USN-5300-2: PHP vulnerabilities

Releases

• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• php7.2 - HTML-embedded scripting language interpreter
• php7.4 - HTML-embedded scripting language interpreter

Details

USN-5300-1 fixed vulnerabilities in PHP. This update provides the
corresponding updates for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

Original advisory details:

It was discovered that PHP incorrectly handled certain scripts.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2015-9253, CVE-2017-8923, CVE-2017-9118, CVE-2017-9120)

It was discovered that PHP incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a denial of service,
or possibly obtain sensitive information. (CVE-2017-9119)

It was discovered that PHP incorrectly handled certain scripts with XML
parsing functions.
An attacker could possibly use this issue to obtain sensitive information.
(CVE-2021-21707)

Update instructions

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

Ubuntu 20.04

• php7.4-cgi - 7.4.3-4ubuntu2.10
• php7.4-fpm - 7.4.3-4ubuntu2.10
• php7.4-cli - 7.4.3-4ubuntu2.10

Ubuntu 18.04

• php7.2-fpm - 7.2.24-0ubuntu0.18.04.11
• php7.2-cli - 7.2.24-0ubuntu0.18.04.11
• php7.2-cgi - 7.2.24-0ubuntu0.18.04.11

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

References

• CVE-2017-9118
• CVE-2021-21707
• CVE-2017-9120
• CVE-2017-8923
• CVE-2017-9119

Related notices

• USN-5300-1
• USN-5300-3