#VU12907 Off-by-one error in PHP
Vulnerability identifier: #VU12907
Vulnerability risk: High
CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-193
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
PHP
Universal components / Libraries /
Scripting languages
Vendor: PHP Group
Description
The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.
The weakness exists in the phar_parse_pharfile function in ext/phar/phar.c due to off-by-one error. A remote attacker can submit a specially crafted PHAR archive with an alias mismatch and cause the service to crash or execute arbitrary code.
Successful exploitation of the vulnerability may result in system compromise.
Mitigation
Update to version 5.6.30 or 7.0.15.
Vulnerable software versions
PHP: 5.6.0 - 5.6.29, 7.0.0 - 7.0.14
External links
http://www.php.net/ChangeLog-5.php
http://www.php.net/ChangeLog-7.php
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
