SB2018101016 - Multiple vulnerabilities in PHP
Published: October 10, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 vulnerabilities.
1) Cross-site scripting (CVE-ID: CVE-2018-17082)
CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to the header Transfer-Encoding: chunked. 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.
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to obtain potentially sensitive information or cause DoS condition on the target system.
The weakness due to parent private constant in extends class memory leak. A remote attacker can trigger memory leak and gain access to arbitrary data or cause the service to crash.
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to obtain potentially sensitive information or cause DoS condition on the target system.
The weakness due to memory leak when using class_alias() in non-debug mode. A remote attacker can trigger memory leak and gain access to arbitrary data or cause the service to crash.
4) Memory corruption (CVE-ID: N/A)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness due to MessageFormatter::formatMessage memory corruption with 11+ named placeholders. A remote attacker can trigger memory corruption and cause the service to crash.
5) Null pointer dereference (CVE-ID: N/A)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness due to NULL pointer dereference in the default value for RegexIterator's pregFlags. A remote attacker can cause the service to crash.
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to obtain potentially sensitive information or cause DoS condition on the target system.
The weakness due to array_reduce memory leak when an exception is thrown in callback and escapes outside array_reduce. A remote attacker can trigger memory leak and gain access to arbitrary data or cause the service to crash.
Remediation
Install update from vendor's website.