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AUSCERT External Security Bulletin Redistribution
ESB-2018.0433
PHP vulnerabilities
13 February 2018
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AusCERT Security Bulletin Summary
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Product: php5
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Cross-site Scripting -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-5712 CVE-2017-16642 CVE-2017-12933
Reference: ESB-2018.0091
ESB-2018.0092
Original Bulletin:
http://www.ubuntu.com/usn/usn-3566-1
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Ubuntu Security Notice USN-3566-1
12th February, 2018
php5 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
Ubuntu 14.04 LTS
Summary
Several security issues were fixed in PHP.
Software description
php5 - HTML-embedded scripting language interpreter
Details
It was discovered that PHP incorrectly handled the PHAR 404 error page. A
remote attacker could possibly use this issue to conduct cross-site
scripting (XSS) attacks. (CVE-2018-5712)
It was discovered that PHP incorrectly handled memory when unserializing
certain data. A remote attacker could use this issue to cause PHP to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2017-12933)
It was discovered that PHP incorrectly handled 'front of' and 'back of'
date directives. A remote attacker could possibly use this issue to obtain
sensitive information. (CVE-2017-16642)
Update instructions
The problem can be corrected by updating your system to the following package version:
Ubuntu 14.04 LTS:
php5-cli 5.5.9+dfsg-1ubuntu4.23
php5-cgi 5.5.9+dfsg-1ubuntu4.23
libapache2-mod-php5 5.5.9+dfsg-1ubuntu4.23
php5-fpm 5.5.9+dfsg-1ubuntu4.23
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
CVE-2017-12933, CVE-2017-16642, CVE-2018-5712
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