A PEAR security update has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, 20.04 LTS, and 20.10.
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Ubuntu Security Notice USN-4723-1
February 08, 2021
php-pear vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
PEAR could be made to overwrite files as the administrator.
Software Description:
- php-pear: PHP Extension and Application Repository
Details:
It was discovered that PEAR incorrectly handled symbolic links in archives.
A remote attacker could possibly use this issue to execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.10:
php-pear 1:1.10.9+submodules+notgz-1ubuntu0.20.10.2
Ubuntu 20.04 LTS:
php-pear 1:1.10.9+submodules+notgz-1ubuntu0.20.04.2
Ubuntu 18.04 LTS:
php-pear 1:1.10.5+submodules+notgz-1ubuntu1.18.04.3
Ubuntu 16.04 LTS:
php-pear 1:1.10.1+submodules+notgz-6ubuntu0.3
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4723-1
CVE-2020-36193
Package Information:
https://launchpad.net/ubuntu/+source/php-pear/1:1.10.9+submodules+notgz-1ubuntu0.20.10.2
https://launchpad.net/ubuntu/+source/php-pear/1:1.10.9+submodules+notgz-1ubuntu0.20.04.2
https://launchpad.net/ubuntu/+source/php-pear/1:1.10.5+submodules+notgz-1ubuntu1.18.04.3
https://launchpad.net/ubuntu/+source/php-pear/1:1.10.1+submodules+notgz-6ubuntu0.3
