CVE-2017-7963 : The GNU Multiple Precision Arithmetic Library (GMP) interfaces for PHP through 7

The GNU Multiple Precision Arithmetic Library (GMP) interfaces for PHP through 7.1.4 allow attackers to cause a denial of service (memory consumption and application crash) via operations on long strings. NOTE: the vendor disputes this, stating "There is no security issue here, because GMP safely aborts in case of an OOM condition. The only attack vector here is denial of service. However, if you allow attacker-controlled, unbounded allocations you have a DoS vector regardless of GMP's OOM behavior.

Published 2017-04-19 15:59:00

Updated 2024-08-05 17:15:27

Source MITRE

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2017-7963

PHP » PHP
Versions up to, including, (<=) 7.1.4
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2017-7963

Top countries where our scanners detected CVE-2017-7963

Top open port discovered on systems with this issue 80

IPs affected by CVE-2017-7963 672,085

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2017-7963!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2017-7963

EPSS FAQ

0.10%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 42 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2017-7963

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
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
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2017-7963

CWE-770 Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2017-7963

https://bugs.php.net/bug.php?id=74308

PHP :: Bug #74308 :: Memory corruption in gmp_powm
Issue Tracking;Vendor Advisory