Vulnerability Details : CVE-2017-6441
The _zval_get_long_func_ex in Zend/zend_operators.c in PHP 7.1.2 allows attackers to cause a denial of service (NULL pointer dereference and application crash) via crafted use of "declare(ticks=" in a PHP script. NOTE: the vendor disputes the classification of this as a vulnerability, stating "Please do not request CVEs for ordinary bugs. CVEs are relevant for security issues only.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2017-6441
- cpe:2.3:a:php:php:7.1.2:*:*:*:*:*:*:*
Threat overview for CVE-2017-6441
Top countries where our scanners detected CVE-2017-6441
Top open port discovered on systems with this issue
80
IPs affected by CVE-2017-6441 421
Threat actors abusing to this issue?
Yes
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Exploit prediction scoring system (EPSS) score for CVE-2017-6441
0.36%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 55 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-6441
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
7.5
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2017-6441
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-6441
-
https://bugs.php.net/bug.php?id=74146
PHP :: Bug #74146 :: Null pointer dereference in _zval_get_long_func_ex()Issue Tracking
-
https://github.com/php/php-src/pull/2396
Fix potential crash when setting invalid declare value by sgolemon · Pull Request #2396 · php/php-src · GitHubPatch
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