SB2018021207 - Ubuntu update for PHP
Published: February 12, 2018 Updated: November 27, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Reflected cross-site scripting (CVE-ID: CVE-2018-5712)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists on the PHAR 404 error page due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
2) Deserialization of untrusted data (CVE-ID: CVE-2017-12933)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a buffer over-read while unserializing untrusted data in the finish_nested_data function in ext/standard/var_unserializer.re. A remote attacker can perform a denial of service attack.
3) Out-of-bounds read (CVE-ID: CVE-2017-16642)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to out-of-bounds read in timelib_meridian(). A remote attacker can cause the application to crash.
Remediation
Install update from vendor's website.