CVE-2016-4537

UnknownEPSS 5.87%

Last modified

CVE-2016-4537 is a vulnerability of currently unknown severity. The bcpowmod function in ext/bcmath/bcmath.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 accepts a negative integer for the scale argument, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted call.. EPSS estimates a 5.87% chance of exploitation in the next 30 days.

Description

The bcpowmod function in ext/bcmath/bcmath.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 accepts a negative integer for the scale argument, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted call.

Metrics

EPSS Probability
5.87%

92.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
PhpPhp<= 5.5.34
PhpPhp5.6.0
PhpPhp5.6.1
PhpPhp5.6.2
PhpPhp5.6.3
PhpPhp5.6.4
PhpPhp5.6.5
PhpPhp5.6.6
PhpPhp5.6.7
PhpPhp5.6.8
PhpPhp5.6.9
PhpPhp5.6.10
PhpPhp5.6.11
PhpPhp5.6.12
PhpPhp5.6.13
PhpPhp5.6.14
PhpPhp5.6.15
PhpPhp5.6.16
PhpPhp5.6.17
PhpPhp5.6.18
PhpPhp5.6.19
PhpPhp5.6.20
PhpPhp7.0.0
PhpPhp7.0.1
PhpPhp7.0.2
PhpPhp7.0.3
PhpPhp7.0.4
PhpPhp7.0.5
OpensuseLeap42.1
FedoraprojectFedora24

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2016-4537?
The bcpowmod function in ext/bcmath/bcmath.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 accepts a negative integer for the scale argument, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted call.
How severe is CVE-2016-4537?
Severity scoring for CVE-2016-4537 is pending analysis. The EPSS model estimates a 5.87% probability of exploitation in the next 30 days.
How do I fix CVE-2016-4537?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-4537?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST