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Ubuntu Security Notice USN-4179-1

Ubuntu Security Notice USN-4179-1
Posted Nov 8, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4179-1 - Alex Murray discovered a stack-based buffer overflow when handling a large number of unicode isolate directives. An attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, overflow, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-18397
SHA-256 | a64a3540d6115694264002f126e106dce0143b168f7c9e79d0e8f4245c44fcf5

Ubuntu Security Notice USN-4179-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4179-1
November 07, 2019

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

- Ubuntu 19.10
- Ubuntu 19.04

Summary:

Applications using FriBidi could be made to crash or run programs as your
login if it displayed specially crafted text.

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

Details:

Alex Murray discovered a stack-based buffer overflow when handling a large
number of unicode isolate directives. An attacker could use this to cause a
denial of service or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 19.10:
libfribidi0 1.0.5-3.1ubuntu0.19.10.1

Ubuntu 19.04:
libfribidi0 1.0.5-3.1ubuntu0.19.04.1

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

References:
https://usn.ubuntu.com/4179-1
CVE-2019-18397

Package Information:
https://launchpad.net/ubuntu/+source/fribidi/1.0.5-3.1ubuntu0.19.10.1
https://launchpad.net/ubuntu/+source/fribidi/1.0.5-3.1ubuntu0.19.04.1
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