// For flags

CVE-2016-4537

php: bcpowmod accepts negative scale causing heap buffer overflow corrupting _one_ definition

Severity Score

9.8
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

La función bcpowmod en ext/bcmath/bcmath.c en PHP en versiones anteriores a 5.5.35, 5.6.x en versiones anteriores a 5.6.21 y 7.x en versiones anteriores a 7.0.6 acepta un entero negativo para el argumento escala, lo que permite a atacantes remotos provocar una denegación de servicio o posiblemente tener otro impacto no especificado a través de una llamada manipulada.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
Attack Vector
Network
Attack Complexity
High
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2016-05-05 CVE Reserved
  • 2016-05-22 CVE Published
  • 2023-04-24 EPSS Updated
  • 2024-08-06 CVE Updated
  • 2024-08-06 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-20: Improper Input Validation
  • CWE-122: Heap-based Buffer Overflow
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Php
Search vendor "Php"
Php
Search vendor "Php" for product "Php"
<= 5.5.34
Search vendor "Php" for product "Php" and version " <= 5.5.34"
-
Affected
Php
Search vendor "Php"
Php
Search vendor "Php" for product "Php"
5.6.0
Search vendor "Php" for product "Php" and version "5.6.0"
-
Affected
Php
Search vendor "Php"
Php
Search vendor "Php" for product "Php"
5.6.1
Search vendor "Php" for product "Php" and version "5.6.1"
-
Affected
Php
Search vendor "Php"
Php
Search vendor "Php" for product "Php"
5.6.2
Search vendor "Php" for product "Php" and version "5.6.2"
-
Affected
Php
Search vendor "Php"
Php
Search vendor "Php" for product "Php"
5.6.3
Search vendor "Php" for product "Php" and version "5.6.3"
-
Affected
Php
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Php
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5.6.4
Search vendor "Php" for product "Php" and version "5.6.4"
-
Affected
Php
Search vendor "Php"
Php
Search vendor "Php" for product "Php"
5.6.5
Search vendor "Php" for product "Php" and version "5.6.5"
-
Affected
Php
Search vendor "Php"
Php
Search vendor "Php" for product "Php"
5.6.6
Search vendor "Php" for product "Php" and version "5.6.6"
-
Affected
Php
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Php
Search vendor "Php" for product "Php"
5.6.7
Search vendor "Php" for product "Php" and version "5.6.7"
-
Affected
Php
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Php
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5.6.8
Search vendor "Php" for product "Php" and version "5.6.8"
-
Affected
Php
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Php
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5.6.9
Search vendor "Php" for product "Php" and version "5.6.9"
-
Affected
Php
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Php
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5.6.10
Search vendor "Php" for product "Php" and version "5.6.10"
-
Affected
Php
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Php
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5.6.11
Search vendor "Php" for product "Php" and version "5.6.11"
-
Affected
Php
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Php
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5.6.12
Search vendor "Php" for product "Php" and version "5.6.12"
-
Affected
Php
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Php
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5.6.13
Search vendor "Php" for product "Php" and version "5.6.13"
-
Affected
Php
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Php
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5.6.14
Search vendor "Php" for product "Php" and version "5.6.14"
-
Affected
Php
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Php
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5.6.15
Search vendor "Php" for product "Php" and version "5.6.15"
-
Affected
Php
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Php
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5.6.16
Search vendor "Php" for product "Php" and version "5.6.16"
-
Affected
Php
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Php
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5.6.17
Search vendor "Php" for product "Php" and version "5.6.17"
-
Affected
Php
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Php
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5.6.18
Search vendor "Php" for product "Php" and version "5.6.18"
-
Affected
Php
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Php
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5.6.19
Search vendor "Php" for product "Php" and version "5.6.19"
-
Affected
Php
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Php
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5.6.20
Search vendor "Php" for product "Php" and version "5.6.20"
-
Affected
Php
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Php
Search vendor "Php" for product "Php"
7.0.0
Search vendor "Php" for product "Php" and version "7.0.0"
-
Affected
Php
Search vendor "Php"
Php
Search vendor "Php" for product "Php"
7.0.1
Search vendor "Php" for product "Php" and version "7.0.1"
-
Affected
Php
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Php
Search vendor "Php" for product "Php"
7.0.2
Search vendor "Php" for product "Php" and version "7.0.2"
-
Affected
Php
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Php
Search vendor "Php" for product "Php"
7.0.3
Search vendor "Php" for product "Php" and version "7.0.3"
-
Affected
Php
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Php
Search vendor "Php" for product "Php"
7.0.4
Search vendor "Php" for product "Php" and version "7.0.4"
-
Affected
Php
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Php
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7.0.5
Search vendor "Php" for product "Php" and version "7.0.5"
-
Affected
Opensuse
Search vendor "Opensuse"
Leap
Search vendor "Opensuse" for product "Leap"
42.1
Search vendor "Opensuse" for product "Leap" and version "42.1"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
Fedora
Search vendor "Fedoraproject" for product "Fedora"
24
Search vendor "Fedoraproject" for product "Fedora" and version "24"
-
Affected