SB2015081705 - Amazon Linux AMI update for php55
Published: August 17, 2015
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Man-in-the-middle attack (CVE-ID: CVE-2015-3152)
The vulnerability allows a remote attacker to conduct man-in-the-middle attack on the target system.
The vulnerability exists due to use of the --ssl option to mean that SSL is optional. A remote attacker can conduct man-in-the-middle attack, intercept of the communication channel between the affected app and spoof servers via a cleartext-downgrade attack, aka a "BACKRONYM" attack.
2) Input validation error (CVE-ID: CVE-2015-5589)
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
The phar_convert_to_other function in ext/phar/phar_object.c in PHP before 5.4.43, 5.5.x before 5.5.27, and 5.6.x before 5.6.11 does not validate a file pointer before a close operation, which allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted TAR archive that is mishandled in a Phar::convertToData call.
3) Stack-based buffer overflow (CVE-ID: CVE-2015-5590)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the phar_fix_filepath function in ext/phar/phar.c when processing a large length value, as demonstrated by mishandling of an e-mail attachment by the imap PHP extension. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
4) Input validation error (CVE-ID: CVE-2015-6831)
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
Multiple use-after-free vulnerabilities in SPL in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12 allow remote attackers to execute arbitrary code via vectors involving (1) ArrayObject, (2) SplObjectStorage, and (3) SplDoublyLinkedList, which are mishandled during unserialization. <a href="http://cwe.mitre.org/data/definitions/416.html">CWE-416: Use After Free</a>
5) Use-after-free (CVE-ID: CVE-2015-6832)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when processing crafted serialized data that triggers misuse of an array field. <a href="http://cwe.mitre.org/data/definitions/416. A remote attackers can execute arbitrary code.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
6) Path traversal (CVE-ID: CVE-2015-6833)
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in the PharData class in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12. A remote authenticated attacker can send a specially crafted HTTP request and remote attackers to write to arbitrary files via a . (dot dot) in a ZIP archive entry that is mishandled during an extractTo call.
Remediation
Install update from vendor's website.