SB2018070612 - Debian update for php7.0
Published: July 6, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Stack-based buffer overflow (CVE-ID: CVE-2018-7584)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to stack-based buffer overflow when handling malicious input. A remote attacker can send specially crafted HTTP response packets, trigger memory corruption and cause the application to crash.
2) Security restrictions bypass (CVE-ID: CVE-2018-10545)
The vulnerability allows a local attacker to bypass security restrictions and obtain potentially sensitive information on the target system.The weakness exists due to improper access controls. A local attacker can change UID and GID, PHP-FPM sets pool worker processes to be dumpable, attach to the PHP-FPM workers and gain access to any restricted resources that are not supposed to be allowed.
3) Infinite loop (CVE-ID: CVE-2018-10546)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to infinite loop. A remote attacker can use a stream filter with convert.iconv and not enough input bytes, trigger an infinite loop, one CPU Core at 100% and cause the service to crash.
4) Cross-site scripting (CVE-ID: CVE-2018-10547)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists in the phar_do_404() and phar_do_403() functions due to insufficient sanitization of user-supplied data processed by the phar_do_404() and phar_do_403() functions, as defined in the ext/phar/phar_object.c source code file. 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.
The vulnerability exists due to an incomplete fix for CVE-2018-5712.
5) Man-in-the-middle attack (CVE-ID: CVE-2018-10548)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in the ext/ldap/ldap.c source code file due to improper handling of return values from the ldap_get_dn function. A remote attacker can use man-in-the middle techniques to trigger ldap_get_dn() to return a NULL pointer and cause ldap_get_entries() because add_assoc_string() to crash.
6) Memory corruption (CVE-ID: CVE-2018-10549)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in exif_read_data() function due to an out-of-bounds read while processing crafted JPEG data. A remote attacker can supply a specially image file, trigger heap-based buffer overflow in exif_iif_add_value and cause the service to crash.
7) 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.
Remediation
Install update from vendor's website.