It was discovered that FriBidi incorrectly handled empty input when removing
marks from unicode strings. An attacker could possibly 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 16.04 ESM:
  libfribidi-bin                  0.19.7-1ubuntu0.1~esm1
  libfribidi0                      0.19.7-1ubuntu0.1~esm1

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

References:
  https://ubuntu.com/security/notices/USN-5922-1
  CVE-2022-25308, CVE-2022-25309, CVE-2022-25310

It was discovered that FriBidi incorrectly validated input data to its CapRTL use this issue to cause FriBidi to crash, resulting in a denial of service, or

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