In PHP versions:8.1.* before 8.1.34, 8.2.* before 8.2.30, 8.3.* before 8.3.29, 8.4.* before 8.4.16, 8.5.* before 8.5.1, a heap buffer overflow occurs in array_merge() when the total element count of packed arrays exceeds 32-bit limits or HT_MAX_SIZE, due to an integer overflow in the precomputation of element counts using zend_hash_num_elements(). This may lead to memory corruption or crashes and affect the integrity and availability of the target server.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 5
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Php Php
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
|
8.1.0
|
8.1.34
|
|
Php Php
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
|
8.2.0
|
8.2.30
|
|
Php Php
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
|
8.3.0
|
8.3.29
|
|
Php Php
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
|
8.4.0
|
8.4.16
|
|
Php Php
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
|
8.5.0
|
8.5.1
|